GCN Circular 16779
Subject
GRB 140903A: ISON-Kislovodsk observations
Date
2014-09-05T04:11:18Z (10 years ago)
From
Alexei Pozanenko at IKI <alex@grb.rssi.ru>
A. Pozanenko (IKI), A. Volnova (IKI), N. Polyakov (ISON), E. Romas (ISON), I. Molotov (KIAM), report on behalf of larger collaboration:
We observed the field of GRB 140903A (Cummings et al., GCN 16763) with Santel-400AN telescope of ISON-Kislovodsk observatory starting on Sep. 03 (UT) 18:54:36. In the enhanced XRT position (De Pasquale et al., GCN 16767) we do not detect the object (Capone et al., GCN 16769; Cenko et al., GCN 16770; Fruchter, GCN 16776). A preliminary upper limit after subtraction of the nearby bright star is 16m. A formal upper limit of a point-like source in the image away of the bright nearby star is following
Date UT start t-T0 Filter Exp. UL(3 sigma)
(mid, days) (s)
2014-09-03 18:22:05 0.14057 None 100 18.6
The photometry is based on SDSS stars
SDSS J155213.13+273321.7 R_Lupton 15.392 ± 0.013
SDSS J155218.31+273433.5 R_Lupton 14.792 ± 0.013
SDSS J155155,39+273948,9 R_Lupton 15.421 ± 0.013