{
  "bibcode": "2009GCN..9625....1M",
  "body": "D. C. Morris (PSU), A. P. Beardmore (U Leicester),\nP. A. Evans (U Leicester), H. A. Krimm (CRESST/GSFC/USRA),\nV. Mangano (INAF-IASFPA), J. Mao (INAF-OAB),\nC. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester),\nD. M. Palmer (LANL), A. Rowlinson (U Leicester), M. H. Siegel (PSU),\nM. A. Stark (PSU), G. Tagliaferri (INAF-OAB),\nT. N. Ukwatta (GSFC/GWU) and H. Ziaeepour (UCL-MSSL) report on behalf\nof the Swift Team:\n\nAt 07:38:34 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 090709 (trigger=356890).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 289.933, +60.731 which is \n   RA(J2000) = 19h 19m 44s\n   Dec(J2000) = +60d 43' 52\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed about four major\npeaks starting at T-20 and continuing to T+100 seconds. The peak \ncount rate was ~15000 counts/sec (15-350 keV), at ~25 sec after the trigger. \n\nThe XRT began observing the field at 07:39:42 UT, 67.8 seconds after the BAT\ntrigger. In the 2.5-s image-mode data we find a fading, uncatalogued X-ray\nsource with a position: RA, Dec 289.9291, +60.7271 which is equivalent to:\n   RA(J2000)  = 19h 19m 42.99s\n   Dec(J2000) = +60d 43' 37.5\"\nwith an uncertainty of 4 arcseconds (radius, 90% containment). This\nlocation is 16 arcseconds from the BAT onboard position, within the BAT\nerror circle. \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 overlap of the sub-image and the\nXRT error circle is 100%. The overlap of the 8'x8' region for the list of\nsources generated on-board and the XRT error circle is 100%. No correction\nhas been made for the expected extinction corresponding to E(B-V) of 0.09. \n\nBurst Advocate for this burst is D. C. Morris (morris 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": 9625,
  "createdOn": 1247126828000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 090709: Swift detection of a bright burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 090709"
}