TITLE: GCN CIRCULAR NUMBER: 18460 SUBJECT: LIGO/Virgo G194575: CQUEAN/LOAO observations DATE: 15/10/23 23:46:37 GMT FROM: Myungshin Im at Seoul National U M. Im, H. M. Lee, C. Choi, Y. Taak (SNU), S. Pak (KHU), H.-I. Sung (KASI), S. Ehgamberdiev (UBAI) on behalf of the KU (Korea-Uzbekistan) collaboration report: We observed several nearby bright galaxies within the error region of the possible GW event G194575 (GCN #18442), with the CQUEAN instrument on the McDonald observatory's 2.1m telescope (Park et al. 2012, PASP, 124, 839) and LOAO (Mt. Lemmon Astronomy Observatory) 1-m telescope (Lee et al. 2010, JKAS, 43, 95). CQUEAN covers a field of view of 4.7' by 4.7' centered on each galaxy and LOAO 1-m's field of view is 20' by 20'. The observations started at 2015-10-23 02:28 (UT) for CQUEAN, and 2015-10-23 07:08 (UT) for LOAO. Five galaxies were observed so far in R and I filters with 3 min exposure per filter. Name RA (J2000) Dec (J2000) Facility NGC 0099 00:23:59.4 +15:46:13 CQUEAN UGC 00099 00:10:40.9 +13:42:33 CQUEAN UGC 00119 00:13:03.1 +14:24:36 CQUEAN PGC 00282 00:04:01.5 -11:10:27 CQUEAN Arp 256 00:18:50.9 -10:22:36 CQUEAN NGC 337 00:59:50.1 -07:34:41 LOAO No obvious transient was found in the data taken so far. We plan to continue the observation of these and other nearby galaxies with our facilities. We thank the staff of LOAO for carrying out the observation.