[AAVSO-HEN] GRB 090213: 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:  8904
SUBJECT: GRB 090213: Fermi GBM detection
DATE:    09/02/18 16:50:51 GMT
FROM:    Andreas von Kienlin at MPE  <azk at mpe.mpg.de>

Arne Rau (MPE) and Andreas von Kienlin (MPE)
report on behalf of the Fermi GBM Team:

"At 05:39:25.46 UT on 13 February 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090213 (trigger 256196367 / 090213236).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 327.0, Dec = -53.5 (J2000 degrees, equivalent to 
J2000 21h 48m, -53d 30'), with a statistical uncertainty of 3.7 degrees
(radius, 1-sigma containment, statistical only; there is additionally 
a systematic error which is currently estimated to be 2 to 3 degrees).

The angle from the Fermi LAT boresight is 17 degrees.

Since the source is weak, the time-averaged spectrum is poorly 
constrained."