{
  "body": "K. De (Caltech), M. M. Kasliwal (Caltech), I. Andreoni (Caltech) on\nbehalf of the ZTF and GROWTH collaborations\n\nWe performed forced photometry on ZTF images from 2019-08-15 UT at the\nlocation of DESGW-190814a reported in GCN #25336. The field was\nobserved 3 times in r-band and 2 times in g-band, and no source was\ndetected above a 5 sigma threshold at the reported location. The\ncombined 5 sigma upper limit at the location of the source is g = 21.1\nmag and r = 21.7 mag. Based on the i and z-band detections reported in\nGCN #25336, these upper limits indicate red colors of r - i > 1.1 mag\nand r - z > 1.4 mag.\n\nZTF and GROWTH are worldwide collaborations comprising Caltech, USA;\nIPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA;\nDESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech,\nJapan; IIT-B, India; IIA, India; LJMU, TTU, and USyd, Australia. ZTF\nacknowledges the generous support of the NSF under AST MSIP Grant No\n1440341. GROWTH acknowledges generous support of the NSF under PIRE\nGrant No 1545949. Alert distribution service provided by DIRAC@UW\n(Patterson et al. 2019). Alert filtering and follow-up co-ordination\nis being undertaken by the GROWTH marshal system (Kasliwal et al.\n2019). The ZTF forced-photometry service was funded under the\nHeising-Simons Foundation grant #12540303 (PI: Graham).",
  "version": 2,
  "circularId": 25345,
  "submitter": "Kishalay De at Caltech, GROWTH  <kde@astro.caltech.edu>",
  "bibcode": "2019GCN.25345....1D",
  "eventId": "GW190814",
  "editedBy": "courey.elliott@gmail.com",
  "subject": "Non-detection of DESGW-190814a in ZTF forced photometry",
  "editedOn": 1757442978442,
  "email": "kde@astro.caltech.edu",
  "createdOn": 1565888573000
}