[vsnet-grb-info 6039] GRB 080503: MITSuME Ishigakijima optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7676
SUBJECT: GRB 080503: MITSuME Ishigakijima optical upper limits
DATE:    08/05/04 03:04:00 GMT
FROM:    Nobuyuki Kawai at Tokyo Tech  <nkawai at hp.phys.titech.ac.jp>

D. Kuroda, K. Yanagisawa (NAOJ) and N. Kawai (Tokyo Tech) report on
behalf of the MITSuME collaboration: 

We observed the error box of GRB 080503 (Mao et al. GCN 7665) with the
3-color 105cm Telescope at Ishigakijima Astronomical Observatory
starting at 2008-05-03 13:49:55 UT, 1.4 hours after the trigger.
In the co-added images of Ic, Rc, and g' bands, we did not detect any
afterglow candidate.  The 3-sigma limiting magnitudes based on
USNO-B1.0 (I-band) and NOMAD (R-band,g'-band) stars are following.

Filter  start (UT)  end (UT)    Exposure   LimitMag
---------------------------------------------------
g'      13:49:55    13:59:19    9 x 60 s     20.5
Rc      13:49:55    13:59:19    9 x 60 s     20.2
Ic      13:49:55    13:59:19    9 x 60 s     20.1
----------------------------------------------------