GCN Circular 13520
Subject
GRB 120724A: optical observation in Maidanak observatory
Date
2012-07-26T19:48:38Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), A. Sergeev (Institute of Radio Astronomy of NASU), A.
Volnova (SAI MSU), O. Burhonov (UBAI), I. Molotov (KIAM) report on behalf
GRB follow-up collaboration:
We observed the field of Swift GRB 120724A (D'Avanzo et al., GCN 13510)
with AZT-22 telescope of Maidanak observatory starting on Jul. 24 (UT)
15:55:51 under mean seeing (FWHM) of about 1.1 arcsec. Totally we obtained 4
images of 600 s exposure in R filter. At the edge of the enhanced XRT
position (Goad et al., GCN 13515) we detected the object with coordinates
(J2000) 16 20 43.28 +03 30 27.1 (uncertainty of 0.12 arcsec in both
coordinates), which is slightly apart from coordinates of the OT reported
earlier (Guidorzi et al., GCN 13511; Holland et al., GCN 13516). Since the
object is also visible in stacked DSS images (R+I) we suggest it is a
possible host galaxy of GRB 120724A.
A preliminary photometry of the object is based on USNO-B1.0 nearby stars:
T0+ Filter, Exposure, OT
(mid, d) (s)
0.42252 R 3x600 20.97 +/- 0.09
A finding chart can be found at
http://grb.rssi.ru/GRB120724A/GRB120724A_AZT22&DSS.png