TNS Astronomical Transient Report No. 313041 [ 2026TNSTR2825....1S ]
Date Received (UTC): 2026-07-07 08:17:46
Date made public:
Sender: LVRA
Reporting Group: Lasair Discovery Data Source: Rubin
H. F. Stevance, K. W. Smith, S. J. Smartt (Oxford/QUB), R. D. Williams, G. P. Francis (Edinburgh), D. R. Young (QUB), A. Lawrence, T. M. Sloan (Edinburgh) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026sem
Discoverer internal name: LSST-AP-DO-170631096453038433
Coordinates (J2000): RA = 20:23:59.853 (305.99938614522) DEC = -16:01:37.86 (-16.027183632583)
Discovery date: 2026-07-07 07:55:25.824 (JD=2461228.83016)
Photometry
Discovery (first detection):
Discovery date: 2026-07-07 07:55:25.824
Flux: 21.9657 ABMag
Filter: i-LSST
Instrument: LSSTCam
Telescope: Rubin Observatory - Simonyi Survey Telescope
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026sem
Date Received (UTC): 2026-07-07 08:17:46
Date made public:
Sender: LVRA
Reporting Group: Lasair Discovery Data Source: Rubin
H. F. Stevance, K. W. Smith, S. J. Smartt (Oxford/QUB), R. D. Williams, G. P. Francis (Edinburgh), D. R. Young (QUB), A. Lawrence, T. M. Sloan (Edinburgh) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026sem
Discoverer internal name: LSST-AP-DO-170631096453038433
Coordinates (J2000): RA = 20:23:59.853 (305.99938614522) DEC = -16:01:37.86 (-16.027183632583)
Discovery date: 2026-07-07 07:55:25.824 (JD=2461228.83016)
Photometry
Discovery (first detection):
Discovery date: 2026-07-07 07:55:25.824
Flux: 21.9657 ABMag
Filter: i-LSST
Instrument: LSSTCam
Telescope: Rubin Observatory - Simonyi Survey Telescope
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026sem