GCN Circular 10159
Subject
GRB 091111: a faint long GRB detected with INTEGRAL
Date
2009-11-12T10:43:53Z (15 years ago)
From
Diego Gotz at CEA <diego.gotz@cea.fr>
D. Gotz (CEA-Saclay), E.Bozzo, C. Baldovin (ISDC, Versoix), S.Mereghetti,
A.Paizis (IASF-Milano), M. Beck, (ISDC, Versoix), C. Ferrigno
(ISDC, Versoix/IAAT, Tuebingen) and J.Borkowski (CAMK, Torun)
on behalf of the IBAS Localization Team report:
a long faint and soft gamma-ray burst has been detected by the
INTEGRAL Burst Alert System in IBIS/ISGRI data on November 11 2009.
Due to its faintness no automatic alert has been issued and the GRB
has been identified through the routine off-line analysis of the low
significance triggers. The GRB starts at 15:21:59 U.T. and lasts for
about 100 s.
The GRB coordinates (J2000) are
R.A. : 137.8133 [degrees] , Dec.: -45.9093 [degrees]
with a 90% c.l. radius unercainty of 2.5 arcmin.
Even if no known X-ray source is present in the IBAS error circle, we
note that the low galactic latitude of the object and its soft X-ray
spectrum may indicate also a Galactic transient origin.
The light curve of the GRB will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
This message can be cited.
[GCN OPS NOTE(12nov09): Per author's request, CB was added
to the author list.]