{
  "bibcode": "2019GCN.24334....1T",
  "body": "N. R. Tanvir (U. Leicester), C. Gonzalez-Fernandez (IoA, U. Cambridge),\nA. J. Levan (Radbound U.), D. B. Malesani (DAWN/NBI and DARK/NBI),\nP. A. Evans (U. Leicester) report on behalf of the VINROUGE collaboration:\n\nThe location of the variable source reported in Swift/UVOT\nobservations (Breeveld et al., GCN 24296) appears in a field\nimaged by the 4m VISTA telescope as part of our follow-up of the\nbinary neutron star merger S190425z (LVC collaboration, GCN 24168).\nThe observations were obtained on 2019-04-28 07:55 UT in the 2.15 um\nKs-filter.  We find no significant flux at the transient location,\ncorresponding to a 2-sigma limiting magnitude of K(AB)~20.6.\nThe absence of a detection in these observations suggests that\neither it has rapidly faded and/or is not very red in UV-nIR colours.\n\nThe faint constant source, close to the UVOT position, noted by \nPalmese et al. (GCN 24312), is marginally visible in our imaging,\nat about the 2-sigma level.",
  "circularId": 24334,
  "createdOn": 1556487026000,
  "email": "nrt3@star.le.ac.uk",
  "subject": "LIGO/Virgo S190425z: VISTA K-band observations of the Swift/UVOT Transient",
  "submitter": "Nial Tanvir at U.Leicester  <nrt3@star.le.ac.uk>",
  "eventId": "LIGO/Virgo S190425z"
}