{
  "bibcode": "2019GCN.23651....1B",
  "body": "D.N. Burrows (PSU), J.A. Kennea (PSU), S. Campana (INAF-OAB), G.\nCusumano (INAF-IASF PA), P.A. Evans (U. Leicester) and J.P. Osborne (U.\nLeicester) report on behalf of the Swift-XRT team:\n\nThe XRT began observing the field of GRB 190109B at 11:57:36.3 UT, 87.1\nseconds after the BAT trigger. Using promptly downlinked data we find a\nfading, uncatalogued X-ray source with an enhanced position: RA, Dec\n55.4870, 63.5920 which is equivalent to:\n   RA(J2000)  = 03h 41m 56.88s\n   Dec(J2000) = +63d 35' 31.2\"\nwith an uncertainty of 2.1 arcseconds (radius, 90% containment). This\nlocation is 180 arcseconds from the BAT onboard position, outside the\nBAT error circle. This position may be improved as more data are\nreceived; the latest position is available at\nhttp://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 4.56\nx 10^21 cm^-2 (Willingale et al. 2013).",
  "circularId": 23651,
  "createdOn": 1547040071000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 190109B: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 190109B"
}