[vsnet-grb-info 11809] GRB 120402A: optical upper limit
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Apr 4 03:48:57 JST 2012
TITLE: GCN CIRCULAR
NUMBER: 13200
SUBJECT: GRB 120402A: optical upper limit
DATE: 12/04/03 18:48:49 GMT
FROM: Alina Volnova at SAI MSU <alinusss at gmail.com>
A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A.
Pozanenko (IKI) on behalf of larger GRB follow up collaboration
report:
We observed the field of the possible GRB 120402A (Swift
trigger=519207; Barthelmy et al., GCN 13190) with ORI-40 telescope of
Kitab ISON observatory on Apr. 02 starting (UT) 22:55:14, i.e. ~6 min
after burst trigger. We obtained several unfiltered images with
exposure of 60 seconds. Within BAT error circle of 3 arcmin, radius
(Barthelmy et al., GCN 13190) we do not detect apparently new source
in comparison with DSS2-red. The photometry is based on USNO-B1.0
reference star 1092-0548647 (20:57:27.42 +19:17:47.2) assuming R =
14.41.
Tstart UT, T0+, Filter, Exposure, OT, UL (3 sigma)
(mid, d) (s)
22:55:14 0.01449 none 2800 n/d 19.8
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