{
  "bibcode": "2019GCN.24314....1P",
  "body": "D. A. Perley, C. M. Copperwheat, and K. L. Taggart (LJMU) report on \nbehalf of the Global Relay of Observatories Watching Transients Happen \n(GROWTH) collaboration:\n\nWe acquired a series of 60-second exposures of ZTF19aasckkq (Anand et \nal., GCN 24311), an optical transient in the error region of LIGO/Virgo \nS190425z (GCN 24168), using the IO:O imager on the 2m Liverpool \nTelescope in the u, g, r, i, and z filters between 03:17:56 and 03:30:00 \nUT on 2019-04-27.\n\nThe transient is detected with the following magnitudes (measured after \nimage subtraction and calibrated relative to PS1):\n\nJD          \tmagnitude\n2458600.6384\tg = 20.66 +/- 0.18\n2458600.6395\tr = 20.37 +/- 0.17\n2458600.6406\ti = 20.28 +/- 0.23\n2458600.6416\tz = 20.09 +/- 0.38\n\nIt is not detected in u-band.  These suggest a moderately but not \nextremely red transient and show no obvious evolution relative to the \nZTF imaging on 2019-04-26 (g = 20.86 +/- 0.18).\n\n\n\n\n\n\n\n\n\n\n\n\n\nDisclaimerNone",
  "circularId": 24314,
  "createdOn": 1556412378000,
  "email": "d.a.perley@ljmu.ac.uk",
  "subject": "LIGO/Virgo S190425z: Liverpool Telescope imaging of ZTF19aasckkq",
  "submitter": "Daniel Perley at Liverpool JMU  <d.a.perley@ljmu.ac.uk>",
  "eventId": "LIGO/Virgo S190425z"
}