LIGO/Virgo S200224ca: Subaru/Hyper Suprime-Cam follow-up observations
Abstract
We report optical follow-up observations for a high probability area of S200224ca (LIGO Scientific Collaboration and the Virgo Collaboration, GCN #27184) with Hyper Suprime-Cam (HSC) attached to 8.2-m Subaru Telescope. Subaru/HSC has a circular field-of-view of 1.7 deg^2. We performed HSC-r2 and HSC-z band imaging observations on 2020-02-25 UT. We start the first exposure at 10:43 UT, which corresponds to 12.3 hours after the GW detection. The exposure time per frame was 30 sec. We covered 82.5% of probability region with 60 pointings of the HSC. We revisited each pointing twice in each band. The estimated limiting magnitudes in HSC-r2 and HSC-z band are about 24.8 mag and 23.5 mag, respectively. Detailed analysis is ongoing, and further follow-up observations are planned. We thank Subaru's staff for making this observation. The central coordinates of the observed regions are as follows: JGEM30716 11:40:18.75 -14:28:39.0 JGEM29691 11:34:41.25 -12:01:28.9 JGEM28923 11:31:52.50 -10:11:59.7 JGEM30973 11:43:07.50 -15:05:41.2 JGEM29948 11:37:30.00 -12:38:08.3 JGEM28154 11:29:03.75 -08:23:07.9 JGEM29179 11:34:41.25 -10:48:24.9 JGEM30204 11:40:18.75 -13:14:52.9 JGEM28411 11:31:52.50 -08:59:21.5 JGEM30461 11:43:07.50 -13:51:43.0 JGEM29436 11:37:30.00 -11:24:54.6 JGEM27642 11:29:03.75 -07:10:50.7 JGEM26874 11:26:15.00 -05:22:45.8 JGEM28667 11:34:41.25 -09:35:38.6 JGEM30717 11:45:56.25 -14:28:39.0 JGEM29692 11:40:18.75 -12:01:28.9 JGEM27899 11:31:52.50 -07:46:57.8 JGEM30974 11:48:45.00 -15:05:41.2 JGEM28924 11:37:30.00 -10:11:59.7 JGEM29949 11:43:07.50 -12:38:08.3 JGEM27130 11:29:03.75 -05:58:45.0 JGEM26362 11:26:15.00 -04:10:53.5 JGEM28155 11:34:41.25 -08:23:07.9 JGEM30205 11:45:56.25 -13:14:52.9 JGEM29180 11:40:18.75 -10:48:24.9 JGEM27387 11:31:52.50 -06:34:46.5 JGEM26618 11:29:03.75 -04:46:48.7 JGEM28412 11:37:30.00 -08:59:21.5 JGEM30462 11:48:45.00 -13:51:43.0 JGEM29437 11:43:07.50 -11:24:54.6 JGEM25850 11:26:15.00 -02:59:07.8 JGEM27643 11:34:41.25 -07:10:50.7 JGEM30718 11:51:33.75 -14:28:39.0 JGEM28668 11:40:18.75 -09:35:38.6 JGEM29693 11:45:56.25 -12:01:28.9 JGEM26875 11:31:52.50 -05:22:45.8 JGEM26106 11:29:03.75 -03:34:60.0 JGEM27900 11:37:30.00 -07:46:57.8 JGEM29950 11:48:45.00 -12:38:08.3 JGEM28925 11:43:07.50 -10:11:59.7 JGEM27131 11:34:41.25 -05:58:45.0 JGEM26363 11:31:52.50 -04:10:53.5 JGEM28156 11:40:18.75 -08:23:07.9 JGEM30206 11:51:33.75 -13:14:52.9 JGEM29181 11:45:56.25 -10:48:24.9 JGEM27388 11:37:30.00 -06:34:46.5 JGEM28413 11:43:07.50 -08:59:21.5 JGEM29438 11:48:45.00 -11:24:54.6 JGEM26619 11:34:41.25 -04:46:48.7 JGEM25851 11:31:52.50 -02:59:07.8 JGEM27644 11:40:18.75 -07:10:50.7 JGEM29694 11:51:33.75 -12:01:28.9 JGEM28669 11:45:56.25 -09:35:38.6 JGEM26876 11:37:30.00 -05:22:45.8 JGEM26107 11:34:41.25 -03:34:60.0 JGEM27901 11:43:07.50 -07:46:57.8 JGEM28926 11:48:45.00 -10:11:59.7 JGEM27132 11:40:18.75 -05:58:45.0 JGEM28157 11:45:56.25 -08:23:07.9 JGEM27389 11:43:07.50 -06:34:46.5
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2020
- Bibcode:
- 2020GCN.27205....1O