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 7386

GRB 080310, SMARTS optical/IR afterglow observations
2008-03-10T09:48:46Z (16 years ago)
Bethany Cobb at Yale U <>
B. E. Cobb, part of the larger SMARTS consortium, reports:

Using the ANDICAM instrument on the 1.3m telescope at CTIO, we
obtained optical/IR imaging of the error region of GRB 080310
(GCN 7382, Cummings et al.) beginning 20 minutes post-burst
(2008-03-10 08:58 UT).  Total summed exposure times amounted
to 180s in BRIYJK and 120s in H and V.

The afterglow of GRB 080310 (GCN 7382, Cummings et al. & GCN 7383,
Chornock et al.) is detected in our images.  Preliminary comparison to
USNO-B1.0 stars in I and 2MASS stars in J indicates the following
afterglow magnitudes:

time post-burst         I mag           J mag
~25 minutes             16.3+/-0.2      15.9+/-0.2

The afterglow fades by ~0.4 magnitudes in I between 25 and 45 minutes
post-burst.  This source is therefore confirmed to
be the afterglow of GRB 080310, with a decay rate of alpha ~ -0.6.
Looking for U.S. government information and services? Visit