[vsnet-grb-info 22219] LIGO/Virgo S190425z: No source found at UVOT source location at 6 hrs after LVC report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24318
SUBJECT: LIGO/Virgo S190425z: No source found at UVOT source location at 6 hrs after LVC report
DATE:    19/04/28 03:51:56 GMT
FROM:    Myungshin Im at Seoul Nat U  <mim at astro.snu.ac.kr>

Myungshin Im (SNU), Joonho Kim (SNU), Gregory S. H. Paek (SNU),  Chung-Uk
Lee (KASI), Seung-Lee Kim (KASI), Hyung Mok Lee (KASI), on behalf of a
larger collaboration

 We checked the KMTNet image at the location of the UVOT transient
(Breeveld et al., GCN Circ. 24296). The image was taken at 2019-04-25
14:05:29 (UT) at the KMTNet Siding Spring Observatory station, about 6
hours after the GW detection (LVC collaboration, GCN Circ. 24168) and 28
hours before the reported UVOT detection. We do not find any transient at
the UVOT location down to the preliminary magnitude limit of R<21.5
(3-sigma, point source). We do find the reported faint host galaxy
candidate in our KMTNet data (Palmese et al., GCN Circ. 24312)

 We thank the KMTNet operators for performing the observation.