Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 1299

GRB020322: Candidate Optical Afterglow
2002-03-23T16:02:37Z (22 years ago)
Don Lamb at U.Chicago <>
R. J. McMillan, D. Q. Lamb, and D. G. York, Report:

We have obtained one 10-minute exposure in r' and three 10-minute
exposures in i' of the Beppo-SAX NFI error-box (Gandolfi, GCN 1291) for
GRB020322 (Piro, GCN 1290) using SPIcam on the ARC 3.5-meter telescope at
APO beginning at UTC 9:44 on 2002 March 23.  We estimate the magnitude of
object b (Bloom et al., GCN 1296) in our images to be r*=24.5+/-0.7 and
i*=24.0+/-0.7. We find that object b is now as faint as or fainter than
object c (Bloom et al., GCN 1296, Greiner et al., GCN 1298) in both r* and
i*.  We therefore confirm that the object has faded (Greiner et al., GCN
1298) and is likely to be the optical afterglow of GRB020322.

This message is citable.
Looking for U.S. government information and services? Visit