[vsnet-grb-info 25020] LIGO/Virgo S200213t: No EM counterparts found from continued GECKO observation of host galaxy candidates

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27119
SUBJECT: LIGO/Virgo S200213t: No EM counterparts found from continued GECKO observation of host galaxy candidates
DATE:    20/02/18 08:36:58 GMT
FROM:    Gregory SungHak Paek at SNU  <shpaek at astro.snu.ac.kr>

Gregory S.H. Paek (SNU), Myungshin Im (SNU), Hyun-Il Sung (KASI), Gu Lim
(SNU), Joonho Kim (SNU), 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 GECKO team

 We continued follow-up observation for host galaxy candidates (Paek et al,
GCN #27067) with the 1.0-m telescope at the Lemonsan Optical Astronomical
Observatory(LOAO), the 1.0-m telescope at the Deokheung Optical Astronomy
Observatory(DOAO), and the 0.61-m telescope ate the Sobaeksan Optical
Astronomy Observatory(SOAO) in the initial and updated localization area of
S200213t (Singer et al, GCN #27042) and overlapped neutrino detection area
(Hussain et al, GCN #27043).

 Each image was taken in R-band with 30 minutes exposure time. No obvious
transient has been identified. The list of the inspected targets is given
below, and upper limit(UL) is for 3-sigma detection.

OBSERVATORY          NAME          DISTANCE[Mpc]         DATE-OBS    DEL_JD
FILTER  UL[AB]   NOTE
----------- ---------------------- ------------- ------------------- ------
------ ------- --------
       LOAO               PGC11312           169 2020-02-14T02:37:28  0.93
      R  21.676 neutrino
       LOAO               UGC02483            91 2020-02-14T04:04:08  1.00
      R  21.511 neutrino
       LOAO 2MASS+03014097+3153413            97 2020-02-14T04:43:56  1.02
      R  21.163 neutrino
       LOAO 2MASS+03012583+3135093           254 2020-02-14T03:15:37  0.96
      R  21.626 neutrino
       LOAO 2MASS+00585413+5236357           138 2020-02-15T03:30:47  1.97
      R  20.945     -
       LOAO 2MASS+01154286+5559475           174 2020-02-15T04:15:28  2.0
     R  21.327     -
       LOAO                PGC7302           100 2020-02-15T04:50:59  2.02
      R  20.751     -
       LOAO 2MASS+01192705+5831151           154 2020-02-15T02:37:38  1.93
      R  20.967     -
       LOAO 2MASS+01183038+5156442           127 2020-02-16T03:50:58  2.99
      R   21.21     -
       LOAO              PGC137452           179 2020-02-16T03:15:08  2.96
      R   21.15     -
       LOAO                PGC7302           100 2020-02-16T02:36:58  2.93
      R   21.06     -
       LOAO              PGC137873           174 2020-02-16T04:35:36  3.02
      R  20.952     -
       LOAO                NGC0020            77 2020-02-18T02:35:55  4.9
     R  20.839     -
       LOAO 2MASS+00583689+5137088           121 2020-02-18T03:15:05  4.96
      R  21.517     -
---------------------------------------------------------------------------------------------------
       DOAO               PGC11312           169 2020-02-14T12:05:30  1.32
      R  21.016 neutrino
       DOAO 2MASS+03012583+3135093           254 2020-02-14T12:36:39  1.35
      R   19.96 neutrino
       DOAO               UGC02483            91 2020-02-14T13:01:41  1.36
      R  18.646 neutrino
---------------------------------------------------------------------------------------------------
       SOAO               PGC11312           169 2020-02-14T10:27:54  1.26
      R  21.432 neutrino
       SOAO 2MASS+03012583+3135093           254 2020-02-14T10:59:41  1.28
      R  21.332 neutrino
       SOAO               UGC02483            91 2020-02-14T11:33:53  1.30
      R  21.062 neutrino
       SOAO 2MASS+03014097+3153413            97 2020-02-14T12:07:19  1.33
      R   20.88 neutrino

We thank the LOAO opertator for performing the observation.

Gravitational-wave EM Counterpart Korean Observatory (GECKO) is a network
of 10+ 0.5m to 1m class telescopes over the world.