[AAVSO-HEN] GRB 090817: a long GRB localized by INTEGRAL

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  9815
SUBJECT: GRB 090817: a long GRB localized by INTEGRAL
DATE:    09/08/17 02:53:44 GMT
FROM:    Volker Beckmann at ISDC  <Volker.Beckmann at obs.unige.ch>

V.Beckmann (ISDC, Versoix), D.Gotz (CEA-Saclay), S.Mereghetti,
A.Paizis (IASF-Milano), A. Neronov, M. Beck (ISDC, Versoix), and J.
Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report:

A long GRB with duration of about 250 s has been detected by IBAS in
IBIS/ISGRI data at 00:51:33 UT on August 17th.

The refined coordinates (J2000) are:

   RA:   63.9659 [degrees]
   DEC: +44.1234 [degrees]

with an uncertainty of 2.6 arcmin (90% c.l.).

The light curve shows two prominent peaks at T0 and at T0+196s. A plot  
of the light curve will be posted at

http://ibas.iasf-milano.inaf.it/IBAS_Results.html

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