Gamma-ray Burst 120114A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN Circular #12833
  T. Sakamoto (GSFC/UMBC), C. Graziani (U of Chicago), J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
  Automated BAT ground analysis found a burst that occurred at 16:20:09 UT with a significance of 9.1 sigma (15-200 keV) from the failed event data of trigger #511739. The event is temporally coincident with the Fermi GBM 348250807. The best BAT location is RA, Dec = 317.9043, +57.0358 deg, which is

    RA(J2000)  =  21h 11m 37.03s 
    Dec(J2000) = +57d 02' 08.9" 
  

  with an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 18%.
  The mask-weighted light curve created from the failed event data (available from 16:20:06 to 16:20:16 UT) shows a constant positive rate from the beginning. And then, the rate increases by three times around 16:20:13 UT. From the BAT raw light curve, the duration of the event is ~35 sec long.
  The spectrum extracted using the full event data is best fit by a simple power-law model. The power law index of the spectrum is 1.4 +- 0.3 (90% confidence).
  Since the GRB is too close to the Sun, no Swift ToO has been requested.