TNS Astronomical Transient Report No. 270346 [ 2025TNSTR3718....1T ]
Date Received (UTC): 2025-09-16 17:28:02
Date made public:
Sender: BlackGEM_Bot1
Reporting Group: BlackGEM Discovery Data Source: BlackGEM
H. Tranin, F. Stoppa, D. Pieterse, G. Ramsay, S. Faris, P. Groot, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi report/s the discovery of a new astronomical transient.
IAU Designation: SN 2025xsm
Discoverer internal name: BGEM J041827.63-543825.3
Coordinates (J2000): RA = 04:18:27.632 (64.615133) DEC = -54:38:25.29 (-54.640358)
Discovery date: 2025-09-13 09:22:38.000 (JD=2460931.8907176)
Photometry
Discovery (first detection):
Discovery date: 2025-09-13 09:22:38.000
Flux: 17.74 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam3
Telescope: BlackGEM- 3
Last non-detection:
Last non-detection date: 2025-09-03 08:01:03
Limiting flux: 20.42 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam3
Telescope: BlackGEM- 3
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xsm
Date Received (UTC): 2025-09-16 17:28:02
Date made public:
Sender: BlackGEM_Bot1
Reporting Group: BlackGEM Discovery Data Source: BlackGEM
H. Tranin, F. Stoppa, D. Pieterse, G. Ramsay, S. Faris, P. Groot, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi report/s the discovery of a new astronomical transient.
IAU Designation: SN 2025xsm
Discoverer internal name: BGEM J041827.63-543825.3
Coordinates (J2000): RA = 04:18:27.632 (64.615133) DEC = -54:38:25.29 (-54.640358)
Discovery date: 2025-09-13 09:22:38.000 (JD=2460931.8907176)
Photometry
Discovery (first detection):
Discovery date: 2025-09-13 09:22:38.000
Flux: 17.74 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam3
Telescope: BlackGEM- 3
Last non-detection:
Last non-detection date: 2025-09-03 08:01:03
Limiting flux: 20.42 ABMag
Filter: BG-q-BlackGem
Instrument: BlackGEM-Cam3
Telescope: BlackGEM- 3
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xsm