GCN Circular 15485
Subject
GRB 131108A: ISON Blagoveshensk upper limit
Date
2013-11-14T06:21:44Z (11 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A. Volnova (IKI), D. Varda (ISON), E. Sinyakov (ISON), I. Molotov
(KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the field of GRB 131108A (Racusin et al., GCN 15464,
Hurley et al., GCN 15466) with ORI-25 telescope of ISON-Blagoveshensk
observatory starting Nov., 9 (UT) 16:40:45. We took several unfiltered
images with exposures of 30 seconds. In the combined images in the
enhanced XRT circle (Stroth & Kennea, GCN 15474) we do not detect the
OT reported by Gorosabel et al. (GCN 15469).
The details of the photometry are the following:
UT start t-T0 Filter Exp. OT UL (3sigma)
(mid, days) (s)
16:40:45 0.85072 None 95x30 n/d 17.1
The photometry is based on a nearby bright SDSS star, R (gri -> R
transformations by Lupton 2005):
SDSS id R
J102613.43+094109.5 13.318 +/- 0.013