TNS Astronomical Transient Report No. 255982 [ 2025TNSTR1897....1B ]

Date Received (UTC): 2025-05-22 19:31:51
Date made public:
Sender: MASTER
Reporting Group: MASTER     Discovery Data Source: MASTER

P.Balanutsa, V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), 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) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025lho
Discoverer internal name: MASTER OT J123035.05-384823.0
Coordinates (J2000): RA = 12:30:35.050 (187.646042) DEC = -38:48:23.00 (-38.806389)
Discovery date: 2025-05-22 01:21:17.280 (JD=2460817.55645)


Remarks: CV outburst, ampl>4.6(last nondetection at 28Jan2025 with mlim=20.7

Photometry

Discovery (first detection):
Discovery date: 2025-05-22 01:21:17.280
Flux: 16.2 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other

Remarks: MASTER-OAFA

Last non-detection:
Last non-detection date: 2025-01-28 05:50:29
Limiting flux: 20.8 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other

Remarks: MASTER-OAFA

Archival info: Other
Remarks: MASTER

Details of the new object can be viewed here: https://www.wis-tns.org/object/2025lho