{
  "bibcode": "2017GCN.21586....1Y",
  "body": "Yoshida, M., Tanaka, M., Terai, T., Nakata, F., Tajitsu, A.,\nFujiyoshi, T. (NAOJ), Utsumi, Y., Kawabata K. S. (Hiroshima U.),\nTominaga, N. (Konan U.), Motohara, K., Ohsawa, R., Morokuma, T.\n(Univ. of Tokyo), Kawai, N. (Tokyo Tech.), and Asakura, Y. (Nagoya\nUniv.) on behalf of the J-GEM collaboration\n\nWe performed follow-up observations for the gravitational wave\nevent G298048 with Hyper Suprime-Cam attached to the Subaru\ntelescope from 5:20 to 6:00 on August 19 2017 UT. We surveyed the\nsame sky area as our previous observation (GCN 21549) with HSC-z\nband filter. SSS17a, which is the most promising candidate of the\noptical counterpart of G298048 (GCN 21529), was still bright. The\nrough estimation of the z-band magnitude of the object was ~17.7\n(AB). Further analysis is ongoing.\n\nThe sky fields observed by this survey are listed below:\n\nID Time��������������� RA��������� DEC��������� Exp� Filter\n-----------------------------------------------------------\n28 2017-08-19T05:21:42 13h10m14.4s -23d19m20.0s� 2.0s HSC-z\n04 2017-08-19T05:22:21 13h07m25.6s -26d36m51.9s 10.0s HSC-z\n05 2017-08-19T05:23:02 13h10m14.3s -27d17m02.1s 10.0s HSC-z\n06 2017-08-19T05:23:46 13h13m03.0s -27d57m27.1s 10.0s HSC-z\n07 2017-08-19T05:24:28 13h15m51.8s -28d38m07.2s 10.0s HSC-z\n08 2017-08-19T05:25:11 13h18m40.5s -29d19m03.0s 10.0s HSC-z\n09 2017-08-19T05:25:57 13h21m29.2s -30d00m15.5s 10.0s HSC-z\n28 2017-08-19T05:26:44 13h10m14.4s -23d19m20.0s 30.0s HSC-z\n10 2017-08-19T05:27:44 13h04m36.9s -24d37m43.0s 30.0s HSC-z\n11 2017-08-19T05:28:45 13h07m25.6s -25d17m13.0s 30.0s HSC-z\n12 2017-08-19T05:29:47 13h10m14.4s -25d56m55.7s 30.0s HSC-z\n13 2017-08-19T05:30:48 13h13m03.1s -26d36m52.0s 30.0s HSC-z\n28 2017-08-19T05:31:49 13h10m14.4s -23d19m20.0s 30.0s HSC-z\n14 2017-08-19T05:32:51 13h01m48.2s -22d40m26.0s 30.0s HSC-z\n15 2017-08-19T05:33:54 13h15m51.8s -27d17m02.0s 30.0s HSC-z\n16 2017-08-19T05:34:55 13h18m40.5s -27d57m27.0s 30.0s HSC-z\n17 2017-08-19T05:35:59 13h04m36.9s -23d19m20.1s 30.0s HSC-z\n18 2017-08-19T05:37:00 13h07m25.7s -23d58m25.6s 30.0s HSC-z\n19 2017-08-19T05:38:02 12h58m59.5s -20d44m48.0s 30.0s HSC-z\n20 2017-08-19T05:39:03 13h10m14.4s -24d37m43.1s 30.0s HSC-z\n22 2017-08-19T05:40:05 13h13m03.1s -25d17m12.9s 30.0s HSC-z\n23 2017-08-19T05:41:06 13h15m51.9s -25d56m55.6s 30.0s HSC-z\n24 2017-08-19T05:42:15 12h56m10.8s -18d50m37.3s 30.0s HSC-z\n25 2017-08-19T05:43:15 13h04m37.0s -22d01m43.1s 30.0s HSC-z\n26 2017-08-19T05:44:15 13h07m25.7s -22d40m26.2s 30.0s HSC-z\n29 2017-08-19T05:45:16 13h01m48.3s -20d06m35.2s 30.0s HSC-z\n28 2017-08-19T05:46:17 13h10m14.4s -23d19m20.1s 30.0s HSC-z\n28 2017-08-19T05:47:17 13h10m14.4s -23d19m20.1s 120.0s HSC-z\n28 2017-08-19T05:49:48 13h10m14.4s -23d19m20.0s 120.0s HSC-z\n28 2017-08-19T05:52:20 13h10m17.5s -23d18m06.5s 60.0s HSC-z\n-----------------------------------------------------------",
  "circularId": 21586,
  "createdOn": 1503125553000,
  "email": "tominaga@konan-u.ac.jp",
  "subject": "LIGO/Virgo G298048: HSC observations of the OT candidate of G298048",
  "submitter": "Nozomu Tominaga at Konan U  <tominaga@konan-u.ac.jp>",
  "eventId": "LIGO/Virgo G298048"
}