TITLE: GCN CIRCULAR NUMBER: 25351 SUBJECT: LIGO/Virgo S190814bv: no counterpart candidates in Thacher imaging DATE: 19/08/15 21:12:41 GMT FROM: Charles Kilpatrick at UC Santa Cruz J. Swift, Y. Yin (Thacher School Observatory), C. D. Kilpatrick, J. S. Brown, D. A. Coulter, G. Dimitriadis, R. J. Foley, C. Rojas-Bravo, M. R. Siebert, K. Siellez (UCSC) report on behalf of the One-Meter Two Hemisphere (1M2H) collaboration: in the process of following up galaxies in the localization region of LIGO/Virgo collaboration event S190814bv (GCN #25324) provided in the updated map of GCN #25333, we observed the following fields with the 0.7-m Thacher telescope at the Thacher School Observatory on UT 2019 August 15. Each field represents a 3 minute r-band image. The approximate center of each image is noted in the table below, and the field of view is a 21 arcmin x 21 arcmin rectangle. We also note the approximate 3-sigma limiting magnitude of each pointing. Comparing our images to PS1 r-band images of the same fields, we did not detect any transient sources. Field RA Dec MJD Limiting Magnitude t100590 00:46:22.72 -24:24:13.7 58710.46465 19.3 t111134 00:36:17.38 -20:34:58.4 58710.45696 19.3 t106304 00:39:41.83 -22:18:48.6 58710.45951 19.4 t108232 00:42:30.94 -21:37:16.0 58710.46209 19.3 t102488 00:49:11.40 -23:41:53.2 58710.46721 19.2 t104397 00:53:26.90 -23:00:19.8 58710.46976 19.2 t099651 00:54:10.94 -24:44:11.0 58710.47230 19.1 t102491 00:53:44.16 -23:41:53.5 58710.50424 19.3 t105354 00:53:20.71 -22:39:33.8 58710.50678 19.1 t103442 00:52:06.82 -23:21:06.1 58710.50934 19.1 Please direct all communication related to this circular to Charlie Kilpatrick (cdkilpat@ucsc.edu).