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 12365

GRB 110918A: INT optical detection of Swift candidate afterglow
2011-09-20T13:53:36Z (13 years ago)
Nial Tanvir at U.Leicester <>
N.R. Tanvir, K. Wiersema (U. Leicester), A.J. Levan, S. Greiss,��
B. Gaensicke (U. Warwick) report on behalf of a larger collaboration:��

We observed the field of IPN burst GRB 110918A (Hurley et al. GCN
12357) with the Isaac Newton Telescope on La Palma, using the Wide
Field Camera starting at 20-Sep-2011 02:22 UT, roughly 29 hours
post-burst. ��Close to the location of the X-ray source reported by Mangano
et al. (GCN 12364) we detect a bright optical point-source which is not
visible in the DSS2 images of the region.

Very provisional calibration gives a magnitude R~19.0-19.5 (well above the
DSS2 limit) and a position:��

RA(2000)=02 10 09.39��
dec(2000)=-27 06 19.6��

accurate to ~0.5" in each coordinate. ��We cannot yet assess variability.
Looking for U.S. government information and services? Visit