{
  "bibcode": "2019GCN.26431....1T",
  "body": "Han-Jie Tan (NCU), Albert Kong (NTHU), Chow-Choong Ngeow (NCU),\nWing-Huen Ip (NCU)\n\nOn behalf of the Global Relay of Observatories Watching Transients\nHappen (GROWTH) collaborations\n\nWe report the photometric measurements of the Type II supernova\nZTF19acykzsk/AT2019wqj previously associated with the gravitational\nwave event S191213g (GCN #26402, #26424) using the Lulin One-meter\nTelescope (LOT) in Taiwan. The observations were conducted using g, r,\ni filters starting at 2019-12-14 10:13:37 UT and were repeated 7 hours\nlater. Preliminary photometry was obtained by calibrating with the\nAPASS catalog.\n\nIts r magnitude is slightly fainter than the observation by Andreoni\net al. (GCN #26424) ~14hr earlier and suggests a slow decay. We\nconfirm the report from Andreoni of a red color g-r=0.26.\n\nSummary of ZTF19acykzsk/AT2019wqj :\nUT                     JD          Filter    Exp(s)      Mag (AB)\n2019-12-14 10:16:07  2458831.928   g         300         19.37+/-0.10\n2019-12-14 10:21:13  2458831.931   r          300         19.11+/-0.16\n2019-12-14 10:26:20  2458831.935   i          300         19.10+/-0.11\n2019-12-14 17:21:07  2458832.223   g        300*2       19.51+/-0.11\n2019-12-14 17:32:47  2458832.231   r         300*2       19.10+/-0.14\n2019-12-14 17:35:24  2458832.233   i          300         19.06+/-0.24\n\nWe would like to thank the staff in Lulin Observatory for helping the\nobservations.",
  "circularId": 26431,
  "createdOn": 1576376248000,
  "email": "akhkong@gmail.com",
  "subject": "LIGO/Virgo S191213g: Lulin Follow-up Observations of ZTF19acykzsk/AT2019wqj",
  "submitter": "Albert Kong at NTHU  <akhkong@gmail.com>",
  "eventId": "LIGO/Virgo S191213g"
}