{
  "bibcode": "2019GCN.25720....1P",
  "body": "D. A. Perley and C. M. Copperwheat (LJMU) report on behalf of the GROWTH \ncollaboration:\n\nWe acquired imaging and spectroscopy of ZTF19abyfazm/AT2019pwa (Anand et \nal., GCN 25706), an optical transient within the error region of \ngravitational wave trigger S190910d (LVC et al. GCN 25695), with the 2m \nLiverpool Telescope.  A sequence of 60-second images was acquired in g, \nr, and i filters using IO:O, followed by 2x500s of spectroscopy with \nSPRAT, between 20:53 and 21:20 on 2019-09-10 (UT).\n\nThe source remains bright and blue, although has faded slightly since \nthe time of ZTF discovery (we measure AB magnitudes of g=17.95, r=18.30, \ni=18.65 at approximately MJD=58736.87).  No significant absorption or \nemission features are visible in the spectrum.  We conclude that this \nsource is likely the eruption of an uncatalogued cataclysmic variable \nwithin our Galaxy, although further monitoring will be needed to confirm \nthis.\n\nWe thank the MOPTOP commissioning team for their patience while \nacquiring these observations.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nDisclaimerNone",
  "circularId": 25720,
  "createdOn": 1568152102000,
  "email": "d.a.perley@ljmu.ac.uk",
  "subject": "LIGO/Virgo S190910d: Liverpool Telescope spectroscopy of ZTF19abyfazm",
  "submitter": "Daniel Perley at Liverpool JMU  <d.a.perley@ljmu.ac.uk>",
  "eventId": "LIGO/Virgo S190910d"
}