{
  "bibcode": "2018GCN.22723....1L",
  "body": "S. J. LaPorte (PSU), A. P. Beardmore (U Leicester),\nA. A. Breeveld (UCL-MSSL), D. N. Burrows (PSU), A. Deich (PSU),\nS. W. K Emery (UCL-MSSL), J.D. Gropp (PSU), A. Y. Lien (GSFC/UMBC),\nF. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),\nB. Sbarufatti (PSU), M. H. Siegel (PSU) and A. Tohuvavohu (PSU) report\non behalf of the Neil Gehrels Swift Observatory Team:\n\nAt 13:25:33 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 180514A (trigger=832368).  Swift slewed immediately to the burst. \nThe BAT on-board calculated location is \nRA, Dec 197.401, +36.969 which is \n   RA(J2000) = 13h 09m 36s\n   Dec(J2000) = +36d 58' 10\"\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 40 sec.  The peak count rate\nwas ~1300 counts/sec (15-350 keV), at ~5 sec after the trigger. \n\nThe XRT began observing the field at 13:26:51.3 UT, 77.8 seconds after\nthe BAT trigger. Using promptly downlinked data we find a bright,\nuncatalogued X-ray source with an enhanced position: RA, Dec 197.3713,\n36.9720 which is equivalent to:\n   RA(J2000)  = 13h 09m 29.12s\n   Dec(J2000) = +36d 58' 19.3\"\nwith an uncertainty of 3.6 arcseconds (radius, 90% containment). This\nlocation is 86 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 1.18\nx 10^20 cm^-2 (Willingale et al. 2013). \n\nThe initial flux in the 2.5 s image was 1.69e-09 erg cm^-2 s^-1 (0.2-10\nkeV). \n\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 86 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\n0.01. \n\nThe first BAT Position notice identified this trigger as a transient\nfrom a known source because of proximity with the spiral galaxy NGC\n5005. However, given the separation between the XRT position and NGC\n5005 (~18 arcmin) and the look of the promptly downlinked BAT and XRT\ndata we believe this is a GRB not associated with the foreground\ngalaxy. \n\nBurst Advocate for this burst is S. J. LaPorte (extragsam AT gmail.com). \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": 22723,
  "createdOn": 1526305716000,
  "email": "bxs60@psu.edu",
  "subject": "GRB 180514A: Swift detection of a burst",
  "submitter": "Boris Sbarufatti at PSU  <bxs60@psu.edu>",
  "eventId": "GRB 180514A"
}