TNS Astronomical Transient Report No. 242114 [ 2025TNSTR.310....1G ]

Date Received (UTC): 2025-01-23 08:15:08
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 2025aaa
Discoverer internal name: BGEM J091754.07-222055.8
Coordinates (J2000): RA = 09:17:54.074 (139.475308) DEC = -22:20:55.86 (-22.34885)
Discovery date: 2025-01-23 03:45:53.000 (JD=2460698.6568634)


Remarks: [Cosmic ray in a single detection, accidentally reported. ]

Photometry

Discovery (first detection):
Discovery date: 2025-01-23 03:45:53.000
Flux: 18.41 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam3
Telescope: BlackGEM- 3

Last non-detection:
Last non-detection date: 2025-01-22 06:50:23
Limiting flux: 20.98 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam2
Telescope: BlackGEM- 2


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