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.