TNS Astronomical Transient Report No. 308277 [ 2026TNSTR2493....1M ]
Date Received (UTC): 2026-06-13 04:10:52
Date made public:
Sender: Scott McClure
Reporting Group: None Discovery Data Source: ZTF
Scott McClure report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026paz
Discoverer internal name: ZTF24aaxjybq
Coordinates (J2000): RA = 17:25:50.045 (261.4585221) DEC = -25:10:42.38 (-25.1784402)
Discovery date: 2026-05-20 09:00:14.000 (JD=2461180.875162)
Potential host galaxy: 2MASS J17255005-2510420
Remarks: Transient identified by JBB Sentinel, an automated ZTF alert stream anomaly detection pipeline (Ghostline Research, ghostline.boo). Source is 2MASS J17255005-2510420 (SIMBAD classification: Long-Period Variable Candidate, LP?), a red giant with 2MASS K=7.735, J=9.415, H=8.214. Currently at i~12.9 apparent magnitude — approximately 1.1 mag brighter than Gaia DR3 quiescent G=14.08. Long-baseline ALeRCE forced photometry shows repeated outbursts since MJD 58,000 (2018). Galactic latitude 5.73 degrees. No prior TNS report within 30 arcseconds. Spectroscopic classification requested to determine nature of outburst.
Photometry
Discovery (first detection):
Discovery date: 2026-05-20 09:00:14.000
Flux: 19.087 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin
Last non-detection:
Last non-detection date: 2026-05-10 11:02:32
Limiting flux: 20.017 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin
Remarks: Err: 0.112
Archival info: Other
Remarks: ZTF archive shows 91 non-detections prior to discovery. Long-baseline forced photometry shows prior outbursts since MJD 58000 (2018).
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026paz
Date Received (UTC): 2026-06-13 04:10:52
Date made public:
Sender: Scott McClure
Reporting Group: None Discovery Data Source: ZTF
Scott McClure report/s the discovery of a new astronomical transient.
IAU Designation: AT 2026paz
Discoverer internal name: ZTF24aaxjybq
Coordinates (J2000): RA = 17:25:50.045 (261.4585221) DEC = -25:10:42.38 (-25.1784402)
Discovery date: 2026-05-20 09:00:14.000 (JD=2461180.875162)
Potential host galaxy: 2MASS J17255005-2510420
Remarks: Transient identified by JBB Sentinel, an automated ZTF alert stream anomaly detection pipeline (Ghostline Research, ghostline.boo). Source is 2MASS J17255005-2510420 (SIMBAD classification: Long-Period Variable Candidate, LP?), a red giant with 2MASS K=7.735, J=9.415, H=8.214. Currently at i~12.9 apparent magnitude — approximately 1.1 mag brighter than Gaia DR3 quiescent G=14.08. Long-baseline ALeRCE forced photometry shows repeated outbursts since MJD 58,000 (2018). Galactic latitude 5.73 degrees. No prior TNS report within 30 arcseconds. Spectroscopic classification requested to determine nature of outburst.
Photometry
Discovery (first detection):
Discovery date: 2026-05-20 09:00:14.000
Flux: 19.087 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin
Last non-detection:
Last non-detection date: 2026-05-10 11:02:32
Limiting flux: 20.017 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin
Remarks: Err: 0.112
Archival info: Other
Remarks: ZTF archive shows 91 non-detections prior to discovery. Long-baseline forced photometry shows prior outbursts since MJD 58000 (2018).
Details of the new object can be viewed here: https://www.wis-tns.org/object/2026paz