GCN Circular 1515
Subject
GRB 020812: early time optical observation at Ouda Station
Date
2002-08-21T05:13:06Z (23 years ago)
From
Taichi Kato at Kyoto U <tkato@kusastro.kyoto-u.ac.jp>
H. Ohashi, T. Kato, T. Senda, H. Mii, K. Mizuno, Y. Yasaka (Kyoto U)
and H. Yamaoka (Kyushu U) report on behalf of VSNET-grb collaboration:
"We have performed a full analysis of the R band images of GRB 020812
field taken at Ouda (GCN 1469). Three fields of view (14 arcminutes
square) were observed, each of which covered a part of HETE WXM error
box (GCN 1468) (http://www.rc.kyushu-u.ac.jp/~yamaoka/GRB020812/FOVouda.gif).
The limiting magnitudes are measured by compareing with USNO-A2.0 red
magnitudes. "Coverage" shows the percentage of covered area of the
HETE WXM error box.
FOV 1 2 3
center 20:38:28.8 20:38:21.0 20:38:53.3 R.A.
(J2000) -05:17:58 -05:17:24 -05:23:45 Dec.
epoch 11:08-12:03 12:05-13:27 13:34-16:59 Aug. 12 UT +
exp. 38 73 156 minutes
lim.mag 18.9 20.2 21.2 in R
coverage 48% 30% 58%
remark twilight
By the comparison with DSS 2 red image, no new source brighter than
the limit of DSS 2 is detected.
This message may be cited.