Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 11822

GRB110318B : MOA optical upper limit
2011-03-25T16:40:17Z (13 years ago)
Suzuki Daisuke at MOA-II <>
D. Suzuki (STE Lab. Nagoya Univ.), P.J. Tristram (Mt. John University
S. Kobara, K. Omori, H. Naito and T. Sako (STE Lab. Nagoya Univ.)
on behalf of the MOA Collaboration report :

We searched for an optical afterglow of GRB110318B (GCN 11799, R. Margutti
et al.)
starting from 15:40 UT on 2011 March 18 (13 minutes after the burst)
with the MOA-II 1.8m telescope at Mt.John observatory in New Zealand.
In a single image of a 60 sec exposure with a wideband Red filter (center
wavelength ~ 750nm and FWHM ~ 250nm), we did not find any object
within the error circle of the Swift XRT source position (GCN 11803, P.A.
Evans et al.).
A 3 sigma upper limit is set in the I magnitude at 20.7 mag.

This photometry was done by using the DoPhot and calibrated against
the USNO-B1.0 catalog stars, and not corrected for the Galactic extinction.
Looking for U.S. government information and services? Visit