We observed the INTEGRAL-IBAS position of the GRB 081226b (GCN 8734) at 4.800 and 4.928 GHz with the Australia Telescope Compact Array (ATCA) between 01:00:00 UT and 22:00:00 UT on February 21/22, 2009. We did not detect a radio source at the position of the GRB 081226b (GCN 8734). The data at 4.800 and 4.928 GHz were merged and the radio flux density at the GRB position found out to be -0.176...Full Text

"At 12:13:10.71 UT on 26 December 2008, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 081226B (trigger 251986391 / 081226509), which was also detected by INTEGRAL (Mereghetti et al. 2008, GCN 8734) The GBM on-ground location is consistent with the INTEGRAL position. The angle from the Fermi LAT boresight is 22 degrees. The GBM light curve consists of a single pulse with a duration...Full Text

Swift observed the field of GRB 081226B (Mereghetti et al. GCN 8734) for 8 ks, beginning 9.6 ks after the INTEGRAL trigger. The XRT data (all in Photon Counting mode) contain no source in the INTEGRAL error circle. A 3-sigma upper limit is 0.001 counts/sec which is 5.6e-14 erg cm^-2 s^-1 for a typical GRB spectrum. Given the absence of an XRT position, the UVOT images were compared to archival...Full Text

A short hard GRB consisting of a single peak with duration of about 0.7 s has been detected by IBAS in IBIS/ISGRI data at 12:13:11 UT on December 26th. The refined coordinates (J2000) are: RA = 25.495 [degrees] DEC= -47.439 [degrees] with an uncertainty of 2.5 arcmin (90% c.l.). A preliminary analysis gives a peak flux in the 20-200 keV range of about 3 ph/cmq/s (0.2 s integration time)...Full Text