TNS Astronomical Transient Report No. 259836 [ 2025TNSTR2357....1M ]

Date Received (UTC): 2025-06-23 21:57:20
Date made public:
Sender: ALeRCE
Reporting Group: ALeRCE     Discovery Data Source: ZTF

A. Munoz-Arancibia, F.E. Bauer, G. Pignata, F. Forster, A. Mourao, S. Jurado, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, F. Andrades, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025osz
Discoverer internal name: ZTF25aawwxlk
Coordinates (J2000): RA = 19:52:35.927 (298.149694121) DEC = +46:48:37.58 (46.810439872487)
Discovery date: 2025-06-23 07:15:44.001 (JD=2460849.8025926)

Potential host galaxy: WISEA J195235.78+464837.6

Remarks: SN candidate classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25aawwxlk

Photometry

Discovery (first detection):
Discovery date: 2025-06-23 07:15:44.001
Flux: 20.5953 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2025-06-21 08:46:48
Limiting flux: 20.7618 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

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