TNS Astronomical Transient Report No. 265674 [ 2025TNSTR3178....1G ]

Date Received (UTC): 2025-08-13 12:42:03
Date made public:
Sender: BlackGEM_Bot1
Reporting Group: BlackGEM     Discovery Data Source: BlackGEM

P. Groot, H. Tranin, F. Stoppa, D. Pieterse, G. Ramsay, S. Faris, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025tsz
Discoverer internal name: BGEM J003904.40-425802.5
Coordinates (J2000): RA = 00:39:04.410 (9.768375) DEC = -42:58:02.60 (-42.967389)
Discovery date: 2025-08-06 10:24:14.000 (JD=2460893.9334954)



Photometry

Discovery (first detection):
Discovery date: 2025-08-06 10:24:14.000
Flux: 19.78 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam4
Telescope: BlackGEM- 4

Last non-detection:
Last non-detection date: 2025-07-18 09:57:48
Limiting flux: 21.07 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam4
Telescope: BlackGEM- 4


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