Gamma-ray Burst 111126A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN Circular #12599
  J. R. Cummings (NASA/UMBC/CRESST), D. M. Palmer (LANL) on behalf of the Swift-BAT team
  At 18:57:42 UTC, on November 26, 2011, BAT count rates spiked during a pre-planned slew maneuver. In a mosaic of images from slew event data, a significant source was found at RA, Dec 276.057, +51.461, which is

  RA (J2000) 18h 24m 13.6s
  Dec (J2000) 51d 27' 38"
  

  with an estimated uncertainty of 3 arcmin radius. This location is currently about 29 degrees from the Sun. No Swift followup is anticipated.
  It was a short, hard GRB with multiple peaks. T90 was 0.8 +/- 0.1 seconds.
  The BAT spectrum is best fit by a simple powerlaw with a photon index of 1.1 +/- 0.3. The fluence in 0.8 seconds was 7 +/- 2 ergs/cm^2. The peak flux was 1.2 +/- 0.4 photons/cm^2/s. The uncertainties are 90% estimated including systematics.
• GCN Circular #12603
  J. R. Cummings (GSFC/UMBC/CRESST) on behalf of the Swift-BAT team
  The magnitude of the fluence was omitted in the circular, it should have been (7 +/- 2) x 10^-8 ergs/cm^2. We thank Kevin Hurley for pointing out the error.