{
  "eventId": "LIGO/Virgo/KAGRA S250206dm",
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "createdOn": 1739823656008,
  "submittedHow": "email",
  "circularId": 39355,
  "bibcode": "2025GCN.39355....1P",
  "body": " A. Pozanenko (IKI, HSE), A. Volnova (IKI), N. Pankov (HSE, IKI), R. Ya.\nInasaridze (AbAO) report on behalf of IKI GRB-FuN collaboration:\n\nWe continue to observe galaxies from the NED/GLADE+ catalogs in the\nlocalization volume S250206dm (LIGO Scientific Collaboration, GCN 39175;\nLIGO Scientific Collaboration, GCN 39184).\nWe observed several galaxies with AS-32 telescope of the Abastumani\nObservatory (AbAO) in the R-filter. The observations consist of 3 exposures\nin R-filter of each galaxy in the on Feb., 12 and Feb. 16. In the first\nepoch of observations near the galaxy WISEA J021210.14+514821.7 we clearly\ndetected an optical source which is not present in the PS1 catalog. The\nsource is visible in each of the 3 exposures. The source is not detected in\nthe following epoch on February 16. Preliminary photometry of stacked\nimages is the following\n\nDate |UTstart |t-T0* |MJD_mid |Exp. |Filter|OT |Err |UL |FWHM\n| |(mid, days)| |(n*s) | | | |(3sigma)|\"\n----------------------------------------------------------------------------\n2025-02-12|15:46:10| 5.76573|60718.65844| 3*60 |R |18.15|0.21|19.0 |3.1\n2025-02-16|15:57:48| 9.77361|60722.66632| 3*60 |R | n/d |n/d |19.1 |3.0\n* - T0 = 21:25:30.439 UTC LIGO trigger time of S250206dm\n\nPhotometry is based on nearby stars from USNO-B1.0:\nID RA Dec R2\n1418-00067499 02:12:12.126 +51:49:52.59 14.68\n1418-00067498 02:12:12.025 +51:48:41.88 14.94\n1418-00067549 02:12:18.069 +51:48:21.33 13.93\n\nThe source coordinates are (J2000) 02:12:10.17 +51:48:21.54, and the offset\nfrom the center of the galaxy is 6.2\", which is equivalent to 11 kpc at a\nluminosity distance of DL = 457 Mpc (GLADE+).\n\nWe have not observed this galaxy before, so we cannot say anything about\nthe nature of this source and further observations and analysis of further\nobservations of this galaxy are needed.\n",
  "subject": "LIGO/Virgo/KAGRA S250206dm: observation in AbAO, optical transient near NED/GLADE+ galaxy WISEA J021210.14+514821.7"
}