[AAVSO-HEN] GRB 090516, RIMOTS optical upper limits

[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:  9391
SUBJECT: GRB 090516, RIMOTS optical upper limits
DATE:    09/05/18 13:29:42 GMT
FROM:    Norisuke Ohmori at Miyazaki U  <ohmori at astro.miyazaki-u.ac.jp>

N. Ohmori, E. Sonoda, K. Kono, H. hayasi,
A. Daikyuji, Y. Nisioka, K. Noda, M. Yamauchi
(University of Miyazaki)

We have observed the field covering the error circle of
GRB090516 (Swift trigger 352190, GCN 9374, Rowlinson et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 11:16:08 UT (1.8 hr after the Swift trigger),
under cloudy condition.
First image was obtained at 11:17:11 UT (1.8 hr after the Swift trigger).

We have compared our data of 30 sec exposures with the USNO-A2.0 catalog.
There is no new source at the reported position.
(GCN 9374, B. A. Rowlinson et al. GCN 9375, C. Guidorzi et al. 
 GCN 9376, A. P. Beardmore et al. GCN 9379, J. Gorosabel et al. 
 GCN 9381, A. de Ugarte Postigo et al.)

the upper limits are as follows:
---------------------------------------------------------------
Start(UT)  End(UT) Num. of frames Limit (mag.)
---------------------------------------------------------------
11:16:08   11:17:11         1         15.6
11:16:08   12:04:00        21         17.7
---------------------------------------------------------------