Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 6873

GRB 071010B possible optical transient
2007-10-10T22:53:58Z (17 years ago)
AAVSO GRB Network at AAVSO <>
A. Oksanen (Nyrola Observatory, Jyvaskyla, Finland) reports to the AAVSO
International High Energy Network the following optical observations of
GRB071010B (GCN #6871, Markwardt et al.):

Arto Oksanen reports the detection of an optical transient located at
RA 10:02:9.26, Dec +45:43:50.3 (J2000) at an initial unfiltered magnitude of

17.538 calibrated relative to USNOB R-band magnitudes.  Midpoint of the
exposures is 2007 Oct 10, 21:11:05 UTC, approximately 25 minutes after the

There are no comparably bright stars within 0.5 arcminutes, and no minor
planets in the area.

Subsequent unfiltered images place the star fainter than 18th magnitude
(unfiltered) indicating the object has faded since observations began.
Analysis of additional unfiltered, Rc, Ic, and V images will be forthcoming.

The AAVSO thanks the Curry Foundation for their continued support of the
AAVSO International High Energy Network.
Looking for U.S. government information and services? Visit