[vsnet-grb-info 6996] SGR 1806-20: Fermi GBM detection.

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  8580
SUBJECT: SGR 1806-20: Fermi GBM detection.
DATE:    08/11/29 17:52:19 GMT
FROM:    Valerie Connaughton at MSFC  <valerie at nasa.gov>

Valerie Connaughton (UAH) and Chryssa Kouveliotou (NASA/MSFC)
report on behalf of the Fermi GBM Team:

"At 00:38:12.71 UT on 29 November 2008, the Fermi Gamma-Ray Burst
Monitor triggered on a short, soft event
(trigger 249611893 / 081129027).
The GBM on-ground location is consistent with the Soft Gamma
Repeater SGR 1806-20.

A preliminary estimate of the duration (128 ms) and count spectrum of
the event reinforce its association with the repeater source. This is
the second recent Fermi GBM-triggered event from SGR 1806-20, the first
having occurred on 06 November 2008 (GCN 8497, McBreen and
Kouveliotou).

The angle from the Fermi LAT boresight is 118 degrees.

Detailed timing and spectral analysis are in progress."