GCN Circular 11889
Subject
GRB 110402A: fading optical afterglow
Date
2011-04-06T17:50:56Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), A. Pozanenko (IKI), A. Volnova (SAI MSU) on behalf of
larger GRB follow up collaboration report:
We observed the field of GRB 110402A (Ukwatta et al. GCN 11857) with Shajn
telescope of CrAO observatory on Apr. 3 between (UT) 18:41 and 19:59 under
seeing of about 2.6 arsces. We took several frames with exposure of 60s in
R-band. On a stacked image we detected the optical counterpart (Mundell et
al. GCN 11858, Leloudas et al. GCN 11859). The counterpart has coordinates
(J2000) RA = 13h 09m 36.63s, Dec = +61d 15' 09.5'' with uncertainty of 0.1"
in both coordinates which are fully compatible with initial counterpart
coordinates (Mundell et al. GCN 11858). The photometry is based on the USNO
B1.0 star 1512-0199231 (13 09 43.16 +61 14 38.5) assuming R=16.71.
T0+ Filter, Exposure, mag. uplim (3 sigma)
(mid, d) (s)
1.79672 R 73x60 23.11+/-0.12 24.4