[vsnet-grb-info 22084] LIGO/Virgo S190425z: SQUEAN Observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24183
SUBJECT: LIGO/Virgo S190425z: SQUEAN Observation
DATE:    19/04/25 15:11:29 GMT
FROM:    Myungshin Im at Seoul Nat U  <mim at astro.snu.ac.kr>

Myungshin Im (SNU), Gregory S. H. Paek (SNU),  Gu Lim (SNU), Insu Paek
(SNU), Suhyun Shin (SNU), Joonho Kim (SNU), Soojong Pak (KHU), Sungyong
Hwang (SNU), Bomi Park (SNU), Sophia Kim (SNU), Changsu Choi (SNU),
Chung-Uk Lee (KASI), Seung-Lee Kim (KASI), Hyung Mok Lee (KASI), on behalf
of a larger collaboration

We observed 30 host galaxy candidates in the 90% localization area of the
BNS merger candidate, S190425z, detected by LIGO/Virgo (GCN #24168) using
the SQUEAN instrument on the McDonald observatory's 2.1m telescope. The
observation started at 2019-4-25 09:38:57 UT, and the images were taken in
i-band with 120 sec exposure time. No obvious transient has been identified
to a preliminary 3-sigma depth of i=20.0 AB mag. The list of the inspected
targets is given below.

NAME       RA DEC
IC4587                      239.965057  25.940653
UGC10153                240.83136    20.636812
UGC10320                244.530502  21.066381
PGC58097                246.408646  16.455
2MASS+16590728-0544311  254.780334  -5.741986
UGC10016                236.370865  26.603144
PGC55801                235.374939  27.986473
PGC55774                235.152664  28.512449
2MASS+16585063-1557280  254.710999  -15.957801
2MASS+16582619-0319463  254.609146  -3.329548
2MASS+17004803-0510264  255.200165  -5.17402
2MASS+16572382-0147498  254.349258  -1.797175
2MASS+16574955-0156027  254.456467  -1.934085
2MASS+17030866-0237020  255.786118  -2.617223
2MASS+16550989+0551321  253.791245  5.858919
2MASS+16540875-0738073  253.536499  -7.635365
UGC10678                255.993729  24.177513
PGC58992                251.901932  8.752961
PGC1470081              247.533737  14.903552
PGC57472                243.084732  23.001947
PGC1688132              240.935242  23.482073
NGC6097                  243.608948  35.109116
NGC5567                  214.823303  35.138004
PGC51918                217.984253  33.642612
PGC1277972              252.051498  5.089275
PGC1112217              255.254517  -1.705736
IC1255                  260.77243    12.69542
6dFJ1654568-153135      253.736633  -15.526299
2MASS+16520774-1703135  253.032288  -17.053755
PGC59300                254.266769  5.372032