{
  "bibcode": "2014GCN.16082....1D",
  "body": "V. D'Elia (ASDC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC),\nS. T. Holland (STScI), L. Izzo (URoma/ICRA), J. A. Kennea (PSU),\nH. A. Krimm (CRESST/GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU),\nF. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),\nD. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU),\nR. L. C. Starling (U Leicester) and C. A. Swenson (PSU) report on\nbehalf of the Swift Team:\n\nAt 13:15:54 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 140408A (trigger=595141).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 290.685, -12.578 which is \n   RA(J2000)  =  19h 22m 44s\n   Dec(J2000) = -12d 34' 40\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows a single peak\nwith a duration of about 10 sec.  The peak count rate\nwas ~2000 counts/sec (15-350 keV), at ~1 sec after the trigger. \n\nThe XRT began observing the field at 13:17:40.2 UT, 105.5 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source located at RA, Dec 290.71576, -12.59373 which is\nequivalent to:\n   RA(J2000)  = 19h 22m 51.78s\n   Dec(J2000) = -12d 35' 37.4\"\nwith an uncertainty of 4.1 arcseconds (radius, 90% containment). This\nlocation is 122 arcseconds from the BAT onboard position, within the\nBAT error circle. This position may be improved as more data are\nreceived; the latest position is available at\nhttp://www.swift.ac.uk/sper. No spectrum from the promptly downlinked\nevent data is yet available to determine the column density. \n\nUVOT took a finding chart exposure of 150 seconds with the White\nfilter  starting 109 seconds after the BAT trigger. No credible\nafterglow candidate has  been found in the initial data products. The\n2.7'x2.7' sub-image covers none of  the XRT error circle. The 8'x8'\nregion for the list of sources generated on-board covers  100% of the\nXRT error circle. Because of the density of catalogued stars,  further\nanalysis is required to report an upper limit for any afterglow in the\nregion. No correction has been made for the expected extinction\ncorresponding  to E(B-V) of 0.19. \n\nBurst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). \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": 16082,
  "createdOn": 1396964146000,
  "email": "scott@milkyway.gsfc.nasa.gov",
  "subject": "GRB 140408A: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 140408A"
}