@ARTICLE{2020SoPh..295..106M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Magnetic and Velocity Field Topology in Active Regions of Descending Phase of Solar Cycle 23",
      journal = {\solphys},
         year = 2020,
       volume = {295},
       number = {8},
          eid = {106},
        pages = {106},
          doi = {10.1007/s11207-020-01666-4},
archivePrefix = {arXiv},
       eprint = {2006.13602},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2020SoPh..295..106M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2016AsJPh..25..267A,
       author = {{Ambastha}, Ashok},
        title = "Solar activity and explosive transient eruptions",
      journal = {Asian Journal of Physics},
         year = 2016,
       volume = {25},
       number = {3},
        pages = {267-294},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2016AsJPh..25..267A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2014A&A...561A.123M,
       author = {{Maurya}, R.~A. and {Ambastha}, A. and {Chae}, J.},
        title = "Activity-related variations of high-degree p-mode amplitude, width, and energy in solar active regions",
      journal = {\aap},
         year = 2014,
       volume = {561},
          eid = {A123},
        pages = {A123},
          doi = {10.1051/0004-6361/201321241},
archivePrefix = {arXiv},
       eprint = {1310.6458},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2014A&A...561A.123M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2013BASI...41..183V,
       author = {{Vemareddy}, P. and {Ambastha}, A. and {Wiegelmann}, T.},
        title = "Magnetic structure of solar active region NOAA 11158",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2013,
       volume = {41},
       number = {3},
        pages = {183},
archivePrefix = {arXiv},
       eprint = {1310.6895},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2013BASI...41..183V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2013SPD....4430003P,
       author = {{Panditi}, Vemareddy and {Ambastha}, A. and {Maurya}, R. and {Chae}, J. and {Ambstha}, A. and {Maurya}, R.~A. and {Chae}, J.},
        title = "Helicity injection by flux motions and its role in flare and CMEs",
    booktitle = {AAS/Solar Physics Division Abstracts \#44},
         year = 2013,
       series = {AAS/Solar Physics Division Meeting},
       volume = {44},
          eid = {300.03},
        pages = {300.03},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2013SPD....4430003P},
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@INPROCEEDINGS{2013SPD....44..120P,
       author = {{Panditi}, Vemareddy and {Ambastha}, A. and {Maurya}, R.},
        title = "On the Role of Rotating Sunspots in the Activity of Solar Active Region NOAA 11158",
    booktitle = {AAS/Solar Physics Division Abstracts \#44},
         year = 2013,
       series = {AAS/Solar Physics Division Meeting},
       volume = {44},
          eid = {100.120},
        pages = {100.120},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2013SPD....44..120P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2013enss.confE...8V,
       author = {{Vemareddy}, P. and {Ambastha}, A. and {Maurya}, R.~A. and {Chae}, J.},
        title = "Helicity Injection by the Shearing Motion of Fluxes in Relation to Flares and Coronal Mass Ejections",
    booktitle = {SDO-3: Exploring the Network of SDO Science},
         year = 2013,
          eid = {8},
        pages = {8},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2013enss.confE...8V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2013enss.confE...6V,
       author = {{Vemareddy}, P. and {Ambastha}, A. and {Maurya}, R.~A.},
        title = "Rotating sunspots and their role in the activity of solar active region NOAA 11158",
    booktitle = {SDO-3: Exploring the Network of SDO Science},
         year = 2013,
          eid = {6},
        pages = {6},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2013enss.confE...6V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2012ApJ...761...86V,
       author = {{Vemareddy}, P. and {Ambastha}, A. and {Maurya}, R.~A. and {Chae}, J.},
        title = "On the Injection of Helicity by the Shearing Motion of Fluxes in Relation to Flares and Coronal Mass Ejections",
      journal = {\apj},
         year = 2012,
       volume = {761},
       number = {2},
          eid = {86},
        pages = {86},
          doi = {10.1088/0004-637X/761/2/86},
archivePrefix = {arXiv},
       eprint = {1202.5195},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012ApJ...761...86V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2012ApJ...761...60V,
       author = {{Vemareddy}, P. and {Ambastha}, A. and {Maurya}, R.~A.},
        title = "On the Role of Rotating Sunspots in the Activity of Solar Active Region NOAA 11158",
      journal = {\apj},
         year = 2012,
       volume = {761},
       number = {1},
          eid = {60},
        pages = {60},
          doi = {10.1088/0004-637X/761/1/60},
archivePrefix = {arXiv},
       eprint = {1210.3912},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012ApJ...761...60V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2012DPS....4450807T,
       author = {{Tanga}, Paolo and {Widemann}, T. and {Ambastha}, A. and {Babcock}, B.~A. and {Berthier}, J. and {Bouley}, S. and {Braga-Ribas}, F. and {Brasch}, K. and {Burke}, W. and {Colas}, F. and {Fukuhara}, T. and {Fulham}, L. and {Imai}, M. and {Lu}, M. and {Machado}, P. and {Maquet}, L. and {Pasachoff}, J.~M. and {Roberts}, J. and {Schneider}, G. and {Sheehan}, W. and {Sigismondi}, C. and {Thouvenin}, N. and {Vachier}, F. and {Veillet}, C. and {Wang}, X.},
        title = "The Venus Twilight Experiment: Probing The Mesosphere In 2004 And 2012",
    booktitle = {AAS/Division for Planetary Sciences Meeting Abstracts \#44},
         year = 2012,
       series = {AAS/Division for Planetary Sciences Meeting Abstracts},
       volume = {44},
          eid = {508.07},
        pages = {508.07},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012DPS....4450807T},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2012cosp...39.1440P,
       author = {{Panditi}, Vemareddy and {Ambastha}, Ashok and {Maurya}, Ram Ajor},
        title = "On the Injection of Helicity by Shearing Motion of Fluxes in Relation to Flares and CMEs",
    booktitle = {39th COSPAR Scientific Assembly},
         year = 2012,
       volume = {39},
        pages = {1440},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012cosp...39.1440P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2012cosp...39...42A,
       author = {{Ambastha}, Ashok and {Maurya}, Ram Ajor and {Panditi}, Vemareddy},
        title = "Photospheric Transients and Spectral Line Changes Associated with a Large X2.2 Flare",
    booktitle = {39th COSPAR Scientific Assembly},
         year = 2012,
       volume = {39},
        pages = {42},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012cosp...39...42A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2012SoPh..277..337V,
       author = {{Vemareddy}, P. and {Maurya}, R.~A. and {Ambastha}, A.},
        title = "Filament Eruption in NOAA 11093 Leading to a Two-Ribbon M1.0 Class Flare and CME",
      journal = {\solphys},
         year = 2012,
       volume = {277},
       number = {2},
        pages = {337-354},
          doi = {10.1007/s11207-011-9903-6},
archivePrefix = {arXiv},
       eprint = {1103.3168},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012SoPh..277..337V},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2012JApA...33....1D,
       author = {{Das}, A.~C. and {Ambastha}, Ashok},
        title = "High Energy Emissions from Young Stellar Objects",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2012,
       volume = {33},
       number = {1},
        pages = {1-8},
          doi = {10.1007/s12036-012-9138-4},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012JApA...33....1D},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2012ApJ...747..134M,
       author = {{Maurya}, R.~A. and {Vemareddy}, P. and {Ambastha}, A.},
        title = "Velocity and Magnetic Transients Driven by the X2.2 White-light Flare of 2011 February 15 in NOAA 11158",
      journal = {\apj},
         year = 2012,
       volume = {747},
       number = {2},
          eid = {134},
        pages = {134},
          doi = {10.1088/0004-637X/747/2/134},
archivePrefix = {arXiv},
       eprint = {1106.4166},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012ApJ...747..134M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2012ASInC...6..197A,
       author = {{Ambastha}, Ashok and {Maurya}, Ram A.},
        title = "Spectral line profile changes associated with energetic solar transients",
    booktitle = {Astronomical Society of India Conference Series},
         year = 2012,
       editor = {{Prugniel}, Philippe and {Singh}, Harinder P.},
       series = {Astronomical Society of India Conference Series},
       volume = {6},
        pages = {197},
archivePrefix = {arXiv},
       eprint = {1203.3326},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2012ASInC...6..197A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2011JPhCS.271a2003M,
       author = {{Maurya}, Ram Ajor and {Ambastha}, Ashok and {Reddy}, Vema},
        title = "Kinetic and magnetic helicities in solar active regions",
    booktitle = {GONG-SoHO 24: A New Era of Seismology of the Sun and Solar-Like Stars},
         year = 2011,
       series = {Journal of Physics Conference Series},
       volume = {271},
          eid = {012003},
        pages = {012003},
          doi = {10.1088/1742-6596/271/1/012003},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2011JPhCS.271a2003M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2011ASInC...2..189M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Variations in p-mode parameters and sub-surface flows of active regions with flare activity",
    booktitle = {Astronomical Society of India Conference Series},
         year = 2011,
       series = {Astronomical Society of India Conference Series},
       volume = {2},
        pages = {189-195},
archivePrefix = {arXiv},
       eprint = {1106.4180},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2011ASInC...2..189M},
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@ARTICLE{2010ApJ...714L.196M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Sub-surface Meridional Flow, Vorticity, and the Lifetime of Solar Active Regions",
      journal = {\apjl},
         year = 2010,
       volume = {714},
       number = {2},
        pages = {L196-L201},
          doi = {10.1088/2041-8205/714/2/L196},
archivePrefix = {arXiv},
       eprint = {1003.5273},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010ApJ...714L.196M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2010SoPh..262..337M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "A Technique for Automated Determination of Flare Ribbon Separation and Energy Release",
      journal = {\solphys},
         year = 2010,
       volume = {262},
       number = {2},
        pages = {337-353},
          doi = {10.1007/s11207-009-9488-5},
archivePrefix = {arXiv},
       eprint = {0910.4245},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010SoPh..262..337M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2010cosp...38.3025M,
       author = {{Maurya}, Ram Ajor and {Ambastha}, Ashok},
        title = "The Association of Energetic Events with p-Mode Energy",
    booktitle = {38th COSPAR Scientific Assembly},
         year = 2010,
       volume = {38},
        pages = {3},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010cosp...38.3025M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2010ASSP...19..517M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Magnetic and Velocity Field Changes Related to the Solar Flares of 28 and 29 October 2003",
    booktitle = {Magnetic Coupling between the Interior and Atmosphere of the Sun},
         year = 2010,
       series = {Astrophysics and Space Science Proceedings},
       volume = {19},
        pages = {517-517},
          doi = {10.1007/978-3-642-02859-5\_78},
archivePrefix = {arXiv},
       eprint = {0906.3965},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010ASSP...19..517M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2010ASSP...19..516M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Flows in Flaring and Dormant Active Regions",
    booktitle = {Magnetic Coupling between the Interior and Atmosphere of the Sun},
         year = 2010,
       series = {Astrophysics and Space Science Proceedings},
       volume = {19},
        pages = {516-516},
          doi = {10.1007/978-3-642-02859-5\_77},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010ASSP...19..516M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2010ASSP...18...15A,
       author = {{Ambastha}, Ashok},
        title = "Solar Interior",
    booktitle = {Heliophysical Processes},
         year = 2010,
       series = {Astrophysics and Space Science Proceedings},
       volume = {18},
        pages = {15},
          doi = {10.1007/978-3-642-11341-3\_2},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010ASSP...18...15A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@PROCEEDINGS{2010ASSP...18.....G,
        title = "Heliophysical Processes",
    booktitle = {Heliophysical Processes},
         year = 2010,
       series = {Astrophysics and Space Science Proceedings},
       volume = {18},
          doi = {10.1007/978-3-642-11341-3},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2010ASSP...18.....G},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2009ApJ...706L.235M,
       author = {{Maurya}, R.~A. and {Ambastha}, A. and {Tripathy}, S.~C.},
        title = "Variations in p-Mode Parameters with Changing Onset Time of a Large Flare",
      journal = {\apjl},
         year = 2009,
       volume = {706},
       number = {2},
        pages = {L235-L239},
          doi = {10.1088/0004-637X/706/2/L235},
archivePrefix = {arXiv},
       eprint = {0910.4247},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2009ApJ...706L.235M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2009SoPh..258...31M,
       author = {{Maurya}, R.~A. and {Ambastha}, A.},
        title = "Transient Magnetic and Doppler Features Related to the White-Light Flares in NOAA 10486",
      journal = {\solphys},
         year = 2009,
       volume = {258},
       number = {1},
        pages = {31-52},
          doi = {10.1007/s11207-009-9397-7},
archivePrefix = {arXiv},
       eprint = {0903.2138},
 primaryClass = {astro-ph.SR},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2009SoPh..258...31M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2008JApA...29..249M,
       author = {{Maurya}, Ram Ajor and {Ambastha}, Ashok},
        title = "H{\ensuremath{\alpha}} intensity oscillations in large flares",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2008,
       volume = {29},
       number = {1-2},
        pages = {249-252},
          doi = {10.1007/s12036-008-0031-0},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2008JApA...29..249M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2008JApA...29..103M,
       author = {{Maurya}, Ram Ajor and {Ambastha}, Ashok},
        title = "Magnetic and velocity field variations in the active regions NOAA 10486 and NOAA 10488",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2008,
       volume = {29},
       number = {1-2},
        pages = {103-105},
          doi = {10.1007/s12036-008-0013-2},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2008JApA...29..103M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2008JApA...29...93A,
       author = {{Ambastha}, Ashok},
        title = "Helioseismic effects of energetic transients",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2008,
       volume = {29},
       number = {1-2},
        pages = {93-101},
          doi = {10.1007/s12036-008-0012-3},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2008JApA...29...93A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2008BASIP..25...29A,
       author = {{Ambastha}, Ashok},
        title = "Excitation of solar p-modes by energetic transients",
    booktitle = {Bulletin of the Astronomical Society of India Proceedings},
         year = 2008,
       series = {Bulletin of the Astronomical Society of India Proceedings},
       volume = {25},
        pages = {29},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2008BASIP..25...29A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2007BASI...35..419A,
       author = {{Ambastha}, A.},
        title = "Signatures of large flares on photospheric magnetic and velocity fields",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2007,
       volume = {35},
        pages = {419-426},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2007BASI...35..419A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2007SunGe...2...13A,
       author = {{Ambastha}, A.},
        title = "Evolution of Magnetic and Velocity Fields in Super-active Region NOAA10486 and the Large 4B/X17.2 Flare of October 28, 2003",
      journal = {Sun and Geosphere},
         year = 2007,
       volume = {2},
       number = {1},
        pages = {13-18},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2007SunGe...2...13A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2007AIPC..919..173A,
       author = {{Ambastha}, Ashok},
        title = "Solar Activity",
    booktitle = {Kodai School on Solar Physics},
         year = 2007,
       editor = {{Hasan}, S.~S. and {Banerjee}, D.},
       series = {Am.\ Inst.\ Phys.\ Conf.},
       volume = {919},
        pages = {173-213},
          doi = {10.1063/1.2756787},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2007AIPC..919..173A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@INPROCEEDINGS{2006ihy..workE..26A,
       author = {{Ambastha}, A.},
        title = "Signatures of Large Flares on Photospheric Magnetic and Velocity Fields",
    booktitle = {2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science},
         year = 2006,
          eid = {26},
        pages = {26},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2006ihy..workE..26A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2006SoPh..238..219A,
       author = {{Ambastha}, Ashok and {Antia}, H.~M.},
        title = "Possibility of Excitation of Low-{\ensuremath{\ell}} P-Modes by Energetic Solar Transients",
      journal = {\solphys},
         year = 2006,
       volume = {238},
       number = {2},
        pages = {219-230},
          doi = {10.1007/s11207-006-0234-y},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2006SoPh..238..219A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2006JApA...27..255A,
       author = {{Ambastha}, Ashok},
        title = "Photospheric, Chromospheric and Helioseismic Signatures of a Large Flare in Super-active Region NOAA 10486",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2006,
       volume = {27},
        pages = {255-265},
          doi = {10.1007/BF02702528},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2006JApA...27..255A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2006SoPh..233..171A,
       author = {{Ambastha}, Ashok and {Ravindra}, B. and {Gosain}, Sanjay},
        title = "H$\_{{\ensuremath{\alpha}}}$ Observations of 8 June, 2004 Venus Transit",
      journal = {\solphys},
         year = 2006,
       volume = {233},
       number = {1},
        pages = {171-184},
          doi = {10.1007/s11207-006-2371-8},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2006SoPh..233..171A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
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@ARTICLE{2005BASI...33..366R,
       author = {{Ravindra}, B. and {Ambastha}, Ashok and {Gosain}, Sanjay},
        title = "Preliminary Results of Venus Transit of June 8, 2004 Observed in H{\ensuremath{\alpha}} 6563 {\r{A}}",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2005,
       volume = {33},
        pages = {366-366},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2005BASI...33..366R},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2005BASI...33..364A,
       author = {{Ambastha}, Ashok},
        title = "Magnetic Evolution of Super-Active Region NOAA AR 10486 and the Large 4B/X17.2 Class Flare Observed During Octbober 28, 2003",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2005,
       volume = {33},
        pages = {364-364},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2005BASI...33..364A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2005BASI...33..360J,
       author = {{Janve}, Vaibhav A. and {Ambastha}, Ashok},
        title = "Spectral Characterization of Solar Active Region NOAA 8242 in Quiet and Sunspot Locations",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2005,
       volume = {33},
        pages = {360-360},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2005BASI...33..360J},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2004ESASP.559..293A,
       author = {{Ambastha}, A. and {Basu}, S. and {Antia}, H.~M. and {Bogart}, R.~S.},
        title = "Solar P-Mode Characteristics Associated with Superactive-Regions Observed during OCT NOV 2003",
    booktitle = {SOHO 14 Helio- and Asteroseismology: Towards a Golden Future},
         year = 2004,
       editor = {{Danesy}, D.},
       series = {ESA Special Publication},
       volume = {559},
        pages = {293},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2004ESASP.559..293A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2004ESASP.559..289A,
       author = {{Ambastha}, A. and {Antia}, H.~M.},
        title = "Variations in LOW-l Solar P-Modes with Flare Activity",
    booktitle = {SOHO 14 Helio- and Asteroseismology: Towards a Golden Future},
         year = 2004,
       editor = {{Danesy}, D.},
       series = {ESA Special Publication},
       volume = {559},
        pages = {289},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2004ESASP.559..289A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2003SoPh..218..151A,
       author = {{Ambastha}, Ashok and {Basu}, Sarbani and {Antia}, H.~M.},
        title = "Flare-Induced Excitation of Solar p modes",
      journal = {\solphys},
         year = 2003,
       volume = {218},
       number = {1},
        pages = {151-172},
          doi = {10.1023/B:SOLA.0000013043.45512.20},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003SoPh..218..151A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2003BASI...31..455S,
       author = {{Sridharan}, Rengaswamy and {Raja Bayanna}, A. and {Srivastava}, Nandita and {Kumar}, Brajesh and {Ravindra}, B. and {Gupta}, S.~K. and {Jain}, Naresh and {Ambastha}, A. and {Venkatakrishnan}, P.},
        title = "Performance Evaluation of Adaptive Optics Systems",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2003,
       volume = {31},
        pages = {455-456},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003BASI...31..455S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2003BASI...31..319A,
       author = {{Ambastha}, Ashok and {Basu}, Sarbani and {Antia}, H.~M.},
        title = "Excitation of Solar p-mode Oscillations by Flares",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2003,
       volume = {31},
        pages = {319-320},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003BASI...31..319A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2003BASI...31..295A,
       author = {{Ambastha}, Ashok and {Gosain}, Sanjay},
        title = "White Light and Emission Line Polarization of Solar Corona during TSE of June 21, 2001",
      journal = {Bulletin of the Astronomical Society of India},
         year = 2003,
       volume = {31},
        pages = {295-296},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003BASI...31..295A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2003ESASP.517..219A,
       author = {{Ambastha}, Ashok and {Basu}, Sarbani and {Antia}, H.~M.},
        title = "Effects of flares on solar oscillation characteristics",
    booktitle = {GONG+ 2002. Local and Global Helioseismology: the Present and Future},
         year = 2003,
       editor = {{Sawaya-Lacoste}, Huguette},
       series = {ESA Special Publication},
       volume = {517},
        pages = {219-222},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003ESASP.517..219A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INCOLLECTION{2003LNP...619..127A,
       author = {{Ambastha}, A.},
        title = "The Active and Explosive Sun",
    booktitle = {Lectures on Solar Physics},
         year = 2003,
       editor = {{Antia}, H.~M. and {Bhatnagar}, A. and {Ulmschneider}, P.},
       volume = {619},
        pages = {127},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2003LNP...619..127A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2002ESASP.508...43A,
       author = {{Ambastha}, Ashok and {Basu}, Sarbani and {Antia}, H.~M.},
        title = "Effect of flares on solar oscillations characteristics",
    booktitle = {From Solar Min to Max: Half a Solar Cycle with SOHO},
         year = 2002,
       editor = {{Wilson}, A.},
       series = {ESA Special Publication},
       volume = {508},
        pages = {43-46},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2002ESASP.508...43A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2002adaa.conf..177A,
       author = {{Ambastha}, Ashok},
        title = "Digital Imaging Techniques for Solar Magnetic and Velocity Fields",
    booktitle = {Automated Data Analysis in Astronomy},
         year = 2002,
       editor = {{Gupta}, Ranjan and {Singh}, Harinder P. and {Bailer-Jones}, Coryn A.~L.},
        pages = {177},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2002adaa.conf..177A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@MISC{2001csfa.rept.....A,
       author = {{Ambastha}, A. and {Agrawal}, Reetu},
        title = "A catalogue of Solar Filament Analysis: Year 2000",
 howpublished = {A catalogue of Solar Filament Analysis: Year 2000, Publication of the Udaipur Solar Observatory, Udaipur, India, 2001},
         year = 2001,
       adsurl = {https://ui.adsabs.harvard.edu/abs/2001csfa.rept.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{2001ASPC..236..313A,
       author = {{Ambastha}, A. and {Mathew}, S.~K.},
        title = "A Comparison of Flux Emergence, Cancellation, and Motions in Flaring and Non-Flaring Sites of NOAA 8038 Observed by USO Magnetograph",
    booktitle = {Advanced Solar Polarimetry -- Theory, Observation, and Instrumentation},
         year = 2001,
       editor = {{Sigwarth}, Michael},
       series = {Astron.\ Soc.\ Pacific Conf.\ Ser.},
       volume = {236},
        pages = {313},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2001ASPC..236..313A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2000SoPh..197...75M,
       author = {{Mathew}, Shibu K. and {Ambastha}, Ashok},
        title = "Magnetic field gradient and flare: study of a small flare in NOAA 8038",
      journal = {\solphys},
         year = 2000,
       volume = {197},
       number = {1},
        pages = {75-84},
          doi = {10.1023/A:1026568430463},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2000SoPh..197...75M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2000JApA...21..271A,
       author = {{Ambastha}, Ashok and {Mathew}, Shibu K.},
        title = "Relationship of Non-potentially and Flaring: Intercomparison for an Mclass Flare",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2000,
       volume = {21},
        pages = {271},
          doi = {10.1007/BF02702408},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2000JApA...21..271A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{2000JApA...21..233M,
       author = {{Mathew}, Shibu K. and {Ambastha}, Ashok},
        title = "A Rapidly Evolving Active Region NOAA 8032 Observed on April 15th 1997",
      journal = {Journal of Astrophysics and Astronomy},
         year = 2000,
       volume = {21},
        pages = {233},
          doi = {10.1007/BF02702397},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2000JApA...21..233M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@MISC{2000csfa.rept.....A,
       author = {{Ambastha}, A. and {Pathak}, Kumud and {Agrawal}, Reetu},
        title = "A catalogue of Solar Filament Analysis: Year 1999",
 howpublished = {A catalogue of Solar Filament Analysis: Year 1999, Publication of the Udaipur Solar Observatory, Udaipur, India, 2000.},
         year = 2000,
       adsurl = {https://ui.adsabs.harvard.edu/abs/2000csfa.rept.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1999BASI...27..411P,
       author = {{Prasad}, C. Debi and {Ambastha}, Ashok and {Mathew}, Shibu K.},
        title = "Dynamical properties of quiescent prominence in He D3 5876 \&Aring line emission",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1999,
       volume = {27},
        pages = {411},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1999BASI...27..411P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1999BASI...27..411D,
       author = {{Debi Prasad}, C. and {Ambastha}, A. and {Mathew}, S.~K.},
        title = "Dynamical properties of quiescent prominence in He D3 5876 {\r{A}} line emission.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1999,
       volume = {27},
       number = {3},
        pages = {411-414},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1999BASI...27..411D},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1999ASSL..243..321M,
       author = {{Mathew}, S.~K. and {Bhatnagar}, A. and {Debi Prasad}, C. and {Ambastha}, A.},
        title = "Circular polarization measurement using a tunable lithium niobate Fabry-Perot filter",
    booktitle = {Polarization},
         year = 1999,
       editor = {{Nagendra}, K.~N. and {Stenflo}, J.~O.},
       series = {Astrophysics and Space Science Library},
       volume = {243},
        pages = {321-324},
          doi = {10.1007/978-94-015-9329-8\_27},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1999ASSL..243..321M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1999ASPC..183..523P,
       author = {{Prasad}, D. and {Gary}, G. and {Ambastha}, A.},
        title = "Complex H {\ensuremath{\alpha}} Loop Activity in a Long Duration Flare",
    booktitle = {High Resolution Solar Physics: Theory, Observations, and Techniques},
         year = 1999,
       editor = {{Rimmele}, T.~R. and {Balasubramaniam}, K.~S. and {Radick}, R.~R.},
       series = {Astron.\ Soc.\ Pacific Conf.\ Ser.},
       volume = {183},
        pages = {523},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1999ASPC..183..523P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1999ASPC..183..256M,
       author = {{Mathew}, S. and {Bhatnagar}, A. and {Debi Prasad}, C. and {Ambastha}, A.},
        title = "High Resolution Longitudinal Magnetic Field Measurements Using a Fabry-Perot Lithium Niobate Filter Based Video Magnetograph",
    booktitle = {High Resolution Solar Physics: Theory, Observations, and Techniques},
         year = 1999,
       editor = {{Rimmele}, T.~R. and {Balasubramaniam}, K.~S. and {Radick}, R.~R.},
       series = {Astron.\ Soc.\ Pacific Conf.\ Ser.},
       volume = {183},
        pages = {256},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1999ASPC..183..256M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998A&AS..133..285M,
       author = {{Mathew}, S.~K. and {Bhatnagar}, A. and {Prasad}, C.~D. and {Ambastha}, A.},
        title = "Fabry-Perot filter based solar video magnetograph",
      journal = {\aaps},
         year = 1998,
       volume = {133},
        pages = {285-292},
          doi = {10.1051/aas:1998312},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998A&AS..133..285M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998BASI...26.....A,
       author = {{Ambastha}, A.},
        title = "Solar physics in India during the next solar maximum and beyond. Proceedings. Physical Research Laboratory (Ahmedabad) Golden Jubilee Workshop, Udaipur (India), 7 - 10 Oct 1996.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1998,
       volume = {26},
       number = {2},
        pages = {I-III},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998BASI...26.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998SoPh..179..133C,
       author = {{Choudhary}, Debi Prasad and {Ambastha}, Ashok and {Ai}, G.},
        title = "Emerging Flux and X-class Flares in NOAA 6555",
      journal = {\solphys},
         year = 1998,
       volume = {179},
       number = {1},
        pages = {133-140},
          doi = {10.1023/A:1005063609450},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998SoPh..179..133C},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998Reson...3...18A,
       author = {{Ambastha}, A.},
        title = "Probing the Solar Interior: Hearing the Heartbeats of 1he Sun",
      journal = {Resonance},
         year = 1998,
       volume = {3},
        pages = {18-31},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998Reson...3...18A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998ExA.....8..125D,
       author = {{Debi Prasad}, C. and {Mathew}, Shibu K. and {Bhatnagar}, Arvind and {Ambastha}, Ashok},
        title = "Solar Photospheric and Chromospheric Observations using a Lithium Niobate Fabry-Perot ETALON",
      journal = {Experimental Astronomy},
         year = 1998,
       volume = {8},
       number = {2},
        pages = {125-133},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998ExA.....8..125D},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1998Ap&SS.262...29S,
       author = {{Srivastava}, Nandita and {Ambastha}, Ashok},
        title = "Dynamics of Helically Twisted Prominence of January 22, 1979",
      journal = {\apss},
         year = 1998,
       volume = {262},
       number = {1},
        pages = {29-38},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998Ap&SS.262...29S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1998ASPC..140..113A,
       author = {{Ambastha}, Ashok},
        title = "The Role of Magnetic Shear and New Emerging Fluxes in Producing Large Solar Flares",
    booktitle = {Synoptic Solar Physics},
         year = 1998,
       editor = {{Balasubramaniam}, K.~S. and {Harvey}, Jack and {Rabin}, D.},
       series = {Astron.\ Soc.\ Pacific Conf.\ Ser.},
       volume = {140},
        pages = {113},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1998ASPC..140..113A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1997JApA...18...39D,
       author = {{Debi Prasad}, C. and {Ambastha}, Ashok and {Srivastava}, Nandita and {Tripathy}, Sushanta C. and {Hagyard}, Mona J.},
        title = "Chromospheric Evolution and the Flare Activity of Super-Active Region NOAA 6555",
      journal = {Journal of Astrophysics and Astronomy},
         year = 1997,
       volume = {18},
       number = {1},
        pages = {39-55},
          doi = {10.1007/BF02714853},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1997JApA...18...39D},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1997astro.ph..3179T,
       author = {{Tripathy}, S.~C. and {Antia}, H.~M. and {Hill}, F. and {Ambastha}, A.},
        title = "Seismic investigation of the solar structure using GONG frequencies",
      journal = {arXiv e-prints},
         year = 1997,
          eid = {astro-ph/9703179},
        pages = {astro-ph/9703179},
archivePrefix = {arXiv},
       eprint = {astro-ph/9703179},
 primaryClass = {astro-ph},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1997astro.ph..3179T},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1997KodOB..13...17P,
       author = {{Prasad C.}, D. and {Ambastha}, A.~K.},
        title = "No signature of circum-solar dust ring up to 5 R$\_{sun}$ from optical polarization and near IR observations of 24 October 1995 total solar eclipse.",
      journal = {Kodaikanal Observatory Bulletins},
         year = 1997,
       volume = {13},
        pages = {17-23},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1997KodOB..13...17P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1997IAUJD..19E..11A,
       author = {{Ambastha}, Ashok and {Prasad}, C. Debi},
        title = "The Role of Magnetic Shear and New Emerging Fluxes in Producing Large Solar Flares in NOAA AR 6555",
    booktitle = {IAU Joint Discussion},
         year = 1997,
       series = {IAU Joint Discussion},
       volume = {23},
          eid = {11},
        pages = {11},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1997IAUJD..19E..11A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1996mpsa.conf..533A,
       author = {{Ambastha}, A. and {Fontenla}, J.~M. and {Hagyard}, M.~J.},
        title = "Electric Currents and Magnetic Shear Variations during Some Flares of M- and X-Class",
    booktitle = {IAU Colloq. 153: Magnetodynamic Phenomena in the Solar Atmosphere - Prototypes of Stellar Magnetic Activity},
         year = 1996,
       editor = {{Uchida}, Yutaka and {Kosugi}, Takeo and {Hudson}, Hugh S.},
        pages = {533},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1996mpsa.conf..533A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1995BASI...23..428A,
       author = {{Ambastha}, Ashok and {Mona}, Hagyard J. and {West}, E.~A.},
        title = "A large flare in an area of weak magnetic field and low shear: a counter - example!",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1995,
       volume = {23},
        pages = {428-429},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1995BASI...23..428A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1995BASI...23..427D,
       author = {{Debi Prasad}, C. and {Srivastava}, Nandita and {Tripathy}, Sushantha C. and {Ambastha}, Ashok},
        title = "Chromospheric, photospheric, magnetic field evolution and flare activity of the super active region NOAA 6555",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1995,
       volume = {23},
        pages = {427-428},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1995BASI...23..427D},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1995ApJ...440..894F,
       author = {{Fontenla}, J.~M. and {Ambastha}, A. and {Kalman}, B. and {Csepura}, Gy.},
        title = "The Magnetic Evolution of AR 6555 Which LED to Two Impulsive, Relatively Compact, X-Type Flares",
      journal = {\apj},
         year = 1995,
       volume = {440},
        pages = {894},
          doi = {10.1086/175328},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1995ApJ...440..894F},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1993SoPh..148..277A,
       author = {{Ambastha}, Ashok and {Hagyard}, Mona J. and {West}, E.~A.},
        title = "Evolutionary and flare-associated magnetic shear variations observed in a complex, flare-productive active region",
      journal = {\solphys},
         year = 1993,
       volume = {148},
       number = {2},
        pages = {277-299},
          doi = {10.1007/BF00645091},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1993SoPh..148..277A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1993BAAS...25R1189A,
       author = {{Ambastha}, A. and {Hagyard}, M.~J. and {West}, E.~A.},
        title = "Evolution and Flare-Associated Magnetic Shear Variation in Solar Active Regions",
    booktitle = {Bulletin of the American Astronomical Society},
         year = 1993,
       volume = {25},
        pages = {1189},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1993BAAS...25R1189A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1993BAAS...25Q1190H,
       author = {{Hagyard}, M.~J. and {West}, E.~A. and {Smith}, J.~E. and {Ambastha}, A. and {Kenny}, E.~G.},
        title = "A Study of Photospheric Magnetic Fields Associated with the June 1991 Active Region",
    booktitle = {Bulletin of the American Astronomical Society},
         year = 1993,
       volume = {25},
        pages = {1190},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1993BAAS...25Q1190H},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1993icpc.proc..151A,
       author = {{Ambastha}, A.},
        title = "Stability of Self-Gravitating Finite Disks",
    booktitle = {IAU Colloq. 132: Instability, Chaos and Predictability in Celestial Mechanics and Stellar Dynamics},
         year = 1993,
       editor = {{Bhatnagar}, K.~B.},
        pages = {151},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1993icpc.proc..151A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INCOLLECTION{1992LNP...399...59B,
       author = {{Bhatnagar}, A. and {Ambastha}, A. and {Srivastava}, N.},
        title = "Filament Eruptions Flaring Arches and Eruptive Flares",
    booktitle = {IAU Colloq. 133: Eruptive Solar Flares},
         year = 1992,
       editor = {{Svestka}, Zdenek and {Jackson}, Bernard V. and {Machado}, Marcos E.},
       volume = {399},
        pages = {59},
          doi = {10.1007/3-540-55246-4\_77},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1992LNP...399...59B},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1991BASI...19..211A,
       author = {{Ambastha}, A. and {Bhatnagar}, A. and {Srivastava}, N. and {Jain}, R.~M. and {Gupta}, S.~K. and {Sharma}, R. and {Agrawal}, G.},
        title = "Results of GONG site survey program at the Udaipur Solar Observatory.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1991,
       volume = {19},
       number = {3},
        pages = {211},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1991BASI...19..211A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1991BASI...19..208S,
       author = {{Srivastava}, N. and {Ambastha}, A. and {Bhatnagar}, A.},
        title = "Helically twisted prominence eruption event of 1979 March 11.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1991,
       volume = {19},
       number = {3},
        pages = {208},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1991BASI...19..208S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1991BASI...19..208A,
       author = {{Ambastha}, A.},
        title = "The large two-ribbon flare of 1990 March 28.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1991,
       volume = {19},
       number = {3},
        pages = {208-209},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1991BASI...19..208A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1991BASI...19..215A,
       author = {{Ambastha}, Ashok and {Bhatnagar}, Arvind and {Jain}, Rajmal and {Srivastava}, Nandita and {Gupta}, Sudhir and {Sharma}, Richa and {Agrawal}, Gopal and {Kumawat}, Vishnu and {Hill}, Frank and {Fischer}, George},
        title = "GONG site evaluation program at Udaipur Solar Observatory",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1991,
       volume = {19},
       number = {3-4},
        pages = {215-233},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1991BASI...19..215A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1991SoPh..133..339S,
       author = {{Srivastava}, N. and {Ambastha}, A. and {Bhatnagar}, A.},
        title = "Evolution of helically twisted prominence structures of March 11, 1979",
      journal = {\solphys},
         year = 1991,
       volume = {133},
       number = {2},
        pages = {339-355},
          doi = {10.1007/BF00149893},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1991SoPh..133..339S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1989sasf.confP.207B,
       author = {{Bhatnagar}, A. and {Ambastha}, A. and {Jain}, R.~M. and {Srivastava}, N.},
        title = "On impulsive and gradual optical solar flares.",
    booktitle = {Solar and Stellar Flares. Poster Papers},
         year = 1989,
        pages = {207-210},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1989sasf.confP.207B},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@PROCEEDINGS{1988issa.conf.....B,
        title = "Proceedings of the Indo-US Workshop on Interplanetary Scintillations and Solar Activity",
    booktitle = {Proceedings of the Indo-US Workshop on Interplanetary Scintillations and Solar Activity},
         year = 1988,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1988issa.conf.....B},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@INPROCEEDINGS{1988ESASP.286..209H,
       author = {{Hill}, F. and {Ambastha}, A. and {Ball}, W. and {Duhalde}, O. and {Farris}, D. and {Fischer}, G. and {Hieda}, L. and {Zhen}, Huang and {Ingram}, B. and {Jackson}, P. and {Jones}, H. and {Jones}, W. and {Kennewell}, J. and {Kunkel}, W. and {Kupke}, R. and {Labonte}, B. and {Leibacher}, J. and {Libbrecht}, K. and {Lu}, W. and {Morrison}, L. and {Odell}, C. and {Pall{\'e}}, P. and {Sa{\'a}}, O. and {Sousa}, E. and {Stebbins}, T. and {Xiao}, Suming and {GONG Site Survey Team}},
        title = "The GONG site survey.",
    booktitle = {Seismology of the Sun and Sun-Like Stars},
         year = 1988,
       editor = {{Rolfe}, E.~J.},
       series = {ESA Special Publication},
       volume = {286},
        pages = {209-215},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1988ESASP.286..209H},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1988JApA....9..137A,
       author = {{Ambastha}, Ashok and {Bhatnagar}, Arvind},
        title = "Sunspot proper motions in active region NOAA 2372 and its flare activity during SMY period of 1980 April 4-13",
      journal = {Journal of Astrophysics and Astronomy},
         year = 1988,
       volume = {9},
        pages = {137-154},
          doi = {10.1007/BF02715059},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1988JApA....9..137A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1988BASI...16...84A,
       author = {{Ambastha}, A.},
        title = "Umbral solar flares.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1988,
       volume = {16},
        pages = {84-85},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1988BASI...16...84A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1988KodOB...9..201A,
       author = {{Ambastha}, Ashok},
        title = "Reduction of photoheliograms by IMB-PC controlled digitizer.",
      journal = {Kodaikanal Observatory Bulletins},
         year = 1988,
       volume = {9},
        pages = {201-204},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1988KodOB...9..201A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1987BASI...15...19A,
       author = {{Ambastha}, A. and {Bhatnagar}, A.},
        title = "Sunspot Motion in NOAA:2372 and Associated Flare Activity during Solar Maximum Year Period 1980APR4-13",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1987,
       volume = {15},
        pages = {19},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1987BASI...15...19A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@BOOK{1985pasc.book.....A,
       author = {{Ambastha}, Ashok and {Bhatnagar}, A.},
        title = "Photographic atlas of the solar chromosphere",
         year = 1985,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1985pasc.book.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1984JApA....5..285A,
       author = {{Ambastha}, A.},
        title = "Stability of a finite disc under the influence of a spherical halo",
      journal = {Journal of Astrophysics and Astronomy},
         year = 1984,
       volume = {5},
        pages = {285-306},
          doi = {10.1007/BF02714545},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1984JApA....5..285A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1983ApJ...264..413A,
       author = {{Ambastha}, A. and {Varma}, R.~K.},
        title = "On the global density waves in self-gravitating flat disks",
      journal = {\apj},
         year = 1983,
       volume = {264},
        pages = {413-426},
          doi = {10.1086/160608},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1983ApJ...264..413A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1982JApA....3..125A,
       author = {{Ambastha}, A. and {Varma}, R.~K.},
        title = "Global stability of disk-bulge systems - Spiral structure of disk galaxies",
      journal = {Journal of Astrophysics and Astronomy},
         year = 1982,
       volume = {3},
        pages = {125-144},
          doi = {10.1007/BF02714797},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1982JApA....3..125A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1982BASI...10...40A,
       author = {{Ambastha}, A. and {Varma}, R.~K.},
        title = "Global density waves in self gravitating flat disks.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1982,
       volume = {10},
        pages = {40},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1982BASI...10...40A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1982BASI...10...39A,
       author = {{Ambastha}, A. and {Varma}, R.~K.},
        title = "Global spiral waves in disk-bulge systems.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1982,
       volume = {10},
        pages = {39-40},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1982BASI...10...39A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@BOOK{1982bhac.book.....A,
       author = {{Ambastha}, A. and {Mohan}, M.},
        title = "Black Holes and Astrophysics: Compilation of Vikram Sarabhai Memorial Lectures of Prof. S. Chandrasekhar",
         year = 1982,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1982bhac.book.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@PHDTHESIS{1981PhDT........95A,
       author = {{Ambastha}, Ashok},
        title = "A Study on the Dynamics of Gravitational Systems",
       school = {Gujarat University, India},
         year = 1981,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1981PhDT........95A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@PROCEEDINGS{1981apda.conf.....A,
        title = "Astrophysical Problems-A dynamical Approach: Compilation of Lectures of Prof. I.P. Williams",
    booktitle = {Astrophysical Problems-A dynamical Approach: Compilation of Lectures of Prof. I.P. Williams. Publication of the Physical Research Laboratory},
         year = 1981,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1981apda.conf.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1981BASI....9...80A,
       author = {{Ambastha}, A. and {Verma}, R.~K.},
        title = "Global spiral density waves in disk galaxies.",
      journal = {Bulletin of the Astronomical Society of India},
         year = 1981,
       volume = {9},
        pages = {80},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1981BASI....9...80A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@PROCEEDINGS{1978ppa..conf.....M,
        title = "Plasma Physics and Astrophysics: Compilation of Lectures of Prof. D. ter Haar",
    booktitle = {Plasma Physics and Astrophysics: Compilation of Lectures of Prof. D. ter Haar},
         year = 1978,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1978ppa..conf.....M},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@ARTICLE{1978Ap&SS..55..459A,
       author = {{Ambastha}, A. and {Varma}, R.~K.},
        title = "Accretion-Induced Overstability of Density Waves in a Self-Gravitating Disk",
      journal = {\apss},
         year = 1978,
       volume = {55},
       number = {2},
        pages = {459-473},
          doi = {10.1007/BF00642270},
       adsurl = {https://ui.adsabs.harvard.edu/abs/1978Ap&SS..55..459A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@MISC{1977gkt..rept.....A,
       author = {{Ambastha}, A.},
        title = "Gravitational Kinetic Theory : Compilation of Lectures of Prof. George Severne)",
 howpublished = {Gravitational Kinetic Theory : Compilation of Lectures of Prof. George Severne), Publication of the Physical Research Laboratory, Ahmedabad, India, 1977},
         year = 1977,
       adsurl = {https://ui.adsabs.harvard.edu/abs/1977gkt..rept.....A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}


