{
  "bibcode": "2007GCN..6463....1M",
  "body": "F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC),\nA. P. Beardmore (U Leicester), S. Campana (INAF-OAB),\nG. Cusumano (INAF-IASFPA), V. Mangano (INAF-IASFPA),\nP. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),\nC. Pagani (PSU), D. M. Palmer (LANL),\nP. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA),\nD. E. Vanden Berk (PSU) and H. Ziaeepour (UCL-MSSL) report on behalf\nof the Swift Team:\n\nAt 08:49:18 UT, the Swift Burst Alert Telescope (BAT) triggered (trigger=280447)\nand located a probable Galactic transient.  Due to the Earth limb constraint,\nthe Swift slew to the target was delayed by 9 minutes. \nThe BAT on-board calculated location is \nRA, Dec 301.271, +31.484 which is \n   RA(J2000)  =  20h 05m 05s\n   Dec(J2000) = +31d 29' 02\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  As is usual for 64 second image triggers,\nthe raw BAT lightcurve available via TDRSS does not show any\nobvious variation. \n\nThe XRT began observing the field at 09:00:38 UT, 680 seconds after the\nBAT trigger. XRT found a bright uncatalogued X-ray source\nlocated at RA, Dec 301.3168, +31.3876 which is\n   RA(J2000)  =  20h 05m 16.0s\n   Dec(J2000) =  31d 23' 15.3\"\nwith an uncertainty of 4.7 arcseconds (radius, 90% containment). \nThis location is 374 arcseconds from the BAT on-board position,\noutside the BAT error circle. The initial flux in the 2.5s image\nwas 8.8e-09 erg/cm2/s (0.2-10 keV). \n\nThere is no UVOT information for this burst.  This trigger is\ndistinct and separate from the trigger 280450.  We will have a separate\ncircular on that second trigger shortly. \n\nThis location is on the Galactic plane (lat=-0.2deg), the XRT intensity\nis much brighter than would be expected for a GRB at T+10\nminutes and is highly-absorbed non-power-law spectrum. \nTherefore this source is probably a Galactic transient.",
  "circularId": 6463,
  "createdOn": 1180172223000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "Swift trigger 280447 is probably a Galactic transient",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}