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 8786

GRB 090107B: a long GRB localized by INTEGRAL
2009-01-07T17:05:19Z (15 years ago)
Diego Gotz at CEA <>
D. Gotz (CEA-Saclay), S.Mereghetti, A.Paizis (IASF-Milano), C. Ferrigno,
V.Beckmann, M. Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on
behalf of the IBAS Localization Team report:

A GRB lasting about 20 s has been detected by IBAS in IBIS/ISGRI data at
16:20:36 UT on January 7th. The refined coordinates (J2000)  are:

RA = 284.8075 [degrees]
DEC= 59.5924 [degrees]

with an uncertainty of 1.5 arcmin (90% c.l.).

A preliminary analysis gives a peak flux in the 20-200 keV range of
about 1.6 ph/cmsq/s (1-s integration time) and a fluence over the  
same energy
range of about 1.5e-6 erg/cmsq. Both values have to be considered  
lower limits,
since the burst is affected by telemetry saturation.

A plot of the light curve will be posted at

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