GCN Circular 12059
Subject
GRB 110530A: optical observations at Mt. Terskol, second epoch
Date
2011-06-01T20:03:28Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
M. Andreev, A. Sergeev, I. Sokolov (Terskol Branch of Institute of
Astronomy), Yu. Bronich (IC AMER of NASU), A. Pozanenko (IKI) on behalf of
larger GRB follow up collaboration report:
We observed the optical afterglow of the Swift GRB 110530A (D'Avanzo et
al, GCN 12046) with Zeiss-2000 telescope of Mt.Terskol observatory On May,
31 between (UT) 21:41-22:11. At the place of optical afterglow we detect
extended object (elongated from SE to NW) with brightness R(gunn) ~ 22.7
calibrated against the star USNO-B1.0 1519-0265568 (RA=18 48 15.86, Dec=+61
56 15.0) and assuming R=16.08.
Coordinates of South-East part of the extended object are (J2000) 18 48
16.27 +61 55 45.3 which is ~2" apart from position of the optical
afterglow (J2000) 18 48 16.39 +61 55 45.16 obtained in our first epoch
observations (Andreev et al. GCN 12052). The accuracy of astrometry is
about 0.7" in both coordinates. One can suggest the extended object might
be a bright host of GRB 110530A.
The finding chart can be found at
http://grb.rssi.ru/GRB110530A/grb110530_2m110531.jpg
