[AAVSO-HEN] GRB 080310: GAO 150cm telescope 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:  7413
SUBJECT: GRB 080310: GAO 150cm telescope Optical Observation
DATE:    08/03/12 14:09:55 GMT
FROM:    Kenzo Kinugasa at Gunma Astro. Obs/Japan  <kinugasa at astron.pref.gunma.jp>

K. Kinugasa (Gunma Astronomical Observatory)  report:

 The position of GRB 080310 (Chornock et al. GCN 7381;
Cummings et al., GCN 7382)  was observed with the 150 cm
telescope of Gunma Astronomical Observatory.
Starting at 15:09 and 18:01 UT (6.5 and 9.4 hours after
the burst), Rc and Ic frames were acquired for sets of
5 x 3-min and  5 x 3-min exposures.

 We clearly detected the optical counterpart in all frames.
We estimated the R magnitute below and confirmed the fading
trend. The decay index of single power-law is consistent
with the result reported by Urata et al. (GCN 7412).


mid-UT     exp           Rc
-----------------------------------
15:18:50   5 x 3-min     20.1+-0.1
18:09:42   5 x 3-min     20.5+-0.1
-----------------------------------