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Optical Observations of GRB 050401 Afterglow : A case for Double Jet Model
Atish Kamble, Kuntal Misra, D. Bhattacharya +1
The afterglow of GRB 050401 presents several novel and interesting features : [1] An initially faster decay in optical band than in X-rays. [2] A break in the X-ray light curve aft…
The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125
Adria C. Updike, Joshua B. Haislip, Melissa C. Nysewander +52
We report on multi-wavelength observations, ranging from the X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the prese…
Photometric and Spectroscopic study of a highly reddened type Ia supernova SN 2003hx in NGC 2076
Kuntal Misra, D. K. Sahu, G. C. Anupama +1
We present CCD photometry and optical spectra of the type Ia supernova SN 2003hx which appeared in the galaxy NGC 2076, obtained till 146 days after the epoch of …
Multiwavelength analysis of the intriguing GRB 061126: the reverse shock scenario and magnetization
A. Gomboc, S. Kobayashi, C. Guidorzi +30
We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multi-color optical imaging from ten ground-based telescopes. G…
Observations of the Optical Afterglow of GRB 050319 : Wind to ISM transition in view
Atish Kamble, L. Resmi, Kuntal Misra
The collapse of a massive star is believed to be the most probable progenitor of a long GRB. Such a star is expected to modify its environment by stellar wind. The effect of such a…
The dark nature of GRB 051022 and its host galaxy
A. J. Castro-Tirado, M. Bremer, S. McBreen +17
We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 hours and ~1.15 yr after the event. It is the most intense gamma-ray burs…
Type IIP Supernova SN 2004et: A Multi-Wavelength Study in X-Ray, Optical and Radio
Kuntal Misra, Dave Pooley, Poonam Chandra +4
We present X-ray, broad band optical and low frequency radio observations of the bright type IIP supernova SN 2004et. The \cxo observed the supernova at three epochs, and the optic…
Optical observations of GRB 060124 afterglow: A case for an injection break
Kuntal Misra, D. Bhattacharya, D. K. Sahu +5
We present broad band optical afterglow observations of a long duration GRB 060124 using the 1.04-m Sampurnanand Telescope at ARIES, Nainital and the 2.01-m HCT at IAO, Hanle, incl…
Optical Observations and Multiband Modelling of the Afterglow of GRB 041006: Evidence of A Hard Electron Energy Spectrum
Kuntal Misra, L. Resmi, S. B. Pandey +2
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy…
Multiband Optical Photometry and Bolometric Light Curve of the Type Ia Supernova 2004S
Kuntal Misra, Atish P. Kamble, D. Bhattacharya +1
We present broad band CCD photometry of the Type Ia supernova SN 2004S, which appeared in the galaxy MCG-05-16-021, obtained during 2004 February 12 to March 22.…