[vsnet-grb-info 40789] LIGO/Virgo/KAGRA S251112cm: J-GEM follow-up observations

TITLE: GCN CIRCULAR NUMBER: 42725 SUBJECT: LIGO/Virgo/KAGRA S251112cm: J-GEM follow-up observations DATE: 25/11/17 18:02:48 GMT FROM: Kenta Taguchi <kentagch@kusastro.kyoto-u.ac.jp> Kenta Taguchi, Miho Kawabata (Kyoto U.); Ryosuke Itoh (Ibara City); Hiroshi Akitaya, Tomoki Morokuma (ARC/Chiba Tech); Jun Takahashi, Satoshi Honda, Miyako Tozuka, Shigeru Takahashi​​ (Univ. of Hyogo/NHAO); Koji Kawabata, Tatsuya Nakaoka (Hiroshima U.); Haruna Hagio, Ryotaro Kato, Atsuya Ochi, Mahito Sasada, Ichiro Takahashi (Science Tokyo); Nozomu Tominaga, Yousuke Utsumi, Michitoshi Yoshida, Haibin Zhang, Masafumi Niwano, Mitsuru Kokubo, Yuhei Iwata (NAOJ); Masaomi Tanaka (Tohoku University); Yuu Niino, Taiga Sasaoka (U. of Tokyo); Yumiko Oasa, Takahiro Kanai (Saitama Univ.); Yuichiro Sekiguchi (Toho University) on behalf of the J-GEM collaboration We report imaging follow-up observations for the gravitational-wave event S251112cm (GCN 42650). Our observations started at 2025-11-12 19:09:29 UT (MJD=60991.80), approximately 3.8 hours after the event, and ended at 2025-11-17 10:18:47 UT (MJD=60996.43). We conducted galaxy-targeted observations of 135 galaxies (see the table below), selected from the GLADE catalog (v2.4; Dalya et al. 2018) within the probability skymap of S251112cm, using the telescopes and instruments listed below. After screening out known minor planets, we did not find any apparent transient candidates in these galaxies down to the 5-sigma limiting magnitudes in the AB magnitude system summarized below. galid ra dec dist g r R i I z J H Ks NoFilt obsid --------------- -------- -------- ------ ---- ---- ---- ---- ---- ---- ---- ---- ---- ------ ------- GL000835-335128 2.1441 -33.8578 97.4 -- -- 17.2 -- -- -- -- -- -- -- 1 GL094621+030417 146.5879 3.0713 86.9 19.6 18.6 -- 18.8 -- -- -- -- -- 18.3 2,3 GL095807+102135 149.5288 10.3598 77.8 20.4 19.9 19.8 19.8 18.0 -- -- 15.8 -- -- 4,5,2 GL102235+195314 155.6440 19.8871 82.7 19.9 19.6 18.7 19.6 18.0 -- -- -- -- 19.0 5,2,3 GL094620+030244 146.5848 3.0455 87.3 19.6 18.6 -- 18.8 -- -- -- -- -- 18.3 2,3 GL094604+042412 146.5148 4.4033 71.9 18.0 17.1 -- 17.2 -- -- -- -- -- 18.5 2,3 GL093427-023015 143.6119 -2.5041 78.1 19.6 18.6 20.1 18.9 -- -- -- 16.8 -- 14.9 2,3,4 GL100140+104523 150.4186 10.7564 78.3 19.9 19.5 18.6 19.5 17.9 -- -- -- -- 18.6 5,2,3 GL103939+251921 159.9126 25.3226 75.2 19.8 -- 19.9 19.1 -- -- -- 15.8 -- 18.9 2,3,4 GL092022-075250 140.0914 -7.8807 49.6 19.2 18.4 19.6 18.6 -- -- -- 17.2 -- 18.5 2,4,3 GL224424-000943 341.1015 -0.1620 70.1 -- -- 18.2 -- -- -- -- 18.8 -- 19.4 1,3,6 GL094909+022851 147.2866 2.4808 88.5 20.4 19.6 15.3 19.3 15.1 -- -- -- -- 14.5 5,2,3 GL094559+030843 146.4950 3.1453 85.8 19.7 19.0 -- 18.8 -- -- -- -- -- 18.2 2,3 GL102905+221246 157.2692 22.2128 92.9 20.0 19.4 -- 19.2 -- -- -- -- -- 19.1 2,3 GL230311-085921 345.7959 -8.9890 104.2 20.4 19.6 -- 19.8 -- -- -- -- 17.6 19.2 2,3,6 GL094036+033437 145.1516 3.5769 73.2 18.3 17.3 -- 17.5 -- 16.5 -- -- -- -- 7,2 GL234745-280828 356.9380 -28.1410 124.7 18.3 17.6 -- 23.8 -- -- -- -- -- -- 2 GL234045-244137 355.1890 -24.6937 98.5 -- 18.5 -- 19.2 -- -- -- -- -- 18.9 3,2 GL230344-071330 345.9325 -7.2250 74.5 20.2 19.7 18.6 19.9 18.2 18.2 -- -- -- 19.0 2,7,3,5 GL103958+240528 159.9915 24.0912 91.6 19.7 18.8 -- 18.8 -- -- -- -- -- -- 2 GL093941-001406 144.9204 -0.2351 72.2 17.1 16.5 -- 16.4 -- -- -- -- -- 17.8 2,3 GL103130+245210 157.8750 24.8693 90.7 19.6 18.6 -- 18.4 -- -- -- -- -- 18.7 2,3 GL110800+365220 166.9981 36.8722 116.9 20.2 19.4 -- 19.4 -- -- -- -- -- 19.0 2,3 GL234729-280634 356.8690 -28.1093 120.3 18.3 17.6 -- 23.8 -- -- -- -- -- -- 2 GL235137-282154 357.9030 -28.3651 121.0 18.4 18.0 -- -- -- -- -- -- -- 18.6 3,2 GL101229+122237 153.1220 12.3771 79.2 19.7 19.3 -- 19.2 -- -- -- -- -- 18.7 2,3 GL093411+001431 143.5443 0.2420 70.9 20.2 19.7 18.6 19.7 17.9 -- -- 17.8 -- 17.7 5,2,3,4 GL225651-085803 344.2120 -8.9674 72.7 -- -- -- -- -- -- 17.9 17.9 -- 19.0 3,6 GL225542-052943 343.9238 -5.4953 43.8 19.2 -- -- 18.2 -- -- -- -- -- 19.4 2,3 GL104801+281447 162.0045 28.2464 92.0 21.6 21.2 -- 21.2 -- -- -- -- -- 21.1 2,3 GL092514-064300 141.3074 -6.7166 88.7 20.0 19.4 -- 19.4 -- -- -- -- -- 18.9 2,3 GL104437+261054 161.1539 26.1816 90.8 -- -- -- -- -- -- -- -- -- 18.9 3 GL232431-190333 351.1310 -19.0591 110.5 19.9 18.8 -- 18.9 -- -- -- 18.1 18.1 19.0 2,3,6 GL000254-341408 0.7269 -34.2357 98.9 -- -- 16.7 -- 17.2 -- -- -- -- -- 5 GL091049-085331 137.7050 -8.8919 27.7 20.0 19.3 -- 19.4 -- -- -- -- -- 18.7 2,3 GL223407+053413 338.5282 5.5703 65.5 19.9 18.9 -- 19.6 -- -- 17.4 17.9 17.5 -- 2,6 GL235624-312111 359.0995 -31.3532 125.1 -- -- -- -- -- -- -- -- -- 17.9 3 GL104703+263235 161.7609 26.5430 91.8 19.7 -- -- 19.0 -- -- -- -- -- 18.7 2,3 GL225138-053326 342.9087 -5.5573 53.2 19.9 19.4 -- 19.8 -- -- -- -- -- 19.2 2,3 GL225641-072245 344.1724 -7.3790 64.2 19.2 18.1 -- 18.5 -- -- -- -- -- -- 2 GL095230+020916 148.1235 2.1544 72.2 19.6 19.0 -- 18.7 -- -- -- -- -- 18.6 2,3 GL095730+080729 149.3742 8.1246 94.6 -- -- -- -- -- -- -- -- -- 19.0 3 GL103617+265744 159.0691 26.9623 92.1 19.5 19.1 -- 19.0 -- -- -- -- -- 19.1 2,3 GL234743-280838 356.9300 -28.1439 117.6 18.3 17.6 -- 23.8 -- -- -- -- -- -- 2 GL093635+010700 144.1473 1.1165 71.3 19.5 18.6 20.6 18.8 -- -- -- 16.2 -- -- 2,4 GL092056-094336 140.2319 -9.7268 56.4 -- -- -- -- -- -- -- -- -- 18.7 3 GL094617+054231 146.5710 5.7087 44.7 19.4 18.8 19.9 18.7 -- 17.1 -- 15.3 -- -- 7,2,4 GL094541+045631 146.4228 4.9419 54.0 19.9 19.2 -- 19.3 -- 17.9 -- -- -- -- 7,2 GL104245+265038 160.6860 26.8438 87.9 20.1 19.6 -- 19.4 -- -- -- -- -- 18.8 2,3 GL110427+381232 166.1138 38.2089 135.9 -- 18.2 -- 17.9 -- 18.1 -- -- -- 18.5 7,3 GL094901+041811 147.2530 4.3030 88.8 -- -- -- -- -- -- -- -- -- 18.6 3 GL094410+022437 146.0433 2.4103 86.7 20.1 19.3 -- -- -- -- -- -- -- -- 2 GL232149-164309 350.4551 -16.7192 85.6 18.6 17.6 -- 18.0 -- -- -- -- -- 19.0 2,3 GL230658-091710 346.7422 -9.2861 103.7 19.8 18.9 -- 19.1 -- -- -- 17.7 -- 18.8 2,3,6 GL101301+170203 153.2554 17.0342 95.9 19.3 19.0 20.6 18.9 17.2 -- -- 16.0 -- 18.6 5,2,4,3 GL093434+000522 143.6430 0.0894 68.4 19.9 19.5 18.6 19.7 17.9 -- -- -- -- 17.6 5,2,3 GL104827+263502 162.1140 26.5838 88.5 27.3 27.3 -- 27.3 -- -- -- -- -- 27.0 2,3 GL110558+362425 166.4920 36.4070 108.1 20.2 19.8 -- 19.5 -- -- -- -- -- 18.6 2,3 GL225544-062712 343.9352 -6.4533 104.7 19.9 19.2 -- 19.5 -- -- -- -- -- -- 2 GL100135+124554 150.3962 12.7649 91.2 19.8 19.3 -- 19.2 -- -- -- -- -- 18.8 2,3 GL235754-314854 359.4764 -31.8151 126.6 -- -- -- -- -- -- -- -- -- 18.0 3 GL100430+144608 151.1230 14.7690 101.5 19.3 18.6 20.0 18.4 -- -- -- 18.0 -- 14.3 4,2,3 GL100545+101636 151.4356 10.2767 104.9 -- -- -- -- -- -- -- -- -- 18.7 3 GL095757+102556 149.4862 10.4323 76.5 20.3 19.8 19.8 19.7 18.0 -- -- 15.8 -- -- 4,5,2 GL095905+102140 149.7714 10.3611 77.6 18.0 16.7 18.6 -- 18.0 -- -- -- -- -- 5,2 GL110759+352748 166.9957 35.4633 125.8 19.7 19.0 -- 19.0 -- -- -- -- -- 18.4 2,3 GL104739+261746 161.9130 26.2961 91.8 19.1 18.0 -- 18.3 -- -- -- -- -- 18.4 2,3 GL095351+085241 148.4630 8.8781 92.4 19.6 18.7 18.4 18.5 17.6 -- -- -- -- 18.8 2,3,5 GL232338-190035 350.9101 -19.0097 112.2 19.7 18.5 -- 19.1 -- -- -- -- -- 19.2 2,3 GL233923-222956 354.8438 -22.4989 112.9 19.2 18.9 -- 19.2 -- -- -- -- -- -- 2 GL120532+513017 181.3840 51.5047 124.3 20.4 19.7 -- 19.4 -- -- -- -- -- 18.8 2,3 GL110916+360116 167.3172 36.0212 92.7 19.9 19.1 -- 19.3 -- -- -- -- -- 18.1 2,3 GL230009-083953 345.0359 -8.6647 107.0 20.2 19.6 -- 19.6 -- -- -- -- -- -- 2 GL110505+352157 166.2693 35.3657 108.9 20.1 19.4 -- 19.1 -- -- -- -- -- 18.1 2,3 GL104552+255705 161.4677 25.9515 90.5 19.6 18.9 -- 18.5 -- -- -- -- -- 18.2 2,3 GL110955+365648 167.4810 36.9465 132.5 20.6 20.0 -- 19.7 -- -- -- -- -- 19.1 2,3 GL094900+022748 147.2477 2.4633 82.6 -- -- -- -- -- -- -- -- -- 14.5 3 GL102626+173038 156.6065 17.5105 80.7 -- -- -- -- -- -- -- -- -- 18.8 3 GL104607+255417 161.5305 25.9049 92.1 19.6 18.9 -- 18.5 -- -- -- -- -- 18.2 2,3 GL234615-280557 356.5627 -28.0990 121.6 -- 18.5 -- 18.8 -- -- -- -- -- -- 2 GL103139+255902 157.9119 25.9840 91.5 18.9 18.6 -- 18.2 -- 18.0 -- -- -- 19.1 7,2,3 GL102241+205133 155.6709 20.8590 107.4 -- -- -- -- -- -- -- -- -- 19.2 3 GL113253+433054 173.2190 43.5150 106.2 23.4 23.1 -- 19.6 -- -- -- -- -- 21.3 2,3 GL095106+090031 147.7751 9.0085 75.2 20.4 19.8 20.0 19.6 18.1 -- -- 17.7 -- 18.9 5,4,2,3 GL093744+024542 144.4330 2.7616 97.9 20.4 19.5 20.7 19.7 -- -- -- -- -- -- 2,4 GL091711-044508 139.2939 -4.7521 51.0 19.6 19.1 19.6 18.8 -- -- -- 17.4 -- 18.0 2,3,4 GL104642+255554 161.6770 25.9317 89.6 20.0 19.4 -- 19.0 -- -- -- -- -- 18.6 2,3 GL102917+260557 157.3200 26.0991 73.6 17.7 -- -- -- -- -- -- -- -- -- 2 GL110958+370810 167.4932 37.1360 113.7 20.2 -- -- 19.4 -- -- -- -- -- -- 2 GL111208+352707 168.0335 35.4520 108.8 20.2 18.8 -- 19.5 -- -- -- -- -- 17.9 2,3 GL094955+090949 147.4781 9.1637 75.6 18.2 17.3 19.7 17.1 15.5 -- -- 17.8 -- -- 5,2,4 GL100836+181353 152.1515 18.2313 73.9 -- -- 20.0 -- -- -- -- 18.2 -- -- 4 GL093411+001430 143.5440 0.2417 66.7 20.2 19.7 17.4 19.7 17.0 -- -- 17.2 -- 13.9 5,2,3,4 GL130847+621618 197.1938 62.2716 118.2 19.8 19.1 -- 18.8 -- -- -- -- -- 18.0 2,3 GL121329+504429 183.3722 50.7415 134.9 19.7 19.2 -- 19.0 -- -- -- -- -- -- 2 GL110542+350704 166.4263 35.1178 125.8 -- -- -- -- -- -- -- -- -- 17.9 3 GL233707-202747 354.2789 -20.4631 115.3 19.0 17.8 -- 18.2 -- -- -- -- -- -- 2 GL225223+010533 343.0941 1.0926 71.3 20.2 18.9 -- 19.2 -- -- -- -- -- -- 2 GL123208+562816 188.0340 56.4711 66.5 20.4 19.9 -- 22.2 -- -- -- -- -- 19.8 2,3 GL123221+563923 188.0891 56.6564 66.6 -- -- -- -- -- -- -- -- -- 17.9 3 GL120251+483811 180.7111 48.6363 49.4 20.1 19.7 -- 19.8 -- -- -- -- -- 18.2 2,3 GL110841+360940 167.1716 36.1610 121.1 -- -- -- -- -- -- -- -- -- 12.3 3 GL092046-080322 140.1927 -8.0562 85.6 -- -- -- -- -- -- -- -- -- 18.5 3 GL231645-185257 349.1889 -18.8825 109.5 19.2 -- -- 18.4 -- -- -- -- -- -- 2 GL130737+621258 196.9038 62.2160 121.1 20.2 19.7 -- 19.6 -- -- -- -- -- 17.9 2,3 GL104827+263501 162.1137 26.5837 91.4 27.3 27.3 -- 27.3 -- -- -- -- -- -- 2 GL120945+563125 182.4386 56.5235 115.1 -- -- -- -- -- -- -- -- -- 17.8 3 GL231022-084119 347.5910 -8.6886 103.0 18.3 17.2 -- 17.4 -- -- -- -- -- -- 2 GL091906-064215 139.7744 -6.7042 87.6 -- -- -- -- -- -- -- -- -- 17.6 3 GL113906+431450 174.7746 43.2473 106.3 20.4 19.9 -- 19.7 -- -- -- -- -- -- 2 GL123600+541315 189.0006 54.2208 77.6 20.2 19.4 -- 19.6 -- -- -- -- -- -- 2 GL111118+352308 167.8252 35.3855 108.8 20.1 19.3 -- 19.9 -- -- -- -- -- 18.1 2,3 GL225716-105700 344.3147 -10.9499 105.2 19.7 18.4 -- 18.9 -- -- -- -- -- -- 2 GL094953+090545 147.4705 9.0959 81.5 15.9 -- 19.7 -- 15.5 -- -- -- -- -- 5,4 GL114916+460713 177.3185 46.1203 94.5 -- -- -- -- -- -- -- -- -- 18.3 3 GL230009-124828 345.0368 -12.8079 50.6 20.1 19.1 -- 19.3 -- -- -- -- -- -- 2 GL114803+461028 177.0139 46.1746 108.5 -- -- -- -- -- -- -- -- -- 18.3 3 GL111451+353008 168.7137 35.5022 93.5 19.9 19.1 -- 19.2 -- -- -- -- -- 17.9 2,3 GL093745+024450 144.4378 2.7473 101.6 20.4 19.5 -- 19.7 -- -- -- -- -- -- 2 GL104532+240900 161.3845 24.1501 88.9 20.2 19.5 -- 19.0 -- -- -- -- -- -- 2 GL120446+491112 181.1925 49.1865 104.5 -- -- -- -- -- -- -- -- -- 17.9 3 GL111522+353007 168.8413 35.5020 92.4 19.9 19.1 -- 19.2 -- -- -- -- -- 17.9 2,3 GL111507+363224 168.7802 36.5401 107.1 20.2 19.3 -- 19.2 -- -- -- -- -- 18.2 2,3 GL103546+210253 158.9420 21.0481 102.5 17.5 -- 18.8 -- 18.0 -- -- -- -- 18.8 5,3 GL111535+363033 168.8966 36.5092 108.8 20.2 19.3 -- 19.2 -- -- -- -- -- 17.9 2,3 GL232235-130539 350.6470 -13.0941 102.5 19.9 18.9 -- 19.0 -- -- -- -- -- -- 2 GL112646+391558 171.6918 39.2662 90.6 -- -- -- -- -- -- -- -- -- 17.8 3 GL111734+360351 169.3902 36.0641 112.8 19.9 19.3 17.8 19.2 16.9 -- -- -- -- 17.8 2,3,5 GL094937+090019 147.4041 9.0053 75.4 18.9 18.1 15.9 17.8 15.5 -- -- 18.1 -- -- 5,2,4 GL111703+360828 169.2646 36.1411 110.5 20.3 19.6 17.8 19.6 16.9 -- -- -- -- -- 2,5 GL112719+383952 171.8290 38.6645 93.8 20.3 -- -- 19.2 -- -- -- -- -- 17.7 2,3 GL122635+525934 186.6451 52.9929 94.6 -- -- -- -- -- -- -- -- -- 18.2 3 GL112001+360603 170.0025 36.1007 110.3 20.5 19.6 -- 19.5 -- -- -- -- -- -- 2 GL113009+383713 172.5390 38.6204 93.3 -- -- -- -- -- -- -- -- -- 17.8 3 GL232407-115139 351.0290 -11.8607 108.1 19.7 18.6 -- 19.1 -- -- -- -- -- -- 2 References for obsid: 1: BAO101cm: 101 cm telescope at Bisei Astronomical Observatory and CCD optical camera (B, V, Rc, Ic) 2: Seimei-TriCCS: 380 cm Seimei telescope (g, r, i) 3: Kiso Schmidt: 105 cm Schmidt telescope at Kiso Observatory and Tomo-e Gozen 20 deg2 fov camera (no filter) 4: 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) 5: MITSuME-Akeno: 50 cm MITSuME telescope at Akeno Observatory and a 3 color imager (g, Rc, Ic); The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, 73, 1, 4-24; https://github.com/MNiwano/Eclaire). 6: Nayuta-NIC: 200 cm Nayuta telescope at Nishi-Harima Astronomical Observatory and Nishiharima Infrared Camera, NIC (J, H, Ks) 7: SaCRA-MuSaSHI: 55 cm SaCRA telescope at Saitama University and MuSaSHI (r, i, z) (Oasa et al., 2020, proc. SPIE, 11447, 114475Z) View this GCN Circular online at https://gcn.nasa.gov/circulars/42725. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...