TNS Astronomical Transient Report No. 270690 [ 2025TNSTR3766....1T ]
Date Received (UTC): 2025-09-19 17:38:59
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), M. R. Alarcón, J. Licandro, P. Nichita (IAC), 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, P. J. Broda (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (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: AT 2025xzm
Discoverer internal name: ATLAS25lsg
Coordinates (J2000): RA = 23:58:30.323 (359.626344286) DEC = -36:33:04.25 (-36.5511814286)
Discovery date: 2025-09-19 06:10:49.728 (JD=2460937.75752)
Photometry
Discovery (first detection):
Discovery date: 2025-09-19 06:10:49.728
Flux: 19.309 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Last non-detection:
Last non-detection date: 2025-09-17 22:36:00
Limiting flux: 19.63 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-03
Telescope: ATLAS Sutherland
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xzm
Date Received (UTC): 2025-09-19 17:38:59
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), M. R. Alarcón, J. Licandro, P. Nichita (IAC), 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, P. J. Broda (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (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: AT 2025xzm
Discoverer internal name: ATLAS25lsg
Coordinates (J2000): RA = 23:58:30.323 (359.626344286) DEC = -36:33:04.25 (-36.5511814286)
Discovery date: 2025-09-19 06:10:49.728 (JD=2460937.75752)
Photometry
Discovery (first detection):
Discovery date: 2025-09-19 06:10:49.728
Flux: 19.309 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Last non-detection:
Last non-detection date: 2025-09-17 22:36:00
Limiting flux: 19.63 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-03
Telescope: ATLAS Sutherland
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xzm