GCN Circular 36265

Tomoki Morokuma (ARC/Chitech), Nozomu Tominaga, Ichi Tanaka, and Michitoshi Yoshida (NAOJ) report on behalf of Japanese Collaboration for Gravitational-Wave Electro-Magnetic Follow-up (J-GEM) collaboration: 

We conducted near-infrared imaging observations of galaxies in the localization region of the gravitational wave event LIGO/Virgo/KAGRA S240422ed (GCN 36236
Not found
 
 
) using the Multi-Object InfraRed Camera and Spectrograph (MOIRCS; 3.9x6.9 arcmin field-of-view; Suzuki, R. et al. 2008, PASJ, 60, 1347; Ichikawa, T. et al. 2006, SPIE, 6269, 38) on the 8.2-m Subaru telescope. We started our observations at UT 2024-04-23 05:21, about 7.8 hours after the event. 

We observed 100 galaxies in total in Y and Ks bands with 15-32 sec exposures. The target galaxies are selected from the list of potential host galaxies for this event (Dalya, G. et al. 2019, GCN, 24171) around the central coordinate of the localization. The list of the galaxies we observed is shown in the table below. The data were reduced with the MCSRED (Tanaka, I. et al. 2011, PASJ, 63, S415) and detailed examination of the obtained data is now underway. 

Observed galaxies
GL075344-262712 07:53:43.70 -26:27:11.52 
GL075620-312150 07:56:19.68 -31:21:49.68 
GL075851-343144 07:58:51.24 -34:31:44.04 
GL075925-273216 07:59:25.05 -27:32:16.44 
GL080201-305049 08:02:00.74 -30:50:48.84 
GL080236-340407 08:02:35.52 -34:04:07.32 
GL080242-314115 08:02:42.28 -31:41:15.00 
GL080305-261201 08:03:05.16 -26:12:00.72 
GL080334-330027 08:03:34.20 -33:00:26.64 
GL080339-330139 08:03:38.56 -33:01:38.64 
GL080436-250927 08:04:35.59 -25:09:27.00 
GL080442-265813 08:04:41.68 -26:58:13.08 
GL080501-324313 08:05:01.15 -32:43:13.08 
GL080522-322313 08:05:22.39 -32:23:12.84 
GL080528-315445 08:05:28.27 -31:54:45.00 
GL080542-315238 08:05:42.48 -31:52:37.92 
GL080550-261139 08:05:50.18 -26:11:39.12 
GL080551-255848 08:05:50.71 -25:58:48.00 
GL080556-303009 08:05:55.60 -30:30:09.36 
GL080620-312607 08:06:20.18 -31:26:07.44 
GL080633-300736 08:06:32.59 -30:07:35.76 
GL080702-314302 08:07:01.70 -31:43:02.28 
GL080708-290851 08:07:07.89 -29:08:51.36 
GL080724-264036 08:07:23.56 -26:40:36.48 
GL080726-292734 08:07:25.84 -29:27:34.56 
GL080747-275243 08:07:47.13 -27:52:43.32 
GL080749-255717 08:07:49.44 -25:57:17.28 
GL080750-290734 08:07:49.75 -29:07:34.32 
GL080826-310301 08:08:25.68 -31:03:00.72 
GL080850-243120 08:08:49.87 -24:31:20.28 
GL080855-300836 08:08:54.60 -30:08:36.24 
GL080855-301552 08:08:55.36 -30:15:52.56 
GL080903-242702 08:09:02.54 -24:27:02.16 
GL080906-270633 08:09:06.31 -27:06:33.12 
GL080926-240558 08:09:25.70 -24:05:58.20 
GL081042-304908 08:10:41.85 -30:49:07.68 
GL081051-330116 08:10:51.14 -33:01:15.60 
GL081055-305129 08:10:55.03 -30:51:28.80 
GL081106-305231 08:11:05.59 -30:52:30.72 
GL081106-234121 08:11:06.02 -23:41:21.12 
GL081116-305424 08:11:16.39 -30:54:23.76 
GL081119-254058 08:11:19.27 -25:40:58.44 
GL081123-321104 08:11:23.25 -32:11:04.20 
GL081135-321943 08:11:35.04 -32:19:42.96 
GL081155-235315 08:11:54.76 -23:53:14.64 
GL081221-244709 08:12:20.61 -24:47:08.88 
GL081235-203457 08:12:34.65 -20:34:57.00 
GL081239-315224 08:12:38.66 -31:52:24.24 
GL081240-312406 08:12:39.50 -31:24:06.12 
GL081248-313414 08:12:48.16 -31:34:14.16 
GL081301-285304 08:13:00.96 -28:53:03.48 
GL081312-280235 08:13:11.52 -28:02:34.44 
GL081338-205947 08:13:37.75 -20:59:47.04 
GL081352-290731 08:13:51.67 -29:07:31.08 
GL081403-341622 08:14:03.26 -34:16:21.72 
GL081413-332820 08:14:13.00 -33:28:19.92 
GL081419-322317 08:14:19.10 -32:23:16.80 
GL081425-322500 08:14:24.79 -32:25:00.12 
GL081435-234301 08:14:35.49 -23:43:00.84 
GL081450-224615 08:14:50.18 -22:46:14.88 
GL081452-292944 08:14:51.50 -29:29:44.16 
GL081502-331829 08:15:01.77 -33:18:28.80 
GL081502-225349 08:15:02.01 -22:53:48.84 
GL081514-235249 08:15:13.89 -23:52:49.08 
GL081521-330708 08:15:21.04 -33:07:08.04 
GL081529-304751 08:15:29.25 -30:47:51.00 
GL081547-283019 08:15:47.13 -28:30:19.08 
GL081549-233224 08:15:48.52 -23:32:23.64 
GL081551-224821 08:15:50.52 -22:48:20.88 
GL081600-225336 08:16:00.36 -22:53:35.88 
GL081608-315204 08:16:08.20 -31:52:04.44 
GL081614-213024 08:16:13.53 -21:30:23.76 
GL081628-274822 08:16:28.05 -27:48:22.32 
GL081634-203944 08:16:33.60 -20:39:43.92 
GL081638-245039 08:16:38.16 -24:50:39.48 
GL081645-203612 08:16:45.48 -20:36:11.88 
GL081658-255212 08:16:58.29 -25:52:12.00 
GL081703-234745 08:17:02.66 -23:47:44.52 
GL081737-311300 08:17:36.91 -31:13:00.12 
GL081751-260634 08:17:51.19 -26:06:34.56 
GL081806-200632 08:18:05.80 -20:06:32.04 
GL081854-324543 08:18:54.19 -32:45:43.20 
GL081855-301427 08:18:55.36 -30:14:27.24 
GL081859-231650 08:18:58.68 -23:16:50.52 
GL081904-370400 08:19:03.60 -37:03:59.40 
GL081914-284340 08:19:14.23 -28:43:40.08 
GL081951-224338 08:19:51.12 -22:43:38.28 
GL082052-281358 08:20:51.55 -28:13:58.08 
GL082119-292224 08:21:18.96 -29:22:23.88 
GL082133-270940 08:21:33.14 -27:09:39.96 
GL082144-221105 08:21:43.51 -22:11:04.92 
GL082210-255316 08:22:10.44 -25:53:16.08 
GL082225-270438 08:22:25.44 -27:04:38.28 
GL082317-220507 08:23:16.58 -22:05:06.72 
GL082342-291616 08:23:42.26 -29:16:16.32 
GL082453-231312 08:24:53.01 -23:13:12.36 
GL082619-205052 08:26:19.20 -20:50:52.08 
GL082626-272137 08:26:26.16 -27:21:37.08 
GL082626-272138 08:26:26.42 -27:21:37.44 
GL082722-262347 08:27:21.67 -26:23:47.40