TITLE: GCN CIRCULAR NUMBER: 36890 SUBJECT: GRB 240715A: Swift-XRT observations DATE: 24/07/16 15:15:05 GMT FROM: Phil Evans at U of Leicester <pae9@star.le.ac.uk> V. D'Elia (SSDC & INAF-OAR), A. Tohuvavohu (U. Toronto), D.N. Burrows (PSU), J. D. Gropp (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), B. Sbarufatti (INAF-OAB), C. Salvaggio (INAF-OAB) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the IPN-detected burst GRB 240715A, collecting 4.7 ks of Photon Counting (PC) mode data between T0+36.0 ks and T0+54.3 ks. Three uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading. Therefore, at the present time we cannot identify which, if any, is the afterglow. Details of these sources are given below: Source 1: RA (J2000.0): 5.2342 = 00:20:56.20 Dec (J2000.0): -36.5445 = -36:32:40.1 Error: 6.7 arcsec (radius, 90% conf.) Count-rate: (1.40 [+0.84, -0.62])e-3 ct s^-1 Distance: 135 arcsec from IPN position. Source 2: RA (J2000.0): 5.3550 = 00:21:25.20 Dec (J2000.0): -36.6383 = -36:38:17.9 Error: 7.8 arcsec (radius, 90% conf.) Count-rate: (1.83 [+1.05, -0.78])e-3 ct s^-1 Distance: 487 arcsec from IPN position. Flux: (3.3 [+1.9, -1.4])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 3: RA (J2000.0): 5.1463 = 00:20:35.12 Dec (J2000.0): -36.3896 = -36:23:22.4 Error: 5.5 arcsec (radius, 90% conf. [Enhanced position]) Count-rate: (4.0 [+1.4, -1.2])e-3 ct s^-1 Distance: 595 arcsec from IPN position. Flux: (6.7 [+2.3, -1.9])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV) Further analysis is ongoing. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021699. This circular is an official product of the Swift-XRT team. View this GCN Circular online at https://gcn.nasa.gov/circulars/36890. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...