{
  "bibcode": "2015GCN.18018....1M",
  "body": "A. Melandri (INAF-OAB), P. Kuin (MSSL-UCL), V. D'Elia (ASDC), A. D'ai\n(INAF-IASFPA), L.M. McCauley (PSU), J.A. Kennea (PSU), B. Sbarufatti\n(INAF-OAB/PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester),\nA.P. Beardmore (U. Leicester), A. Maselli (INAF-IASFPA) and P.A. Evans\n(U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-detected burst GRB 150710B (Cummings et al. GCN Circ. 18009),\ncollecting 2.8 ks of Photon Counting (PC) mode data between T0+115.2 ks\nand T0+121.6 ks. \n\nAn uncatalogued X-ray source has been detected close to the refined\nSwift/BAT error region (Cummings et al. GCN Circ. 18013), it is below\nthe RASS limit and shows no definitive signs of fading. Therefore, at\nthe present time we cannot confirm this as the afterglow. Details of\nthis source are given below:\n\n  RA (J2000.0):  83.2176  =  05:32:52.23\n  Dec (J2000.0): -46.9423  =  -46:56:32.4\n  Error: 4.7 arcsec (radius, 90% conf.)\n  Count-rate: 0.0141 [+0.0031, -0.0027] ct s^-1\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttp://www.swift.ac.uk/ToO_GRBs/00020542.\n\nSimultaneous with the Swift-XRT, the Swift-UVOT observed the field\nof GRB 150710B. Preliminary 3-sigma upper limits using the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373)\nfor the first finding chart (FC) exposure and subsequent exposures are:\n\n\nFilter\t       T_start(s)   T_stop(s)\t   Exp(s)\tMag\n\nwhite\t       115375\t    120586\t   662\t       >21.1\nv\t       115594\t    121561\t   957\t       >19.5\nu\t       115157\t    120072\t   915\t       >20.5\n\nThe magnitudes in the table are not corrected for the Galactic\nextinction due to the reddening of E(B-V) = 0.04 in the direction of\nthe burst (Schlegel et al. 1998).\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 18018,
  "createdOn": 1436697807000,
  "email": "andrea.melandri@brera.inaf.it",
  "subject": "GRB 150710B: Swift-XRT and Swift-UVOT observations",
  "submitter": "Andrea Melandri at INAF-OAB  <andrea.melandri@brera.inaf.it>",
  "eventId": "GRB 150710B"
}