[vsnet-grb-info 3188] GRB060428B, optical observation

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5023
SUBJECT: GRB060428B, optical observation
DATE:    06/04/28 15:08:51 GMT
FROM:    Eri Sonoda at U of Miyazaki/Japan  <sonoda at astro.miyazaki-u.ac.jp>

E.Sonoda,S.Maeno,M.Yamauchi
(University of Miyazaki)


  We have observed the field covering the error circle of
GRB060428B (GCN 5017) with the unfiltered CCD camera on
the 30-cm telescope at University of Miyazaki.
The observation was started 12:02:52 UT, ~3.14 hour
after the Swift trigger time.

  We have compared our data of 30 sec exposures
with the USNO-A2.0 catalog, there is no new source
at the position reported by P.A.Price et al.(GCN 5019).

The upper limits are as follows:
--------------------------------------------------------------
Start(UT)	End(UT)	    Num. of frames	Limit (mag.)	
--------------------------------------------------------------
12:02:52	12:11:28	8		~12.8
12:11:52	12:41:28	24		~16.9
12:42:56	12:47:02	4		~17.9
---------------------------------------------------------------