Nilakshi; Yadav, R. K. S.; Mohan, V.; Pandey, A. K.; Sagar, R.
(1999)
The CCD magnitudes in Johnson BV and Cousins RI photometric passbands are determined for 18 stars in the field of GRB 990123. These measurements can be used in carrying out precise CCD photometry of the optical transient ...