TITLE:   GCN CIRCULAR
NUMBER:  25389
SUBJECT: LIGO/Virgo S190814bv: No candidates found in J-GEM follow-up observations
DATE:    19/08/18 03:07:50 GMT
FROM:    Mahito Sasada at Hiroshima University  <sasadam@hiroshima-u.ac.jp>

Shikauchi, M. (U. Tokyo); Tanaka, M. (Tohoku U.); Kamei, Y.; Fujii H.;
Tristram P.; Abe F. (Nagoya U.); Tanaka Y. (Osaka U.); Nakaoka, T.; Sasada,
M. (Hiroshima U.); Yanagisawa, K.; Yoshida, M. (NAOJ); Takarada, T.
(Saitama U.); Onozato, H. (U. Hyogo); Murata, K. L. (Tokyo Tech.); Itoh, R.
(Bisei Astronomical observatory); Utsumi, Y. (Stanford/SLAC) on behalf of
J-GEM collaboration

We report imaging observations for the gravitational wave event S190814bv
(Mo et al, GCN Circ. 25324). We began our first set of observations and
reported in Nakaoka et al., GCN Circ. 25377. This report is the second set
of observations from 2019-08-17 14:05 UT  about 2.7 days after the event
and ended at 2019-08-17 18:32 UT.

We performed galaxy-targeted observations for 23 galaxies (see the table
below) selected from the GLADE catalog (Dalya et al. 2018) in the
probability skymap of S190814bv using the following telescopes and
instruments.

We found no apparent transient objects in these galaxies to 5 sigma
limiting magnitudes in the AB system listed below.

    galid         ra dec   g r R i    z J H     obsid

--------------- -------- -------- ---- ---- ---- ---- ---- ---- ----
--------------------------

GL004822-250737 12.0911  -25.1268 18.9 19.4 19.3 18.7 --   -- 19.1
BandC-Tripol

GL005130-243833 12.8744  -24.6425 99.9 99.9 12.9 99.9 --   -- --
BandC-Tripol

GL005242-254402 13.1733  -25.7339 99.9 99.9 18.3 99.9  --   -- 18.9
BandC-Tripol,Kanata-HONIR

GL004705-241419 11.7719  -24.2387 13.6 19.2 -- 18.3 99.9 --   --
SaCRA-MuSaSHI,BandC-Tripol

GL005111-255715 12.7938  -25.9542 19.3 19.5 -- 18.8 --   -- --
BandC-Tripol

GL005119-261005 12.8282  -26.1681 19.3 15.0 -- 13.2 --   -- --
BandC-Tripol

GL004242-214627 10.6763  -21.7741 -- -- 17.5 --   -- -- 17.3
Kanata-HONIR

GL004915-235131 12.3111  -23.8585 99.9 99.9 19.0 99.9 --   -- 19.6
BandC-Tripol

GL004858-254136 12.2428  -25.6934 19.3 19.3 -- 18.8 --   -- --
BandC-Tripol

GL004855-250410 12.229   -25.0695 19.4 19.6 -- 18.3 --   -- --
BandC-Tripol

GL004923-263027 12.3463  -26.5075 19.6 19.4 -- 18.2 --   18.1 --
BandC-Tripol

GL004933-263219 12.3856  -26.5386 19.6 19.4 -- 18.2 --   18.1 --
BandC-Tripol

GL235701-344533 359.2529 -34.7592 --   -- 18.9 -- -- -- 18.9
Kanata-HONIR

GL005247-254018 13.1945  -25.6716 -- -- 18.3 --   -- -- 18.9
Kanata-HONIR

GL004240-214801 10.6664  -21.8002 -- -- 17.5 --   -- -- 17.3
Kanata-HONIR

GL005116-255739 12.8157  -25.9609 19.3 19.5 -- 18.8 --   -- --
BandC-Tripol

GL005103-255857 12.7644  -25.9824 19.3 19.5 -- 18.8 --   -- --
BandC-Tripol

GL012733-044059 21.8892  -4.6829 -- -- 19.4 --   -- -- 18.6
Kanata-HONIR

GL004610-251248 11.5434  -25.2132 -- -- -- --   -- 18.0 --
OAOWFC

GL013640-012345 24.166   -1.3958 -- -- 17.4 --   -- -- 16.9
Kanata-HONIR

GL004729-252626 11.8706  -25.4407 99.9 99.9 19.3 16.9 --   18.0 18.5
BandC-Tripol,OAOWFC

GL004928-263218 12.3648  -26.5383 19.6 19.4 -- 18.2 --   18.1 --
BandC-Tripol

GL235701-344050 359.2528 -34.6806 --   -- 18.9 -- -- -- 18.9
Kanata-HONIR

BandC-Tripol: 61 cm Boller & Chivens telescope at Mt. John Observatory in
New Zealand (B&C) and a three color imager Tripole5 (g, r, i)

Kanata-HONIR: 150 cm Kanata telescope at Higashi-Hiroshima Observatory and
HONIR -- a 2 channel imager (Rc and H or J) (Akitaya et al. 2014, Proc.
SPIE 9147, 91474O)

OAOWFC: 91 cm Okayama Astrophysical Observatory NIR Wide Field Camera,
OAOWFC (J) (Yanagisawa, K., et al. 2016, Proc. SPIE, 9908, 99085D)

SaCRA-MuSaSHI: 55 cm SaCRA telescope at Saitama University and MuSaSHI (r,
i, z)

Magnitudes of 99.9 above are the cases our pipeline failed to compute
limiting magnitudes.

OAOWFC also observed a couple of candidates reported in Andreoni et al, GCN
Circ. 25362, and identified an object at the same position reported as
DG19hqpgc. However, this source is visible in the PS1 archival image.