TITLE: GCN CIRCULAR NUMBER: 36316 SUBJECT: LIGO/Virgo/KAGRA S240422ed: Continued Magellan Observations DATE: 24/04/26 14:38:58 GMT FROM: Ryan Foley at UC Santa Cruz foley@ucsc.edu
A. L. Piro, J. D. Simon (Carnegie), A. Polin (Carnegie/Purdue), D. A. Coulter (STScI), M. R. Drout (Toronto), R. J. Foley, and C. Rojas-Bravo (UC Santa Cruz)
report on behalf of the Carnegie Gravitational wave ElectroMagnetic follow-up (CGEM) and the One-Meter Two-Hemisphere (1M2H) collaborations:
We have continued our galaxy-targeted search (GCN 36244, GCN 36267) for optical counterparts to the candidate gravitational wave event S240422ed (GCN 36236) using Teglon (Coulter 2021) with the LDSS-3 imager on the 6.5m Magellan Clay telescope. We obtained a series of 120-second i-band images targeting galaxies coincident with the 3D localization of S240422ed. We performed a preliminary search of the data by comparing to archival Pan-STARRS (Chambers et al., 2016) and DECaPS2 (Saydjari et al. 2022) images, and found no obvious transient sources near the targeted galaxies. However, we note that several images were deeper than the comparison images, precluding the exclusion of some faint sources detected in only the new images as transient sources. The images have typical depths of i~21.5-22.5 mag, varying with seeing and airmass.
We thank Marcelo Mora, Povilas Palunas, and the rest of the LCO staff for making these observations possible.
Below we provide a list of targeted galaxies (including those previously listed in GCN 36244 for completeness) and observation details.
Galaxy RA Dec Filter Start (UT) Date (UT) 86096 07:52:28.3 -25:55:06.4 i_Sloan 01:00:32 2024-04-25 07534680-2656186 07:53:46.8 -26:56:18.6 i_Sloan 23:19:39 2024-04-23 07543602-2134176 07:54:36.0 -21:34:17.1 i_Sloan 23:24:13 2024-04-23 07550406-2137197 07:55:04.0 -21:37:19.9 i_Sloan 03:13:16 2024-04-25 07552968-2203256 07:55:29.7 -22:03:25.4 i_Sloan 23:27:14 2024-04-23 07560574-2254025 07:56:05.8 -22:54:02.0 i_Sloan 23:33:13 2024-04-23 79057 07:56:17.0 -22:07:36.9 i_Sloan 03:26:51 2024-04-25 07595685-2210083 07:57:41.8 -21:53:12.7 r_Sloan 00:06:20 2024-04-24 ESO561-004 07:58:18.6 -20:40:09.3 i_Sloan 02:33:12 2024-04-25 07582363-2159463 07:58:23.6 -21:59:46.0 i_Sloan 23:38:36 2024-04-23 79228 07:58:40.1 -22:05:11.4 i_Sloan 01:44:41 2024-04-25 07585448-2217184 07:58:50.3 -22:17:15.1 i_Sloan 23:56:33 2024-04-23 07585614-2220434 07:58:56.2 -22:20:42.9 i_Sloan 23:46:48 2024-04-23 79263 07:59:13.4 -22:28:44.6 i_Sloan 00:00:08 2024-04-24 79305 07:59:52.7 -19:47:48.3 i_Sloan 01:03:50 2024-04-25 07595685-2210083 07:59:56.9 -22:10:08.0 i_Sloan 00:02:37 2024-04-24 08000411-2741493 08:00:04.1 -27:41:49.0 i_Sloan 00:20:15 2024-04-24 86114 08:00:19.0 -24:48:08.6 i_Sloan 00:23:34 2024-04-24 08001933-2225390 08:00:19.4 -22:25:38.8 i_Sloan 00:46:04 2024-04-25 08005056-2718507 08:00:50.6 -27:18:50.3 i_Sloan 00:28:13 2024-04-24 08005453-2722597 08:00:54.5 -27:22:59.6 i_Sloan 00:32:12 2024-04-24 08010965-2426127 08:01:09.7 -24:26:12.6 i_Sloan 00:36:45 2024-04-24 86116 08:01:16.7 -18:22:40.4 i_Sloan 02:08:39 2024-04-25 08011925-2545475 08:01:19.3 -25:45:47.2 i_Sloan 00:52:29 2024-04-24 79455 08:02:23.5 -24:51:16.8 i_Sloan 02:19:21 2024-04-25 85985 08:02:56.1 -17:38:41.9 i_Sloan 00:43:05 2024-04-25 79513 08:03:05.2 -26:12:00.2 i_Sloan 03:32:54 2024-04-25 08030545-2241003 08:03:05.5 -22:41:00.1 i_Sloan 00:39:45 2024-04-25 79523 08:03:17.8 -22:21:44.9 i_Sloan 00:56:22 2024-04-24 08032043-2438176 08:03:20.5 -24:38:17.2 i_Sloan 01:00:16 2024-04-24 AT2024hdo 08:03:28.0 -26:00:43.6 i_Sloan 00:36:42 2024-04-25 79567 08:03:56.2 -22:45:18.3 i_Sloan 01:55:28 2024-04-25 79594 08:04:16.1 -22:50:23.2 i_Sloan 01:03:35 2024-04-24 08041619-2250225 08:04:16.2 -22:50:22.0 i_Sloan 01:06:41 2024-04-24 79611 08:04:30.8 -21:07:41.8 i_Sloan 01:10:47 2024-04-24 08043558-2509271 08:04:35.6 -25:09:26.6 i_Sloan 01:14:23 2024-04-24 08045252-2332340 08:04:52.6 -23:32:33.8 i_Sloan 01:17:46 2024-04-24 08045440-2809421 08:04:54.4 -28:09:41.9 i_Sloan 01:48:13 2024-04-25 79659 08:05:13.4 -28:17:53.9 i_Sloan 01:21:12 2024-04-24 79662 08:05:16.7 -22:49:20.6 i_Sloan 01:24:38 2024-04-24 08052595-1952404 08:05:26.0 -19:52:40.2 i_Sloan 01:59:05 2024-04-25 86141 08:05:31.0 -22:40:00.1 i_Sloan 00:53:42 2024-04-25 08054271-2019104 08:05:42.7 -20:19:10.7 i_Sloan 01:28:03 2024-04-24 79738 08:06:04.3 -22:27:12.1 i_Sloan 01:33:13 2024-04-24 79786 08:06:35.0 -25:11:21.9 i_Sloan 01:40:37 2024-04-24 79842 08:07:20.3 -24:47:03.4 i_Sloan 01:43:57 2024-04-24 79859 08:07:27.0 -21:30:47.8 i_Sloan 01:47:18 2024-04-24 79872 08:07:32.2 -23:24:07.8 i_Sloan 01:50:35 2024-04-24 08074766-1647407 08:07:47.7 -16:47:40.6 i_Sloan 01:53:41 2024-04-24 79934 08:08:18.5 -18:41:07.5 i_Sloan 01:56:51 2024-04-24 861462 08:08:39.1 -18:58:10.5 i_Sloan 02:13:20 2024-04-24 79992 08:08:45.6 -19:59:04.2 z_Sloan 02:30:28 2024-04-24 79993 08:08:46.5 -19:58:50.3 z_Sloan 02:33:25 2024-04-24 79997 08:08:49.9 -24:31:20.2 i_Sloan 01:21:21 2024-04-25 08085158-1850516 08:08:51.6 -18:50:51.2 i_Sloan 02:53:03 2024-04-24 08085438-1539412 08:08:54.4 -15:39:41.1 i_Sloan 02:56:29 2024-04-24 80022 08:09:02.6 -24:27:02.7 i_Sloan 03:01:36 2024-04-24 80028 08:09:07.6 -18:11:58.8 i_Sloan 03:04:55 2024-04-24 08091236-2434441 08:09:12.4 -24:34:44.2 i_Sloan 03:08:28 2024-04-24 86157 08:09:15.1 -18:40:42.5 i_Sloan 03:11:52 2024-04-24 ESO561-018 08:09:15.2 -18:39:52.9 i_Sloan 01:07:11 2024-04-25 80053 08:09:19.3 -18:28:24.8 i_Sloan 03:14:45 2024-04-24 80060 08:09:24.3 -18:32:03.1 i_Sloan 03:18:03 2024-04-24 80061 08:09:24.5 -18:27:47.4 i_Sloan 03:22:01 2024-04-24 08095686-1812076 08:09:56.8 -18:12:07.7 i_Sloan 03:23:19 2024-04-25 80133 08:09:59.7 -20:26:59.5 i_Sloan 03:25:16 2024-04-24 80140 08:10:04.0 -18:02:03.5 i_Sloan 02:12:27 2024-04-25 08103700-1811480 08:10:37.1 -18:11:48.0 i_Sloan 03:28:51 2024-04-24 891963 08:10:51.5 -16:53:49.1 i_Sloan 03:29:49 2024-04-25 80222 08:10:55.9 -18:05:15.0 i_Sloan 03:32:28 2024-04-24 80239 08:11:02.4 -17:01:51.7 i_Sloan 02:05:32 2024-04-25 80249 08:11:06.0 -23:41:21.3 i_Sloan 03:36:16 2024-04-25 80293 08:11:35.4 -24:08:54.7 i_Sloan 03:36:36 2024-04-24 3085162 08:11:58.4 -16:49:33.3 i_Sloan 03:39:56 2024-04-24 80342 08:12:12.9 -17:00:38.9 i_Sloan 03:43:25 2024-04-24 80350 08:12:16.7 -21:47:19.0 i_Sloan 02:15:48 2024-04-25 08131151-2802346 08:13:11.5 -28:02:34.7 i_Sloan 03:46:47 2024-04-24 80468 08:13:37.8 -20:59:46.7 i_Sloan 03:52:46 2024-04-24 80539 08:14:21.3 -15:28:22.9 i_Sloan 02:26:22 2024-04-25 906392 08:14:21.8 -15:47:45.0 i_Sloan 01:51:50 2024-04-25 80596 08:14:50.1 -22:46:14.7 i_Sloan 03:55:35 2024-04-24 909683 08:15:01.6 -15:33:07.6 i_Sloan 01:27:59 2024-04-25 08150201-2253489 08:15:02.0 -22:53:48.7 i_Sloan 01:41:25 2024-04-25 80646 08:15:17.4 -15:35:01.6 i_Sloan 01:14:05 2024-04-25 80665 08:15:29.1 -15:44:02.8 i_Sloan 02:39:58 2024-04-25 08153710-1720514 08:15:37.1 -17:20:51.0 i_Sloan 03:20:07 2024-04-25 08161352-2130238 08:16:13.5 -21:30:23.6 i_Sloan 01:24:35 2024-04-25 08163364-2039438 08:16:33.7 -20:39:43.4 i_Sloan 01:10:21 2024-04-25 08164547-2036118 08:16:45.5 -20:36:11.7 i_Sloan 01:17:58 2024-04-25 08171213-1832346 08:17:12.1 -18:32:34.7 i_Sloan 01:38:13 2024-04-25 6dFJ0817278-1501 08:17:27.8 -15:01:33.7 i_Sloan 02:58:43 2024-04-25 80844 08:17:29.3 -22:29:30.7 i_Sloan 03:16:45 2024-04-25 900792 08:18:00.6 -16:13:59.6 i_Sloan 00:56:58 2024-04-25 80880 08:18:05.8 -20:06:32.0 i_Sloan 01:31:19 2024-04-25 920402 08:18:35.2 -14:45:11.0 i_Sloan 02:42:55 2024-04-25 96401 08:20:29.1 -18:33:26.8 i_Sloan 03:01:57 2024-04-25 6dFJ0821102-1813 08:21:10.2 -18:13:08.6 i_Sloan 02:36:25 2024-04-25 08221434-2041541 08:22:14.3 -20:41:54.0 i_Sloan 02:54:43 2024-04-25 81160 08:24:53.0 -23:13:11.7 i_Sloan 02:22:44 2024-04-25 ESO562-006 08:26:19.2 -20:50:51.6 i_Sloan 00:49:27 2024-04-25 ESO495-013 08:26:26.2 -27:21:36.3 i_Sloan 01:34:47 2024-04-25 08262641-2721375 08:26:26.4 -27:21:37.4 i_Sloan 02:46:20 2024-04-25 152509 08:27:44.4 -21:06:47.0 i_Sloan 02:02:26 2024-04-25 ESO431-011 08:28:47.3 -27:43:12.9 i_Sloan 03:05:46 2024-04-25
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