GCN Circular 9330
Subject
GRB 090408: optical upper limit
Date
2009-05-09T20:55:42Z (15 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
D. Shakhovskoy, V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the Swift GRB 090408 (Swift trigger=348720; Stroh et al., GCN
9110) in R-filter on Apr. 8 with AZT-11 telescope of CrAO. We do not
detect any new object within BAT erorr box (Stroh et al., GCN 9110) in a
stacked image in R at ~ 3.7 hrs after burst onset. An upper limit
photometry of combined images based on USNO B1.0 1275-0286482
RA(J2000)=15:26:27.78 Dec(J2000)= +37:33:46.2 R =17.55 is following:
T0+ Filter, Exposure, mag., err.
(d) (s)
0.1561 R 20x180 > 20.4 (3sigma)