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Title: Optical follow up of the GRB 990123 sources from UPSO, Naini Tal
Authors: Sagar, R.
Pandey, A.K.
Mohan, V.
Yadav, R.K.S.
Bhattacharya, D.
Castro-Tirado, A.J.
Issue Date: 1999
Publisher: The Astronomical Society of India
Citation: Bulletin of the Astronomical Society of India, 1999, Vol.27, p3-7
Abstract: The CCD magnitudes in Johnson $BV$ and Cousins R photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after trigger of the gamma-ray burst. BVR photometric light curves are obtained by combining the published data with the present measurements. They indicate that the flux decay constants in BV and R passbands are almost the same. Its value is $1.1\pm 0.06$. Such decay is quite consistent with the fireball models for the optical transient.
ISSN: 0304-9523
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Copyright: (1999) by the Astronomical Society of India. Scanned images provided by the NASA ADS Data System.
Appears in Collections:Research Papers (A&A)

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