TNS Astronomical Transient Report No. 259517 [ 2025TNSTR2340....1R ]

Date Received (UTC): 2025-06-21 05:06:36
Date made public:
Sender: BTSbot_bot
Reporting Group: ZTF     Discovery Data Source: ZTF

Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025okn
Discoverer internal name: ZTF19aalsmdv
Coordinates (J2000): RA = 13:14:22.468 (198.5936159) DEC = +57:49:38.71 (57.8274186)
Discovery date: 2025-05-30 05:46:30.000 (JD=2460825.740625)


Remarks: Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).

Photometry

Discovery (first detection):
Discovery date: 2025-05-30 05:46:30.000
Flux: 17.2473 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Last non-detection:
Last non-detection date: 2025-05-28 05:18:13
Limiting flux: 20.4937 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin


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