TNS Astronomical Transient Report No. 241258 [ 2025TNSTR.221....1T ]

Date Received (UTC): 2025-01-17 16:47:31
Date made public:
Sender: ATLAS_Bot1
Reporting Group: ATLAS     Discovery Data Source: ATLAS

J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU) report/s the discovery of a new astronomical transient.

IAU Designation: SN 2025ou
Discoverer internal name: ATLAS25alu
Coordinates (J2000): RA = 14:48:06.550 (222.02729) DEC = +31:44:44.16 (31.7456)
Discovery date: 2025-01-17 13:50:14.784 (JD=2460693.07656)



Photometry

Discovery (first detection):
Discovery date: 2025-01-17 13:50:14.784
Flux: 18.894 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-01
Telescope: ATLAS Mauna Loa

Last non-detection:
Last non-detection date: 2025-01-16 14:35:53
Limiting flux: 19.02 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-01
Telescope: ATLAS Mauna Loa


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