{
  "bibcode": "2014GCN.16551....1S",
  "body": "C. A. Swenson (PSU), W. H. Baumgartner (GSFC/UMBC),\nD. N. Burrows (PSU), S. B. Cenko (GSFC), M. M. Chester (PSU),\nJ. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),\nN. Gehrels (NASA/GSFC), J. A. Kennea (PSU),\nH. A. Krimm (CRESST/GSFC/USRA), V. Mangano (PSU),\nF. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),\nD. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the\nSwift Team:\n\nAt 15:15:45 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 140709B (trigger=603866).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 146.071, +63.505 which is \n   RA(J2000) = 09h 44m 17s\n   Dec(J2000) = +63d 30' 20\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a multi-peaked\nstructure with a duration of about 150 sec.  The peak count rate\nwas ~1500 counts/sec (15-350 keV), at ~20 sec after the trigger. \n\nThe XRT began observing the field at 15:17:15.9 UT, 91.0 seconds after\nthe BAT trigger. Using promptly downlinked data we find a bright,\nuncatalogued X-ray source located at RA, Dec 146.05394, 63.53040 which\nis equivalent to:\n   RA(J2000)  = 09h 44m 12.95s\n   Dec(J2000) = +63d 31' 49.4\"\nwith an uncertainty of 3.9 arcseconds (radius, 90% containment). This\nlocation is 95 arcseconds from the BAT onboard position, within the BAT\nerror circle. This position may be improved as more data are received;\nthe latest position is available at http://www.swift.ac.uk/sper. No\nspectrum from the promptly downlinked event data is yet available to\ndetermine the column density. \n\nThe initial flux in the 2.5 s image was 3.60e-09 erg cm^-2 s^-1 (0.2-10\nkeV). \n\nUVOT took a finding chart exposure of 250 seconds with the U filter starting 96\nseconds after the BAT trigger. No credible afterglow candidate has been found\nin the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT\nerror circle. The typical 3-sigma upper limit has been about 19.2 mag. The\n8'x8' region for the list of sources generated on-board covers 100% of the XRT\nerror circle. The list of sources is typically complete to about 18.0 mag. No\ncorrection has been made for the expected extinction corresponding to E(B-V) of\n0.04. \n\nBurst Advocate for this burst is C. A. Swenson (cswenson AT astro.psu.edu). \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": 16551,
  "createdOn": 1404919815000,
  "email": "kennea@swift.psu.edu",
  "subject": "GRB 140709B: Swift detection of a burst",
  "submitter": "Jamie A. Kennea at PSU/Swift-XRT  <kennea@swift.psu.edu>",
  "eventId": "GRB 140709B"
}