{
  "circularId": 36109,
  "createdOn": 1713168044962,
  "bibcode": "2024GCN.36109....1E",
  "eventId": "GRB 240415A",
  "submitter": "P.A. Evans at U. Leicester <pae9@leicester.ac.uk>",
  "submittedHow": "email",
  "body": "P.A. Evans (U. Leicester), K.L. Page (U. Leicester) and M. J. Moss (GSFC)\nreport on behalf of the Swift-XRT team:\n\nThe automated Swift slew to GRB 240415A (BAT trigger 1221874; Moss et al.,\nGCN Circ. 36108) was delayed due to an Earth limb constraint. \n\nThe XRT began observing the field at 07:21:58.2 UT, 3305 seconds\nafter the BAT trigger. Using promptly downlinked data we find an\nuncatalogued X-ray source located at RA, Dec 129.19096 73.14608 which\nis equivalent to:\n   RA(J2000)  = 08h 36m 45.83s\n   Dec(J2000) = +73d 08' 45.9\"\nwith an uncertainty of 3.6 arcseconds (radius, 90% containment). This is\n105 arcseconds from the BAT position, inside the BAT error circle. This\nposition may be improved as more data are received; the latest position\nis available at https://www.swift.ac.uk/sper. \n\nA power-law fit to a spectrum formed from promptly downlinked event\ndata gives a column density in excess of the Galactic value (2.49 x\n10^20 cm^-2, Willingale et al. 2013), with an excess column of 6.5\n(+3.49/-2.94) x 10^21 cm^-2 (90% confidence). \n\n",
  "subject": "GRB 240415A: Prompt Swift-XRT observations"
}