GCN Circular 16151
Subject
GRB 140423A: KWFC z-band photometry
Event
Date
2014-04-23T13:55:20Z (12 years ago)
From
Nozomu Tominaga at Konan U <tominaga@konan-u.ac.jp>
Hiroyuki Maehara (Univ. of Tokyo), Nozomu Tominaga (Konan Univ.), Tomoki Morokuma (Univ. of Tokyo) and Masaomi Tanaka (NAOJ) on
behalf of OISTER collaboration:
We observed the field of GRB 140423A (Sonbas et al., GCN 16142) with the 1.05-m Schmidt telescope and KWFC (Sako et al. 2012, Proc.
SPIE 8446, 84466L) at Kiso Observatory in Japan.
The observation was made in the Sloan z-band at 2014-04-23 10:30 (UT), approximately 2 hours post burst.
We have also detected the optical source (Elenin et al., GCN 16143, 16148; Kaur et al. GCN 16144; Ferrante et al., GCN 16145;
Chester et al., GCN 16147) at RA=13:09:08.54, DEC=+49:50:29.3 (J2000).$B!!(BPreliminary photometry of the source is as follows.
obs. date (mid time) Tmid-T0 (hr) exp. time filter mag limiting mag
2014-04-23 10:30:11 1.97 300 sec z 18.6+/-0.1 19.5
The photometry is based on z-mag of SDSS stars in the observed field.