TITLE: GCN CIRCULAR NUMBER: 24216 SUBJECT: LIGO/Virgo S190425z: KMTNet Observation DATE: 19/04/26 08:39:06 GMT FROM: Joonho Kim at Seoul National U. Joonho Kim (SNU), Myungshin Im (SNU), Chung-Uk Lee (KASI), Seung-Lee Kim (KASI), Gregory S.H. Paek (SNU), Gu Lim (SNU), Sophia Kim (SNU), Sungyong Hwang (SNU), Changsu Choi (SNU), Insu Paek (SNU), Suhyun Shin (SNU), Bomi Park (SNU), Soojong Pak (KHU), Hyung Mok Lee (KASI), Hyun-Il Sung (KASI), on behalf of a larger collaboration We observed 120 host galaxy candidates in the 50% localization area of the BNS merger candidate, S190425z, detected by LIGO/Virgo (GCN #24168) using the KMTNet 1.6m telescopes at SSO, SAAO, and CTIO. The observation started at 2019-04-25 12:28 UT, and the images were taken in R-band with 120 sec exposure time. No obvious transient has been identified. The list of the targets is given below. 16465757-1511349 16:48:57.00 -15:41:35.0 16483366-1520059 16:50:33.00 -15:50:06.0 17010310-1310184 17:03:03.00 -13:40:18.0 16372742-3044337 16:39:27.00 -31:14:34.0 16371371-2625123 16:39:13.00 -26:55:12.0 17033015-1301444 17:05:30.00 -13:31:44.0 17073219-1329173 17:09:32.00 -13:59:17.0 17432323-0325009 17:45:23.00 -03:55:01.0 16442971-2954301 16:46:29.00 -30:24:30.0 17404358-0608537 17:42:43.00 -06:38:54.0 17214929-0252202 17:23:49.00 -03:22:20.0 17042170-1300047 17:06:21.00 -13:30:05.0 16461237-0001563 16:48:12.00 00:31:56.0 17052059-1354058 17:07:20.00 -14:24:06.0 16551898-0715115 16:57:19.00 -07:45:12.0 16445871-0011441 16:46:58.00 00:41:44.0 17075556-0235287 17:09:55.00 -03:05:29.0 16365968-3055576 16:38:59.00 -31:25:58.0 17281431-0406583 17:30:14.00 -04:36:58.0 17343248-0659255 17:36:32.00 -07:29:26.0 16535846-2149010 16:55:58.00 -22:19:01.0 17081503-1333425 17:10:15.00 -14:03:43.0 16460002-1309243 16:48:00.00 -13:39:24.0 16350424-3054512 16:37:04.00 -31:24:51.0 16263236-3441507 16:28:32.00 -35:11:51.0 17222779-0505074 17:24:27.00 -05:35:07.0 16573248-2246391 16:59:32.00 -23:16:39.0 17030983-1247564 17:05:09.00 -13:17:56.0 17423503-0657581 17:44:35.00 -07:27:58.0 16473633-1509476 16:49:36.00 -15:39:48.0 16352839-2500426 16:37:28.00 -25:30:43.0 17161661-0811018 17:18:16.00 -08:41:02.0 17200620-0351381 17:22:06.00 -04:21:38.0 16512494-2254080 16:53:24.00 -23:24:08.0 16464891-0037544 16:48:48.00 -01:07:54.0 16452069-2037012 16:47:20.00 -21:07:01.0 16521781-2304586 16:54:17.00 -23:34:59.0 16495473-0636040 16:51:54.00 -07:06:04.0 17265688-0317354 17:28:56.00 -03:47:35.0 16471866-1456270 16:49:18.00 -15:26:27.0 17295066-0702448 17:31:50.00 -07:32:45.0 16532852-2312115 16:55:28.00 -23:42:12.0 16553496-0723587 16:57:35.00 -07:53:59.0 16435593-2529433 16:45:55.00 -25:59:43.0 17455093-0235298 17:47:50.00 -03:05:30.0 16563795-0712066 16:58:38.00 -07:42:07.0 04091988-5327483 04:11:19.00 -53:57:48.0 17073496-1637323 17:09:35.00 -17:07:32.0 17041344-1318227 17:06:13.00 -13:48:23.0 16440857-2854193 16:46:08.00 -29:24:19.0 16481805-1831303 16:50:18.00 -19:01:30.0 16545475-2329211 16:56:54.00 -23:59:21.0 17165559-0453060 17:18:55.00 -05:23:06.0 16502768+0005349 16:52:27.00 00:24:25.0 16550792-1801417 16:57:07.00 -18:31:42.0 16433259-2024343 16:45:32.00 -20:54:34.0 04171577-3858578 04:19:15.00 -39:28:58.0 16473469-2121514 16:49:34.00 -21:51:51.0 16301048-2822223 16:32:10.00 -28:52:22.0 17184030-0628489 17:20:40.00 -06:58:49.0 16480630-0037546 16:50:06.00 -01:07:55.0 17144035+0007545 17:16:40.00 00:22:05.0 04073433-5305504 04:09:34.00 -53:35:50.0 16482162-0407526 16:50:21.00 -04:37:53.0 17145452-1317481 17:16:54.00 -13:47:48.0 16472494-1813304 16:49:24.00 -18:43:30.0 16505041+0015538 16:52:50.00 00:14:06.0 16514833-1253444 16:53:48.00 -13:23:44.0 16553956-2238314 16:57:39.00 -23:08:31.0 16463548-2310136 16:48:35.00 -23:40:14.0 16595401-0445514 17:01:54.00 -05:15:51.0 16552065-0650095 16:57:20.00 -07:20:10.0 17235027-0820347 17:25:50.00 -08:50:35.0 17381357-0542425 17:40:13.00 -06:12:43.0 17475210-1053145 17:49:52.00 -11:23:15.0 17060471-1648304 17:08:04.00 -17:18:30.0 17465488-1053325 17:48:54.00 -11:23:33.0 17363676-0626500 17:38:36.00 -06:56:50.0 17420617-0926068 17:44:06.00 -09:56:07.0 16321778-3137378 16:34:17.00 -32:07:38.0 16501134-2227582 16:52:11.00 -22:57:58.0 16401811-2559083 16:42:18.00 -26:29:08.0 16305178-2811517 16:32:51.00 -28:41:52.0 16485650-2222422 16:50:56.00 -22:52:42.0 16461899-2105509 16:48:19.00 -21:35:51.0 17045066-1327563 17:06:50.00 -13:57:56.0 16500186-1754372 16:52:01.00 -18:24:37.0 16474585-2118434 16:49:45.00 -21:48:43.0 16480372-1159506 16:50:03.00 -12:29:51.0 04234351-3757099 04:25:43.00 -38:27:10.0 16402247-2211300 16:42:22.00 -22:41:30.0 16571736-1918597 16:59:17.00 -19:49:00.0 17080532-1638036 17:10:05.00 -17:08:04.0 17470574-0313407 17:49:05.00 -03:43:41.0 16501038-0833255 16:52:10.00 -09:03:26.0 17061698-0319254 17:08:17.00 -03:49:25.0 17012529-0757290 17:03:25.00 -08:27:29.0 16381154-3012590 16:40:11.00 -30:42:59.0 16435072-1829093 16:45:50.00 -18:59:09.0 17084763-1142374 17:10:47.00 -12:12:37.0 17275586-0352269 17:29:55.00 -04:22:27.0 16313752-2805243 16:33:37.00 -28:35:24.0 17211157-0330159 17:23:11.00 -04:00:16.0 17193554-0510154 17:21:35.00 -05:40:15.0 17282222-0311222 17:30:22.00 -03:41:22.0 16521779-1513294 16:54:17.00 -15:43:29.0 16433655-1750124 16:45:36.00 -18:20:12.0 16334229-3259350 16:35:42.00 -33:29:35.0 16392252-2303588 16:41:22.00 -23:33:59.0 17181392-0019465 17:20:13.00 00:49:47.0 17102195-0424569 17:12:22.00 -04:54:57.0 16522199-0744343 16:54:22.00 -08:14:34.0 17243739-0506362 17:26:37.00 -05:36:36.0 04005870-5341349 04:02:58.00 -54:11:35.0 16504578-2224476 16:52:45.00 -22:54:48.0 16280047-3312041 16:30:00.00 -33:42:04.0 16492033-1525363 16:51:20.00 -15:55:36.0 17453210-0452328 17:47:32.00 -05:22:33.0 17151656-1310140 17:17:16.00 -13:40:14.0 16554312-0420465 16:57:43.00 -04:50:47.0 -- -- Joonho Kim joonho@astro.snu.ac.kr Graduate Student, Astronomy Program, Dept. of Physics & Astronomy, Seoul National University, Seoul, Korea ᐧ