[AAVSO-HEN] GRB 090303: Fermi GBM detection

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
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TITLE:   GCN CIRCULAR
NUMBER:  8931
SUBJECT: GRB 090303: Fermi GBM detection
DATE:    09/03/04 17:23:12 GMT
FROM:    Arne Rau at MPE  <arau at mpe.mpg.de>

Arne Rau (MPE) reports on behalf of the Fermi GBM Team:

"At 13:00:37.04 UT on 03 March 2009, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located a weak source (trigger 257778039 / 090303.542).

The human-in-the-loop location is RA=223.7, Dec=-68.2 (J2000 degrees)
with an uncertainty of 12.1 degrees(radius, 1-sigma containment, 
statistical
only; there is additionally a systematic error which is currently 
estimated to
be 2 to 3 degrees).

The most likely nature of the source is a GRB, but it could also be an SGR.
Since the source is very weak, it is not possible to find a more reliable
on-ground calculated location and to perform any spectral analysis."