TITLE: GCN CIRCULAR NUMBER: 24478 SUBJECT: LIGO/Virgo S190510g: MASTER OT independ detection in WISE J060606.26-353233.9 galaxy at desgw-190510a position. DATE: 19/05/11 10:31:51 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, N.Tyurina, E. Gorbovskoy, V.Kornilov, D.Vlasenko, P.Balanutsa,D.Vlasenko, V.Vladimirov, D.Zimnukhov, A.Kuznetsov, P.Balanutsa, I.Gorbunov, A. Chasovnikov, F.Balakin, V.Grinshpun, T.Pogrosheva (Lomonosov Moscow State University, SAI, Physics Department), D. Buckley (South African Astronomical Observatory), A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias), R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA, San Juan National University), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE,SJNU) O. Gress, N.M. Budnev, O.Ershova (Applied Physics Institute, Irkutsk Stat University), V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk EducationState University), After publication OT desgw-190510a detection (Jim Annis et al., GCN 24474) After the publication OT desgw-190510a detection (Jim Annis et al., GCN 24474), the we checked the candidates of the MASTER-SAAO robots and found MASTER transient in this place. MASTER OT J060606.43-353229.8 at desgw-190510a position. MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 06h 06m 06.43s -35d 32m 29.8s on ~ 2019-05-10 UT. The OT unfiltered magnitude is ~20 m in our red CCD. The OT is seen in 2 images. There is no minor planet at this place. We have reference image on 2019-02-04.86162 UT with unfiltered mlim= 20.2 m. Folow up observations are required.