GCN Circular 29254
Subject
GRB 210104A: DOAO optical afterglow observations
Event
Date
2021-01-05T03:31:37Z (6 years ago)
From
Gregory SungHak Paek at SNU <shpaek@astro.snu.ac.kr>
Gregory S.H. Paek (SNU ARC/SNU), Myungshin Im (SNU ARC/SNU), Taewoo Kim,
and Wonseok Kang (DOAO) on behalf of a larger collaboration
We observed the optical counterpart of GRB 210104A (E. Troja et al.,
GCN #29233)
with the 1-m class telescope in Deokheung Optical Astronomy Observatory
(DOAO). We calibrated flux with the SDSS catalog and used an AB magnitude
system.
----------------------------------------------------------
Filter Date-obs[UT] Exp.time[s] Mag Mag Error
----------------------------------------------------------
R 2021-01-04T13:37:29.100 300*4 18.34 0.07
I 2021-01-04T13:42:37.050 300*4 18.04 0.05
----------------------------------------------------------
The magnitudes are not corrected for galactic extinction.