[vsnet-grb-info 15192] GRB 140629A: KWFC z-band photometry

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16484
SUBJECT: GRB 140629A: KWFC z-band photometry
DATE:    14/06/29 21:41:04 GMT
FROM:    Daisuke Kuroda at OAO/NAOJ  <dikuroda at oao.nao.ac.jp>

Hiroyuki Maehara (Univ. of Tokyo) reports on behalf of the OISTER collaboration:

We observed the field of GRB 140629A (Lien et al. GCN 16477) with the 1.05-m
Schmidt telescope and KWFC (Sako et al. 2012, Proc. SPIE 8446, 84466L) at
Kiso Observatory in Japan. The observations were made in the Sloan z-band at
2014-06-29 14:30-14:39 (UT; 13-22 min post burst) and 16:30-16:45 (133-148
min post burst).

We detected an uncatalogued fading source at RA=16:35:54.45, DEC=+41:52:36.6
(equinox 2000.0; uncertainty 0".3).$B!!(BPreliminary photometry of the source
is as follows:

obs. date (mid time)  t-T0 (days)  exp.(sec)  filter  mag           limiting mag
2014-06-29 14:30:30   0.0090       180 sec    z       14.89+/-0.02  19.4
           14:34:47   0.0120       180        z       15.23+/-0.02  19.4
           14:39:05   0.0150       180        z       15.50+/-0.02  19.4
           16:30:34   0.0924       180        z       17.68+/-0.06  19.1
           16:34:52   0.0954       180        z       18.01+/-0.08  19.1
           16:45:18   0.1026       180        z       17.87+/-0.08  18.9

The photometry is based on z-mag of SDSS stars in the observed field.