[vsnet-grb-info 8652] GRB 091111: a faint long GRB detected with INTEGRAL
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Thu Nov 12 19:43:59 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 10159
SUBJECT: GRB 091111: a faint long GRB detected with INTEGRAL
DATE: 09/11/12 10:43:53 GMT
FROM: Diego Gotz at CEA <diego.gotz at cea.fr>
D. Gotz (CEA-Saclay), E.Bozzo (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.
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