Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 12900

GRB 120118B: optical upper limit
2012-01-27T09:43:39Z (12 years ago)
Alina Volnova at SAI MSU <>
A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A.
Pozanenko (IKI) on behalf of  larger GRB follow up collaboration

 We observed the field of the Swift GRB 120118B (Littlejohns et al.,
 GCNs 12852, 12854) with ORI-40 telescope of Kitab ISON observatory on
 Jan. 18 between (UT) 17:39:55 and 18:10:51. We obtained several
 unfiltered images with exposure of 60 seconds. On the stacked image we
 do not detect a source reported by D'Avanzo et al. (GCN 12870). The
 photometry is based on nearby reference stars of USNO-B1.0 (R2

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

 17:39:55     0.03127   none   26x60      n/d   19.5
Looking for U.S. government information and services? Visit