{
  "bibcode": "2010GCN.10411....1G",
  "body": "D. Grupe (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),\nC. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC),\nE. A. Hoversten (PSU), J. A. Kennea (PSU),\nH. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD),\nD. M. Palmer (LANL), T. Sakamoto (NASA/UMBC),\nB. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU),\nM. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report\non behalf of the Swift Team:\n\nAt 22:27:48 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 100213A (trigger=412217).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 349.428, +43.383 which is \n   RA(J2000)  =  23h 17m 43s\n   Dec(J2000) = +43d 23' 00\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve shows two main spikes\nwith a total duration of about 4 sec (we can not reject a short burst). \nThe peak count rate was ~6000 counts/sec (15-350 keV), at ~2 sec\nafter the trigger. \n\nThe XRT began observing the field at 22:29:00.8 UT, 72.7 seconds after\nthe BAT trigger. Using promptly downlinked data we find an uncatalogued\nX-ray source with an enhanced position: RA, Dec 349.3917, 43.3796 which\nis equivalent to:\n   RA(J2000)  = 23h 17m 34.01s\n   Dec(J2000) = +43d 22' 46.4\"\nwith an uncertainty of 3.2 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.  We\ncannot determine whether the source is fading at the present time. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density consistent with the Galactic value of\n1.11e+21 cm^-2 (Kalberla et al. 2005). \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 76 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 16% 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\n0.31. \n\nBurst Advocate for this burst is D. Grupe (grupe 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": 10411,
  "createdOn": 1266101056000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 100213A: Swift detection of a burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 100213A"
}