[AAVSO-HEN] GRB 070521, optical observation

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  6453
SUBJECT: GRB 070521, optical observation
DATE:    07/05/22 10:20:04 GMT
FROM:    Shouta Maeno at U.of Miyazaki  <shouta at astro.miyazaki-u.ac.jp>

S.Maeno, R.Hara, H.Tanaka, E.Sonoda, M.Yamauchi
(University of Miyazaki)


We have observed the field of GRB 070521 (GCN 6431) with
the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki.
The observation was started from 11:47:35 UT
on May 21(4.9 h after the trigger).
After co-adding a set of 32 images (11:47:35 - 12:46:04 UT) of 30 sec 
exposures, we have compared with the USNO A2.0 catalog.
Preliminary analysis shows there is no new source brighter
than 17.8mag.