GCN Circular 17670
Subject
GRB 150323C: additional optical observations in Mondy
Event
Date
2015-04-04T11:16:29Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Volnova (IKI), E. Klunko (ISTP), I. Korobtsev (ISTP),
M. Eselevich (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We additionally observed the field of the GRB 150323C (Amaral-Rogers et
al., GCN 17621) with AZT-33IK telescope of Sayan observatory (Mondy) on
Mar., 27 and Mar. 30 under good weather conditions and mean FWHV of 1.8
arcsec. We obtained several images in R-filter of 120 s exposure. In both
epochs we detect a source in coordinates (J2000) 12 50 27.90 +50 11 29.0
(+/- 0.45" ) which is within afterglow coordinates (Xu et al., GCN 17625)
and within the enhanced Swift-XRT position (Osborne et al., GCN 17633). Our
object is apparently the same object suggested as a possible host galaxy
(Malesani et al., GCN 17655). Preliminary photometry of the source is
following
Date UT start t-T0 Filter Exp. OT Err.
(mid, days) (s)
2015-03-27 18:22:30 4.11333 R 85*120 22.7 0.25
2015-03-30 14:09:29 7.02068 R 194*120 22.3 0.15
Photometry is based on SDSS DR9 stars:
SDSS9_id R(Lupton)
J125023.08+501048.2 16.84
J125032.04+501021.5 18.37
Also we note that our photometry reported early (Mazaeva et al., GCN 17639)
may by significantly be significantly influenced by the possible host
galaxy.