Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 6688

AGILE-ACS position for the SGR 1806-20 July 27 burst
2007-07-30T16:25:36Z (17 years ago)
Sandro Mereghetti at IASF/CNR <>
F.Perotti, A.Giuliani, S.Mereghetti, M.Fiorini, S.Vercellone, A.Chen, 
A.Pellizzoni (IASF-Milano), C.Labanti, M.Trifoglio, G.Di Cocco 
(IASF-Bologna), M.Tavani, M.Feroci, A.Argan, A.Trois (IASF-Roma), 
G.Picozza (INFN-Roma), F.Longo, G. Barbiellini (INFN-Trieste), on behalf 
of the AGILE Team

and  P. Giommi, L.A. Antonelli, 
C. Pittori (ASDC), and L. Salotti (ASI) report:

The SGR-like burst detected on July 27 at about 06:41 UT with Konus/Wind, 
INTEGRAL-SPI-ACS, RHESSI and Suzaku-WAM (Golenetskii et al. GCN 6684), and 
likely associated to SGR 1806-20, has been seen also by the 
Anticoincidence system of AGILE.

This segmented anticoincidence detector surrounds the gamma-ray tracker 
on five sides (top and 4 lateral). The relative intensity of the count 
rates measured from the different sides allows to estimate the arrival 
direction of the detected bursts.

Based on a simple geometrical model, the detection of this event in two of 
the lateral panels and its non-detection in the top panel, yields an 
instrumental azimuthal angle within 3 degrees from that of SGR 1806-20.
We thus support the association of this event with SGR 1806-20.
Looking for U.S. government information and services? Visit