{
  "bibcode": "2017GCN.21648....1M",
  "body": "R. Margutti, W. Fong (Northwestern), E. Berger (Harvard), R. Chornock (Ohio\nUniversity), P. Cowperthwaite, K. D. Alexander (Harvard)\n\nWe observed the field of the EM counterpart to the LVC trigger G298048 with\nthe Chandra X-ray Observatory (CXO) starting on 2017-08-19T17:10:09UT  (PI\nFong).\nWe do not find evidence for significant X-ray emission at the location of\nthe optical transient (RA= 13:09:48.08, Dec= -23:22:53.2,  Coulter et al.\nLVC GCN 21529; Allam et al., LVC GCN 21530; Sheng Yang et al., LVC GCN\n21531; Chambers et al. LVC GCN 21553).\n\nAn extended X-ray source is clearly detected at:\nRA= 13:09:47.7\ndec= -23:23:02.0\n\nThis position is consistent with the radio source that we identified in\nAlexander et al. (LVC GCN 21589) and it is centered on the host-galaxy\noptical position. Based on preliminary analysis, we estimate a flux ~1e-14\nerg/s/cm2 in the 0.3-10 keV band.\n\nThe CXO X-ray source lies outside the 90% containment, but within the\n3-sigma containment, of the localization region of the Swift-XRT source\n(Evans et al., LVC GCN 21612). The flux inferred by Evans et al., Fx=2.6\n(+1.1, -0.9) e-14 erg/cm^2/s is also consistent with our results. We thus\nsuggest that the X-ray source identified by Swift-XRT is most likely\nemission from the host galaxy.\n\nWe thank Belinda Wilkes and the entire Chandra team for their great support\nwith these observations.",
  "circularId": 21648,
  "createdOn": 1503425183000,
  "email": "rafmargutti@gmail.com",
  "subject": "LIGO/Virgo G298048: Chandra X-ray observations",
  "submitter": "Raffaella Margutti at Northwestern U  <rafmargutti@gmail.com>",
  "eventId": "LIGO/Virgo G298048"
}