Dr. Chryssa Kouveliotou, Dr. Alexander van der Horst, and Sarah Chastain (George Washington University) have a request for AAVSO observers. While making radio observations, an unusual radio transient was serendipitously found. They wonder if any AAVSO observers might have been observing at the relevant locations and times, and if any optical transient appears in their images.
Here are the locations/times of interest:
R.A. and Dec. (J2000) Date (UTC)
22:42:55.45,-58:10:01.46,2020-02-21T13:52:37.600000
22:43:31.79,-58:09:33.51,2020-02-21T13:52:45.596617
22:44:03.70,-58:08:28.20,2020-02-21T13:52:53.593233
22:44:36.42,-58:07:44.05,2020-02-21T13:53:01.589850
22:45:10.96,-58:06:45.33,2020-02-21T13:53:09.586468
22:45:47.28,-58:05:46.28,2020-02-21T13:53:17.583085
22:46:27.18,-58:04:47.02,2020-02-21T13:53:25.579703
22:46:51.63,-58:04:14.01,2020-02-21T13:53:33.576319
22:47:27.85,-58:03:20.31,2020-02-21T13:53:41.572937
22:48:00.42,-58:02:25.70,2020-02-21T13:53:49.569554
22:48:34.77,-58:01:37.83,2020-02-21T13:53:57.566172
22:49:10.90,-58:00:35.12,2020-02-21T13:54:05.562789
22:49:43.39,-57:59:46.01,2020-02-21T13:54:13.559406
22:50:19.45,-57:58:49.24,2020-02-21T13:54:21.556023
22:50:50.98,-57:58:06.20,2020-02-21T13:54:29.552641
22:51:26.99,-57:57:01.05,2020-02-21T13:54:37.549259
22:51:59.35,-57:55:48.25,2020-02-21T13:54:45.545876
22:52:37.08,-57:54:41.77,2020-02-21T13:54:53.542492
22:53:08.50,-57:53:56.58,2020-02-21T13:55:01.539109
22:53:44.37,-57:52:48.97,2020-02-21T13:55:09.535726
22:54:17.51,-57:51:48.19,2020-02-21T13:55:17.532344
22:54:56.00,-57:50:39.00,2020-02-21T13:55:25.528961
22:55:27.30,-57:49:44.47,2020-02-21T13:55:33.525579
22:56:00.37,-57:48:49.16,2020-02-21T13:55:41.522195
22:56:32.44,-57:47:24.80,2020-02-21T13:55:49.518813
22:57:09.92,-57:46:27.54,2020-02-21T13:55:57.515430
22:57:44.64,-57:45:15.82,2020-02-21T13:56:05.512048
22:58:17.63,-57:44:32.58,2020-02-21T13:56:13.508665
22:58:52.23,-57:43:05.36,2020-02-21T13:56:21.505282
22:59:26.01,-57:42:06.43,2020-02-21T13:56:29.501899
22:59:58.86,-57:41:07.19,2020-02-21T13:56:37.498517
23:00:31.72,-57:40:14.57,2020-02-21T13:56:45.495135
If any of your images show anything, please post to this forum thread so the astronomers may contact you directly. Many thanks!
Good observing,
Elizabeth Waagen, AAVSO HQ
What variables lie close to those locations?
I checked a number of the coordinates and VSX didn't show any variable stars within 1 degree.
George
Hi,
At the coordinates 22: 42: 55.45 -58: 10: 01.46 ASAS-SN shows a Periodic Variable.
Regards
David
Hi David,
what you see in that ASAS-SN light curve are "fainter thans", that is, non-detections.
Positive detections are shown as coloured diamonds.
The "periodicity" you see is just the Moon cycle. The Moon affects the limiting magnitude with a 29 d. period.
Cheers,
Sebastian
Hi Sebastián,
Ok, the Moon! I already saw that the detections were "fainter than", but I thought they would be relevant.
Thanks Sebastian.
David