GCN Circular 10634
Subject
GRB 100418A: optical observations
Date
2010-04-20T15:55:58Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev, D. Shakhovkoy (CrAO), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of the Swift GRB 100418A (Marshall et al. GCN 10612)
with AZT-11 telescope of CrAO between (UT) Apr. 19 01:26 -- 01:54 under
poor seeing of about 4 arcsec. The optical afterglow (Marshall et al. GCN
10612, Filgas et al. GCN 10617) is clearly detected in enhanced XRT error
circle (Osborne et al. GCN 10614). The coordinates of the afterglow are
(J2000) RA= 17:05:27.08 Dec= +11:27:42.3
The photometry of the afterglow in a stacked image based on USNO-B1.0 star
1014-0271368 (RA(J2000) = 17:05:26.42 Dec(J2000)= +11:27:32.9) assuming
R=17.32 is following:
T0+ Filter, Exposure, mag.
(mid, d) (s)
0.1883 R 9x180 18.54 +/-0.03
A finding char can be found at
http://grb.rssi.ru/GRB100418A/GRB100418a_100418_R_azt11.gif
