TITLE:   GCN CIRCULAR
NUMBER:  24566
SUBJECT: LIGO/Virgo S190513bm: Swope follow-up observations
DATE:    19/05/16 23:00:08 GMT
FROM:    Charles Kilpatrick at UC Santa Cruz  <cdkilpat@ucsc.edu>

C. D. Kilpatrick, D. A. Coulter, J. S. Brown, G. Dimitriadis, R. J. Foley, T. Hung, D. O. Jones, A. Murguia-Berthier, J. X. Prochaska, E. Ramirez-Ruiz, C. Rojas-Bravo, M. R. Siebert, K. Siellez (UCSC), A. L. Piro (Carnegie), A. Rest (STScI), Abdo Campillay (Universidad de La Serena), M. Drout (University of Toronto)

report on behalf of the 1M2H collaboration:

in the process of following up the localization region of LIGO/Virgo S190513bm on 2019 May 14 UT, we observed the following fields with the 1.0-m Swope telescope at Las Campanas Observatory.  We covered approximately 15% of the probability region from the LALinference map provided by the LVC (GCN 24522). 

The Swope Direct 4kx4k imager covers 29.8 arcmin x 29.7 arcmin.  All images were 5-minute r-band exposures.  We performed difference imaging using the photpipe image reduction and subtraction pipeline (Rest et al. 2005, ApJ, 634, 1103) with PS1 (Flewelling et al. 2016, arXiv:161205243)  and SkyMapper (Wolf et al. 2018, PASA, 35, 10) r-band templates for reference.  For each image, the approximate pointing center and 3-sigma limiting magnitude are indicated.  We did not detect any new transients in these images.

RA (J2000)  | DEC (J2000) | MJD         | Limiting Magnitude
19:06:59.76 | -29:19:22.0 | 58617.33552 |    21.7
19:07:00.91 | -30:18:56.1 | 58617.33123 |    21.8
19:06:59.64 | -29:49:14.8 | 58617.34000 |    21.7
19:09:16.77 | -29:19:18.8 | 58617.34481 |    21.8
19:04:40.94 | -30:18:57.9 | 58617.32678 |    21.7
19:09:17.25 | -30:18:50.0 | 58617.34907 |    21.8
19:07:00.24 | -28:49:34.3 | 58617.32241 |    21.7
19:04:43.36 | -29:19:17.0 | 58617.31808 |    21.7
19:09:16.56 | -29:49:01.9 | 58617.35336 |    21.7
19:04:41.85 | -29:49:00.4 | 58617.31377 |    21.7
19:09:15.16 | -28:49:35.0 | 58617.35756 |    21.7
19:07:00.19 | -30:48:42.4 | 58617.30949 |    21.7
19:04:43.80 | -28:49:31.8 | 58617.36199 |    21.8
19:04:40.39 | -30:48:41.7 | 58617.30524 |    21.8
19:11:33.04 | -29:19:25.3 | 58617.36634 |    21.8
19:09:17.49 | -30:48:56.1 | 58617.37087 |    21.8
19:06:59.54 | -31:18:26.2 | 58617.30101 |    21.8
19:06:59.85 | -28:19:35.0 | 58617.29666 |    21.7
19:02:24.12 | -30:18:56.1 | 58617.29206 |    21.6
19:11:35.64 | -30:19:00.8 | 58617.37517 |    21.8
19:02:26.37 | -29:19:22.4 | 58617.28774 |    21.7
19:04:39.74 | -31:18:44.6 | 58617.38035 |    21.8
19:11:31.53 | -28:49:29.2 | 58617.38497 |    21.7
19:11:33.55 | -29:49:19.2 | 58617.38929 |    21.7
19:09:15.14 | -28:19:33.2 | 58617.28332 |    21.8
19:02:24.88 | -29:49:10.2 | 58617.27860 |    21.6
19:09:17.97 | -31:18:39.6 | 58617.39361 |    21.7
19:04:44.88 | -28:19:39.7 | 58617.27406 |    21.6
19:06:58.53 | -27:49:53.7 | 58617.39814 |    21.7
19:02:28.03 | -28:49:19.2 | 58617.26932 |    21.5
19:09:14.06 | -27:49:58.4 | 58617.40274 |    21.7
19:02:21.88 | -30:48:47.8 | 58617.26479 |    21.5
19:11:36.72 | -30:49:03.7 | 58617.40721 |    21.7
19:04:45.50 | -27:49:44.0 | 58617.26001 |    21.4
19:02:22.99 | -31:18:27.3 | 58617.25547 |    21.4
19:11:28.87 | -28:19:32.5 | 58617.24663 |    21.3
19:13:49.20 | -29:19:09.8 | 58617.24203 |    21.2
19:07:00.50 | -31:48:17.6 | 58617.23755 |    21.3
19:04:40.80 | -31:48:19.4 | 58617.23247 |    21.3
19:13:53.28 | -30:18:57.9 | 58617.22780 |    21.2
19:07:00.69 | -27:19:58.8 | 58617.22306 |    21.2
19:00:07.24 | -30:18:52.2 | 58617.21831 |    21.2
19:13:50.85 | -29:49:01.2 | 58617.21369 |    21.2
19:09:12.40 | -27:20:08.1 | 58617.20906 |    21.0
19:11:29.13 | -27:49:48.7 | 58617.20457 |    21.0
19:00:11.97 | -29:19:12.7 | 58617.19986 |    21.0
19:09:20.23 | -31:48:22.6 | 58617.19528 |    21.0
19:02:30.19 | -28:19:35.7 | 58617.19060 |    20.9
19:00:09.14 | -29:49:06.6 | 58617.18583 |    20.8
19:13:47.32 | -28:49:36.1 | 58617.18101 |    20.9
19:04:46.27 | -27:20:04.2 | 58617.17635 |    20.8
19:02:20.78 | -31:48:27.7 | 58617.17166 |    20.9
19:13:45.43 | -28:19:44.7 | 58617.16690 |    20.7
19:00:05.11 | -30:48:48.9 | 58617.15785 |    20.6
19:00:13.80 | -28:49:36.1 | 58617.15314 |    20.7
18:57:47.52 | -30:48:56.1 | 58617.14788 |    20.6
17:05:49.48 | +04:57:24.4 | 58617.14270 |    21.0
17:03:44.08 | +05:27:24.4 | 58617.13778 |    20.9
17:03:49.44 | +04:57:33.1 | 58617.13264 |    20.9
17:03:53.64 | +04:27:38.8 | 58617.12769 |    20.9
17:10:04.29 | +02:58:11.2 | 58617.12213 |    20.9
17:08:08.88 | +02:28:18.8 | 58617.11722 |    20.8
17:02:12.67 | +01:58:19.2 | 58617.11199 |    20.9

Please direct all communication related to this circular to Charlie Kilpatrick (cdkilpat@ucsc.edu).