{
  "bibcode": "2005GCN..3339....1C",
  "body": "J. Cummings (GSFC/NRC), L. Barbier (GSFC), S. Barthelmy (GSFC),\nE. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD),\nH. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL),\nA. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS),\nM. Suzuki (Saitama), M. Tashiro (Saitama U.), J. Tueller (GSFC),\n\non behalf of the Swift/BAT team:\n\nAt 09:25:40 UT, the Swift Burst Alert Telescope (BAT) triggered\nand located GRB050502B (trigger=116116) (GCN Circ 3330, Falcone \net al.).  The refined BAT ground position is (RA,Dec) = 142.543,\n+17.002, [deg; J2000] +- 3 arcmin, (95% containment).  This is\n24 arc seconds from the position determined by the XRT (GCN Circ\n3333, Pagani, et al.).  The burst was 10 degrees off the Swift\nboresight, within the fully-coded BAT field of view.\n\nThe BAT mask-weighted light curve shows one main peak of about 6 \nseconds duration centered at the trigger time preceded by two \nsmaller peaks 16 and 10 seconds earlier with a softer spectrum.  \nT90 (15-350 keV) is (17.5 +- 0.2) seconds (estimated error \nincluding systematics).\n\nThe spectrum is well fit by a single power law with photon index\nof 1.6 +- 0.1.  The fluence in the 15-350 keV band is \n(8.0 +- 1.0) x 10^-7 erg/cm2.  The peak photon flux in the 15-350 \nband is (1.73 +- 0.15) ph/cm2/s.  All the quoted errors are at the \n90% confidence level.\n\nWe note that this burst appears to be well-suited for ground\nfollow-up observations, as it is located 90 degrees from the Sun,\n180 degrees from the Moon, close to the ecliptic, and away from\nthe Galactic center.",
  "circularId": 3339,
  "createdOn": 1115082939000,
  "email": "jayc@milkyway.gsfc.nasa.gov",
  "subject": "GRB050502B Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <jayc@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050502B"
}