{
  "bibcode": "2019GCN.24324....1H",
  "body": "Y.-D. Hu, A. J. Castro-Tirado, X.-Y. Li, A. Ayala, E. Fernandez-Garcia\nand F. J. Aceituno (IAA-CSIC), R. Sanchez-Ramirez (INAF-IAPS), M. D.\nCaballero-Garcia (ASU-CAS) and N. Castro-Rodriguez (GRANTECAN, IAC,\nULL), on behalf of a larger collaboration, report:\n\nFollowing the detection of Swift/UVOT of a transient (Breeveld et al.,\nGCN 24296) within the error area of the GW event S190425z (LIGO\nScientific Collaboration and the Virgo Collaboration, GCN  24168), we\nobserved the target with the 1.5m telescope at the  Observatorio de\nSierra Nevada (Spain) in the R-band, starting on Apr  27, 03:44 UT. The\nco-add of 3 frames (600s each) revealed no object down to 22.3 mag at\nthe position of the UVOT source. Deeper images were taken at the 10.4m\nGTC telescope equipped with OSIRIS in La Palma (Spain) starting on Apr\n27, 05:11 UT. The potential host galaxy reported by Palmese et al., GCN\n24312) is detected in our 60s frames with r = 22.8+-0.2.\n\n\nWe acknowledge the excellent support from the GTC staff.",
  "circularId": 24324,
  "createdOn": 1556436533000,
  "email": "ajct@iaa.es",
  "subject": "LIGO/Virgo S190425z: 1.5m OSN and 10.4m imaging of the UVOT source field",
  "submitter": "Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>",
  "eventId": "LIGO/Virgo S190425z"
}