TNS Astronomical Transient Report No. 271028 [ 2025TNSTR3817....1T ]
Date Received (UTC): 2025-09-23 14:45:03
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: SN 2025yii
Discoverer internal name: ATLAS25lvv
Coordinates (J2000): RA = 06:44:20.302 (101.08459) DEC = -63:43:32.80 (-63.7257766667)
Discovery date: 2025-09-23 07:42:57.600 (JD=2460941.8215)
Photometry
Discovery (first detection):
Discovery date: 2025-09-23 07:42:57.600
Flux: 19.259 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Last non-detection:
Last non-detection date: 2025-09-22 09:36:01
Limiting flux: 18.83 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025yii
Date Received (UTC): 2025-09-23 14:45:03
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: SN 2025yii
Discoverer internal name: ATLAS25lvv
Coordinates (J2000): RA = 06:44:20.302 (101.08459) DEC = -63:43:32.80 (-63.7257766667)
Discovery date: 2025-09-23 07:42:57.600 (JD=2460941.8215)
Photometry
Discovery (first detection):
Discovery date: 2025-09-23 07:42:57.600
Flux: 19.259 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Last non-detection:
Last non-detection date: 2025-09-22 09:36:01
Limiting flux: 18.83 ABMag
Filter: cyan-ATLAS
Instrument: ATLAS-04
Telescope: ATLAS El Sauce
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025yii