GRB 060912B

D.Gotz (CEA, Saclay), S.Mereghetti, A.Paizis (IASF-Milano), S.Soldi, N.Mowlavi, M.
Beck (ISDC, Versoix), and J. Borkowski (CAMK, Torun) on behalf of the IBAS
Localization Team report:

A GRB lasting about 200 s has been detected by IBAS in IBIS/ISGRI data at
17:33:40 UT on September 12, 2006.

The coordinates (J2000)  are:

R.A.: 271.2167 [degrees],
DEC.: -19.8804 [degrees]

with an uncertainty of 2.5 arcmin (90% c.l.).

The peak flux in the 20-200 keV is 0.08 ph/cmsq/s. The fluence in the same
band is 6E-7 erg/cmsq.

A plot of the light curve will be posted at

http://ibas.mi.iasf.cnr.it/IBAS_Results.html

This message can be cited.

J.French (UCD Dublin), P.Kubanek (AsU AV CR Ondrejov & ISDC Versoix), 
and Martin Jelinek (IAA Granada) report on behalf of the Watcher 
collaboration:

The Watcher 0.4 m telescope, located at the Boyden Observatory, South
Africa, began observing the location of GRB 060912B at 17:34:44 UT (60s
after the burst). We detect a bright source (Rmag = 12.1+/-0.2) at RA 
18:05:00.005, DEC -19:51:42.37 J2000, which is present in USNO-B1.0 (as 
U0675_24058876 with coordinate end figures 0.005 and 42.37), but 
significantly brighter than expected. Unfiltered images, calibrated 
relative to USNO, give an approximate Rmag = 12.1+/-0.2 for the source, 
as opposed to the value of 14.4 quoted in the catalog. The object is not 
present in Simbad as a known variable star.

We do not, however, expect that this source is associated with GRB 
060912B due to the absence of significant decay up to T0+4hrs. Finding 
charts can be found at: http://bermuda.ucd.ie/~jfrench/060912/charts.html