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 963

GRB010222: possible optical counterpart
2001-02-22T13:12:07Z (23 years ago)
Krzysztof Z. Stanek at CfA <>
J. McDowell, R. Kilgard (Harvard-Smithsonian CfA), P. M. Garnavich
(Notre Dame), K. Z. Stanek and S. Jha (Harvard-Smithsonian CfA)

We have an independent detection of a new source in the revised SAX
error box (GCN 960). Its position, based on the GSC, agrees with that
of Henden (GCN 962): 14:52:12.55 43:01:06.26 (J2000).

Comparing to star "A" (R=17.0) from the USNO catalog (located at
14:52:07.55 42:58:48.66), we estimate the R-band magnitude of the
possible GRB010221 afterglow to be R=18.4\pm 0.1.

This message can be cited.
Looking for U.S. government information and services? Visit