{
  "bibcode": "2021GCN.30020....1D",
  "body": "A. D'Ai (INAF-IASFPA), E. Ambrosi (INAF-IASFPA),\nV. D'Elia (SSDC & INAF-OAR), J. A. Kennea (PSU),\nK. L. Page (U Leicester), B. Sbarufatti (PSU) and\nA. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 20:02:01 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated a GRB 210515C (trigger=1048618). \nThe BAT on-board calculated location is RA, Dec 1.050, -15.011 which is \n  RA(J2000) = 00h 04m 12.00s,\n  Dec(J2000) = -15d 00' 39.6\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty). \nThere is no lightcurve currently available to estimate the duration. \n\nUsing promptly downlinked data we find an uncatalogued X-ray source\nlocated at RA, Dec 1.09221, -14.95325 which is equivalent to:\n   RA(J2000)  = 00h 04m 22.13s\n   Dec(J2000) = -14d 57' 11.7\"\nwith an uncertainty of 4.9 arcseconds (radius, 90% containment). This\nposition may be improved as more data are received; the latest position\nis available at https://www.swift.ac.uk/sper. No spectrum from the\npromptly downlinked event data is yet available to determine the column\ndensity. \n\nNo UVOT data are available at this time. \n\nBurst Advocate for this burst is A. D'Ai (antonino.dai AT inaf.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/)",
  "circularId": 30020,
  "createdOn": 1621111824000,
  "email": "antonino.dai@inaf.it",
  "subject": "GRB 210515C: Swift detection of a burst",
  "submitter": "Antonino D'Ai at IASF-PA  <antonino.dai@inaf.it>",
  "eventId": "GRB 210515C"
}