Optical afterglow observations of GRB 021004 and GRB 030226

Abstract

Optical photometric observations of GRB 021004 and GRB 030226 afterglows in BVRI and UBRI passbands respectively [2, 3] were carried out the 1.04-m Telescope of the ARIES, Naini Tal and the 2.01-m Telescope at the Indian Astronomical Observatory, Hanle, India. Published photometric data for both the GRBs in literature were also used after putting them on the same photometric scale to reproduce the afterglow light-curves (LCs). We used our photometric calibration for both the GRBs to correct for inconsistencies between different photometric. For both the GRB fields we have long temporal coverage and our data fill in the gaps (See Figure 1) in the LCs.