|The revised INTEGRAL error circle of GRB030131 imaged February 1, 2003
03:49-04:52 UT through Rc filter.
Copyright: Nyrölä Observatory, 2003
The optical afterglow suspect reported in the following GCN was not real. The followup circulars (GCN 1950, 1951 and 1952) confirmed that there was no optical transient at the position shown in our images. The faint star-like object is most probably a processing artifact.
TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1849 SUBJECT: GRB 030131: afterglow candidate DATE: 03/02/03 19:41:56 GMT FROM: Arto Oksanen at Nyrola Obs., Finland
A. Oksanen (Jyvaskylan Sirius ry) reports on behalf of Nyrola Observatory GRB-team and AAVSO International GRB Network: A 24 x 16 arcmin field covering the corrected INTEGRAL error circle of GRB 030131 (GCN 1848) was imaged with the 0.4m SCT at the Nyrola Observatory starting at February 1, 2003 03:49 UT, 20 hours after the burst. The 19 x 180s Rc-exposures were sigma reject combined and compared to the Digitized Sky Survey (DSS2R) and one faint (R=20.5) new object was found near the image limit. The position of the suspect is: 13:28:28.46 +30:42:05.4 J2000 using the USNO-A2.0 reference catalog. The combined image may contain some processing artifacts so the confidence that the suspect is a GRB OT is not very high. The FITS frame and a JPEG picture showing the corrected error circle plus the suspect OT are available on: http://nyrola.jklsirius.fi/grb/grb030131/ This message may be cited.