TITLE: GCN CIRCULAR NUMBER: 39338 SUBJECT: LIGO/Virgo/KAGRA S250206dm: MASTER LC AT2025bbo DATE: 25/02/15 17:47:56 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, N.Tiurina, D.Vlasenko, P.Balanutsa, I.Panchenko, A.Chasovnikov K.Zhirkov, G.Antipov, A.Sankovich, I.Gorbunov, A.Sosnovskij, Yu.Tselik, Ya.Kechin, V.Senik, V.Topolev (Lomonosov MSU), O.Gress, N.Budnev, O.Ershova (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), D.Buckley (SAAO), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) Global MASTER robotic net (Lipunov, Kornilov, Gorbovskoy, Tiurina & Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591, pp.http://www.pereplet.ru/lipunov/625.html#625) continued to observe OT AT2025bbo (Smart et al., GCN 39244) in GW LVK error area S250206dm (The LIGO-Virgo-Kagra Collaboration, GCN 39175): Date UT Exp Filter Site m err 250208 15:31:43 95 Clear MASTER600-Tunka >19.3 250209 16:54:16 1440 ~Rc MASTER-Kislovodsk 19.10 0.15 250209 18:25:58 3960 ~Rc MASTER-Kislovodsk 19.48 0.05 250210 16:30:06 2880 ~Rc MASTER-Kislovodsk 19.86 0.06 250212 16:02:30 3960 ~Rc MASTER-Kislovodsk >20.1 We did not see any variability in ATboo galaxy on arhive images. The galaxy arhive light curve from 2010 year is available at http://www.pereplet.ru/lipunov/images/ATbbo_galaxy_arhive_midi.jpg View this GCN Circular online at https://gcn.nasa.gov/circulars/39338. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...