TNS Astronomical Transient Report No. 296815 [ 2026TNSTR1216....1P ]
Date Received (UTC): 2026-03-21 01:32:17
Date made public:
Sender: Ismael Perez-Fournon
Reporting Group: SGLF Discovery Data Source: Rubin
I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia, A.E. Hernández-Díaz, E. Lekaroz-Urriza, M. Quintana-Ansaldo (ULL), F. Poidevin (IAC and ULL), C. Jiménez Ángel (GRANTECAN), R. Shirley (MPE), R. Marques-Chaves (Univ. of Geneva), and S. Geier (GRANTECAN & IAC) on behalf of SGLF report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026gup
Discoverer internal name: LSST-AP-DO-313963359364448306
Coordinates (J2000): RA = 03:50:21.917 (57.591321) DEC = -49:54:19.51 (-49.905419)
Discovery date: 2026-01-09 02:48:32.000 (JD=2461049.617037)
Potential host galaxy: DES J035021.94-495419.0
Remarks: Rubin SN candidate in EDFS discovered using the public LSST alerts, the LSST brokers, and our SGLF filters. LSST light curve available at the LSST brokers, e.g.: https://lasair.lsst.ac.uk/objects/313963359364448306/
Photometry
Discovery (first detection):
Discovery date: 2026-01-09 02:48:32.000
Flux: 22.43 ABMag
Filter: g-LSST
Instrument: LSSTCam
Telescope: Rubin Observatory - Simonyi Survey Telescope
Last non-detection:
Archival info: Other
Remarks: No catalogued source at this position.
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026gup
Date Received (UTC): 2026-03-21 01:32:17
Date made public:
Sender: Ismael Perez-Fournon
Reporting Group: SGLF Discovery Data Source: Rubin
I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia, A.E. Hernández-Díaz, E. Lekaroz-Urriza, M. Quintana-Ansaldo (ULL), F. Poidevin (IAC and ULL), C. Jiménez Ángel (GRANTECAN), R. Shirley (MPE), R. Marques-Chaves (Univ. of Geneva), and S. Geier (GRANTECAN & IAC) on behalf of SGLF report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026gup
Discoverer internal name: LSST-AP-DO-313963359364448306
Coordinates (J2000): RA = 03:50:21.917 (57.591321) DEC = -49:54:19.51 (-49.905419)
Discovery date: 2026-01-09 02:48:32.000 (JD=2461049.617037)
Potential host galaxy: DES J035021.94-495419.0
Remarks: Rubin SN candidate in EDFS discovered using the public LSST alerts, the LSST brokers, and our SGLF filters. LSST light curve available at the LSST brokers, e.g.: https://lasair.lsst.ac.uk/objects/313963359364448306/
Photometry
Discovery (first detection):
Discovery date: 2026-01-09 02:48:32.000
Flux: 22.43 ABMag
Filter: g-LSST
Instrument: LSSTCam
Telescope: Rubin Observatory - Simonyi Survey Telescope
Last non-detection:
Archival info: Other
Remarks: No catalogued source at this position.
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026gup