Optical follow up of the GRB 990123 source from UPSO, Nainital
Sagar, R. · Pandey, A. K. · Mohan, V. · Yadav, R. K. S. · Nilakshi · Bhattacharya, D. · Castro-Tirado, A. J.
Original · EN
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± 0.06. Such decay is quite consistent with the fireball models for the optical transient.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.