TITLE: GCN CIRCULAR NUMBER: 25347 SUBJECT: LIGO/Virgo S190814bv: no counterpart candidates in Nickel/Direct imaging and non-detections of 2019nmd and 2019nme DATE: 19/08/15 18:26:40 GMT FROM: Charles Kilpatrick at UC Santa Cruz C. D. Kilpatrick, J. S. Brown, D. A. Coulter, G. Dimitriadis, R. J. Foley, S. A. Medallon, C. Rojas-Bravo, M. R. Siebert, K. Siellez, C. S. Smith (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 galaxies with the Direct 2k x 2k detector on the 1m Nickel telescope at Lick Observatory, Mt. Hamilton, California on UT 2019 August 15. Each field was targeted toward a galaxy in the localization region and represents a 6.4 arcmin x 6.4 arcmin pointing centered at the indicated coordinates. All images were 2 minute r' band exposures, and we indicate the approximate 3-sigma limiting magnitude of each image. Comparing to PS1 r band images of the same regions, we did not detect any transients to this depth. Object RA Dec MJD Limiting Magnitude LEDA3080215 00:36:02.33 -20:43:20.3 58710.39502 20.3 LEDA835281 00:35:54.70 -20:53:53.5 58710.39831 20.4 LEDA837629 00:41:16.70 -20:43:28.9 58710.40064 20.3 LEDA829060 00:38:23.64 -21:21:54.4 58710.40337 20.3 LEDA840263 00:40:59.47 -20:31:41.2 58710.40575 20.2 LEDA828390 00:42:36.34 -21:24:58.3 58710.40824 20.3 LEDA824045 00:42:38.30 -21:44:54.2 58710.41062 20.3 LEDA823717 00:41:45.22 -21:46:16.3 58710.41345 20.2 LEDA822778 00:42:26.78 -21:50:27.2 58710.41599 20.3 LEDA172750 00:40:30.07 -22:05:42.0 58710.41897 20.2 LEDA818205 00:43:34.03 -22:09:13.3 58710.42163 20.4 LEDA73383 00:39:20.21 -22:05:06.7 58710.42706 20.3 LEDA816845 00:43:06.41 -22:14:40.6 58710.43175 20.2 LEDA828390 00:42:22.94 -21:28:29.6 58710.43416 20.2 LEDA133689 00:44:16.85 -22:19:40.1 58710.43689 20.2 LEDA817925 00:43:33.31 -22:10:14.2 58710.44282 20.4 00430218-2231305 00:43:02.19 -22:31:30.6 58710.44549 20.3 LEDA818175 00:43:23.02 -22:09:11.5 58710.44801 20.3 00512962-2216458 00:51:29.62 -22:16:45.8 58710.45080 20.3 LEDA817340 00:43:42.60 -22:12:33.5 58710.45368 20.3 LEDA820155 00:46:59.40 -22:00:56.9 58710.45629 20.3 LEDA822779 00:45:59.40 -21:50:06.7 58710.45894 20.4 LEDA820466 00:45:16.94 -21:59:40.6 58710.46148 20.4 LEDA828872 00:42:20.18 -21:22:19.9 58710.46386 20.3 LEDA821974 00:48:08.33 -21:53:30.5 58710.46636 20.3 LEDA825694 00:51:51.00 -21:37:09.1 58710.47198 20.4 LEDA826986 00:49:49.08 -21:30:52.9 58710.47496 20.4 LEDA830067 00:48:30.05 -21:16:42.6 58710.47782 20.3 In addition, we observed the fields around DESGW transients (GCN #25336) 2019nmd and 2019nme. 2019nmd was observed in i' band for 10 minutes and 2019nme was observed in i' for 5 minutes. At the time of observations, we did not detect either transient to the approximate 3-sigma limiting magnitude indicated below. Object RA Dec MJD Limiting Magnitude 2019nmd 00:51:35.95 -22:27:02.5 58710.48096 20.6 2019nme 00:50:39.65 -22:12:17.6 58710.49475 20.3 For 2019nmd, our limits are comparable to the discovery magnitude and in the same band as the original report of GCN #25336. However, for 2019nme our limits are significantly deeper than the discovery report, which suggests that this transient is either extremely rapidly declining in i' band (1 mag in the 5.2 hours between DESGW and Nickel observations), an uncatalogued minor planet, or non-astrophysical in nature. Please direct all communication related to this circular to Charles Kilpatrick (cdkilpat@ucsc.edu)