{
  "bibcode": "2010GCN.10430....1R",
  "body": "A. Rowlinson (U Leicester), S. D. Barthelmy (GSFC),\nW. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),\nD. N. Burrows (PSU), V. D'Elia (ASDC), P. A. Evans (U Leicester),\nN. Gehrels (NASA/GSFC), O. Godet (U Leicester),\nS. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),\nH. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL),\nO. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA),\nJ. Mao (INAF-OAB), F. E. Marshall (NASA/GSFC),\nP. T. O'Brien (U Leicester), C. Pagani (U. Leicester),\nK. L. Page (U Leicester), D. M. Palmer (LANL),\nP. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC),\nB. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU),\nM. Stamatikos (OSU/NASA/GSFC), M. A. Stark (PSU), M. C. Stroh (PSU)\nand L. Vetere (PSU) report on behalf of the Swift Team:\n\nAt 15:15:46 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 100219A (trigger=412982).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 154.221, -12.559 which is \n   RA(J2000)  =  10h 16m 53s\n   Dec(J2000) = -12d 33' 31\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty). As is usual for an image trigger, the BAT light\ncurve shows nothing of interest. \n\nThe XRT began observing the field at 15:18:45.0 UT, 178.5 seconds after\nthe BAT trigger. Using promptly downlinked data we find a fading,\nuncatalogued X-ray source with an enhanced position: RA, Dec 154.2024,\n-12.5671 which is equivalent to:\n   RA(J2000)  = 10h 16m 48.58s\n   Dec(J2000) = -12d 34' 01.7\"\nwith an uncertainty of 2.1 arcseconds (radius, 90% containment). This\nlocation is 71 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. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density consistent with the Galactic value of\n6.51e+20 cm^-2 (Kalberla et al. 2005). \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 183 seconds after the BAT trigger. No credible afterglow candidate has\nbeen found in the initial data products. The 2.7'x2.7' sub-image covers 100% of\nthe XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. \nThe 8'x8' region for the list of sources generated on-board covers 100% of the\nXRT error circle. The list of sources is typically complete to about 18 mag. No\ncorrection has been made for the expected extinction corresponding to E(B-V) of\n0.08. \n\nBurst Advocate for this burst is A. Rowlinson (bar7 AT star.le.ac.uk). \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": 10430,
  "createdOn": 1266593538000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 100219A: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 100219A"
}