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GCN Circular 12830

Subject

GRB 120106A: optical upper limit

Date

2012-01-12T14:38:43Z (12 years ago)

From

Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>

A. Volnova (SAI MSU), E. Litvinenko (UBAI), A. Pozanenko (IKI) on behalf of 
larger GRB follow up collaboration report:

We observed the field of the Swift GRB 120106A (Beardmore  et al., GCN 
12810Not found
 
 
) with ORI-40 telescope of Kitab ISON observatory on Jan. 6 starting on 
(UT) 18:49:24. We obtained several unfiltered images between (UT) 18:49:24 - 
19:20:20.  On the stacked image we do not detect any source within the 
enhanced XRT error box (Evans et al., GCN  12813Not found
 
 
). The photometry is based 
on nearby  reference stars of USNO-B1.0 (R2 magnitudes):

 Tstart UT, T0+,       Filter, Exposure, OT, UL (3 sigma)
                 (mid, d)             (s)

 18:49:24  0.2003    none  30*60       n/d  18.5