{
  "bibcode": "2015GCN.17526....1L",
  "body": "A. Y. Lien (GSFC/UMBC), M. M. Chester (PSU),\nM. De Pasquale (INAF-IASFPA), A. Maselli (INAF-IASFPA),\nD. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the\nSwift Team:\n\nAt 05:42:36 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 150302A (trigger=633237).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 175.508, +36.827 which is \n   RA(J2000) = 11h 42m 02s\n   Dec(J2000) = +36d 49' 37\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a single complex peak\nstructure with a duration of about 30 sec.  The peak count rate\nwas ~800 counts/sec (15-350 keV), at ~2 sec after the trigger. \n\nThe XRT began observing the field at 05:44:17.5 UT, 100.9 seconds after\nthe BAT trigger. XRT found a bright, uncatalogued X-ray source located\nat RA, Dec 175.5314, 36.8110 which is equivalent to:\n   RA(J2000)  = +11h 42m 7.54s\n   Dec(J2000) = +36d 48' 39.6\"\nwith an uncertainty of 5.9 arcseconds (radius, 90% containment). This\nlocation is 88 arcseconds from the BAT onboard position, within the BAT\nerror circle. No event data are yet available to determine the column\ndensity using X-ray spectroscopy. \n\nUVOT took a finding chart exposure of\t2 seconds with the White filter \nstarting 109 seconds after the BAT trigger. No credible afterglow\ncandidate has  been found in the initial data products. Results from\nthe 2.7'x2.7' sub-image are not available at this time. Results from the\nlist of sources  generated on-board are not available at this time. No\ncorrection has been made  for the expected extinction corresponding to\nE(B-V) of 0.02. \n\nBurst Advocate for this burst is A. Y. Lien (amy.y.lien AT 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": 17526,
  "createdOn": 1425275778000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 150302A: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 150302A"
}