{
  "bibcode": "2019GCN.24284....1H",
  "body": "M. Hankins (Caltech), K. De (Caltech), M. Coughlin (Caltech), M. M.\nKasliwal (Caltech), S. M. Adams (Caltech), I. Andreoni (Caltech), S.\nAnand (Caltech), L. Singer (NASA GSFC), T. Ahumada (UMD),  A. Moore\n(ANU), J. Soon (ANU), M. Ashley (UNSW), T. Travouillon (ANU)\n\nreport on behalf of the Palomar Gattini-IR team and the larger GROWTH\n(Global Relay of Observatories Watching Transients Happen)\ncollaboration\n\nWe report wide-field near-infrared follow-up observations of the\nlocalization region of the gravitational wave event S190426c (GCN\n#24237) by the Palomar Gattini-IR survey (Moore and Kasliwal 2019).\nGattini-IR is a newly commissioned near-IR camera with a field of view\nof 25 square degrees mounted on a robotic 30 cm telescope at Palomar\nobservatory.\n\nWe started customized Target of Opportunity observations at UT\n2019-04-27 03:31. The tiling was optimally determined and triggered\nusing the GROWTH Target of Opportunity marshal (Coughlin et al. 2019a,\nKasliwal et al. 2019b). We imaged a total of 2200 square degrees,\ncovering 92% of the probability region of the event for 1 to 4 epochs\nuntil UT 2019-04-27 13:21. Each field visit consisted of a sequence of\n8 dithers of 8 second exposures each on the field, which were\nprocessed and stacked with the Palomar Gattini-IR data reduction\npipeline (De et al., in prep.). The typical limiting magnitude of each\nstacked epoch (64 second exposure time) was between 14.5 and 15 AB mag\nin J-band, and shallower than usual due to poor weather conditions.\nTransient vetting is ongoing and any viable counterparts will be\nannounced.",
  "circularId": 24284,
  "createdOn": 1556376440000,
  "email": "kde@astro.caltech.edu",
  "subject": "LIGO/Virgo S190426c: Infrared Wide-field Search with Palomar Gattini-IR",
  "submitter": "Kishalay De at Caltech, GROWTH  <kde@astro.caltech.edu>",
  "eventId": "LIGO/Virgo S190426c"
}