TNS Astronomical Transient Report No. 269803 [ 2025TNSTR3664....1T ]
Date Received (UTC): 2025-09-12 18:39:59
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 (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 2025xhh
Discoverer internal name: ATLAS25lfa
Coordinates (J2000): RA = 16:38:27.556 (249.614817143) DEC = +45:29:42.81 (45.4952242857)
Discovery date: 2025-09-11 05:59:29.760 (JD=2460929.74965)
Photometry
Discovery (first detection):
Discovery date: 2025-09-11 05:59:29.760
Flux: 19.345 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-01
Telescope: ATLAS Mauna Loa
Last non-detection:
Last non-detection date: 2025-09-09 23:02:20
Limiting flux: 18.78 ABMag
Filter: wide-ATLAS
Instrument: ATLAS-05
Telescope: ATLAS Teide Tenerife
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xhh
Date Received (UTC): 2025-09-12 18:39:59
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 (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 2025xhh
Discoverer internal name: ATLAS25lfa
Coordinates (J2000): RA = 16:38:27.556 (249.614817143) DEC = +45:29:42.81 (45.4952242857)
Discovery date: 2025-09-11 05:59:29.760 (JD=2460929.74965)
Photometry
Discovery (first detection):
Discovery date: 2025-09-11 05:59:29.760
Flux: 19.345 ABMag
Filter: orange-ATLAS
Instrument: ATLAS-01
Telescope: ATLAS Mauna Loa
Last non-detection:
Last non-detection date: 2025-09-09 23:02:20
Limiting flux: 18.78 ABMag
Filter: wide-ATLAS
Instrument: ATLAS-05
Telescope: ATLAS Teide Tenerife
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025xhh