{
  "bibcode": "2012GCN.13038....1M",
  "body": "F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC),\nM. M. Chester (PSU), J. R. Cummings (NASA/UMBC),\nP. D'Avanzo (INAF-OAB), C. Guidorzi (U Ferrara),\nA. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), D. M. Palmer (LANL),\nB. Sbarufatti (INAF-OAB/PSU), E. Sonbas (NASA/GSFC/Adiyaman Univ.) and\nB.-B. Zhang (PSU) report on behalf of the Swift Team:\n\nAt 15:08:10 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 120311B (trigger=517489).  Swift did not slew immediately\nbecause of the Earth limb observing constraint. \nThe BAT on-board calculated location is \nRA, Dec 258.501, -13.060 which is \n   RA(J2000)  =  17h 14m 00s\n   Dec(J2000) = -13d 03' 34\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows two peaks\nstructure with a duration of about 20 sec.  The peak count rate\nwas ~1000 counts/sec (15-350 keV), at ~10 sec after the trigger. \n\nDue to an observing constraint, Swift will not slew until T0+49.0\nminutes. There will be no XRT or UVOT data until this time. \n\nBurst Advocate for this burst is F. E. Marshall (marshall AT milkyway.gsfc.nasa.gov). \nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/too.html.)",
  "circularId": 13038,
  "createdOn": 1331479048000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 120311B: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 120311B"
}