GCN Circular 12736
Subject
GRB 111205A: optical observations
Date
2011-12-28T09:04:33Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), A. Volnova (SAI MSU), A. Pozanenko (IKI) report on
behalf of larger GRB follow-up collaboration:
We observed the field of IPN of hard intense GRB 111205A (Hurley et al.,
GCN 12626; Golenetskii et al., GCN 12627) with 0.45-m telescope If ISON-NM
observatory on Dec 8 (09:55:52 - 11:52:34 UT). We took several unfiltered
images of 300 s exposure. All our images cover full IPN error box. On a
stacked image we do not find any new objects within IPN error box in
comparison with DSS. We detect DSS source mentioned by Wolf & Hoversten in
the XRT error circle (Wolf & Hoversten, GCN 12630). However due to bad
seeing we cannot resolve this source into separate sources of a double star
(Kann et al., GCN 12636).
Photometry of the unresolved source based on several nearby USNO-B1.0 stars
(R2 magnitudes) is the following:
t-t0 filter Exp. source uplim (3 sigma)
(mid, days) (s)
2.90513 none 21x300 15.40 +/- 0.05 19.8