RA/DEC (2000)
08:50:38.296 -00:59:21.78
132.6595658 -0.9893836
Type
AGN
Redshift
0.2697
Discovery ReportClassification Report
Related AstroNotes: 2026-139
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-12-11 10:59:17.998
TNS AT
Y
Public
Y
Discovery Mag
20.4488
Filter
g-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025alls - 2021-01-13 00:00:00 Sloan / BOSS (SDSS)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
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▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
▌Show [O I] at z=vexp= km/s
▌Show O II at z=vexp= km/s
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▌Show [O III] at z=vexp= km/s
▌Show O V at z=vexp= km/s
▌Show O VI at z=vexp= km/s
▌Show Na at z=vexp= km/s
▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
▌Show Si II at z=vexp= km/s
▌Show S II at z=vexp= km/s
▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
▌Show Fe II at z=vexp= km/s
▌Show Fe III at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
23760 2021-01-13 00:00:00 Sloan / BOSS SDSS/APO SDSS tns_AT_2025alls_2459227.5_Sloan_BOSS_SDSS.ascii Object 2026-06-01 SDSS/DR19 eFEDS spectrum
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2026-01-16 07:55:51 - 2026-01-16 07:55:51 2461056.8304514 - 2461056.8304514 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
550678 2026-01-16 07:55:51 2461056.8304514 19.7989 0.154484 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-12-07 08:37:57 - 2025-12-11 10:59:18 2461016.8596875 - 2461020.9578472 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
550677 2025-12-11 10:59:18 2461020.9578472 20.4488 0.194576 ABMag g-ZTF P48_ZTF-Cam
550676 2025-12-07 08:37:57 2461016.8596875 18.7715 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
287482 2026-01-16 09:16:07 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 08:50:38.296 -00:59:21.78 2025-12-11 10:59:17.998 20.4488 g-ZTF PSN ZTF25achvfus ZTF 2026TNSTR.188....1S N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
23756 2026-05-18 10:46:14 Benny Trakhtenbrot Benny Trakhtenbrot (Tel Aviv U.), Franz Bauer (U. de Tarapaca), Paula Silva (PUC Chile, U. de Tarapaca), Jessie Runnoe (Vanderbilt), Andrea Merloni (MPE), John Donor (Texas Christian U.), Sean Morrison (U. of Illinois), Mike Eracleous (Penn State), Mirko Krumpe (AIP), Kriti Kamal Gupta (AIP), Grisha Zeltyn (Tel Aviv U.), Anton M. Koekemoer (STScI), Thomas Kupfer (U. of Hamburg), Donald P. Schneider (Penn State), Juna A. Kollmeier (Carnegie Observatories), Scott Anderson (U. of Washington), Roberto Assef (U. Diego Portales), William Nielsen Brandt (Penn State), Igor Chilingarian (SAO/CfA), Xinyu Dai (U. of Oklahoma), Megan Davis (U. of Connecticut), Boris Gaensicke (U. of Warwick), Lorena Hernández-García (U. Diego Portales), Chenxu Liu (Yunnan U.), Devika Mukhi Nilo (PUC Chile), Margarita Pereyra (UNAM Ensenada), Mara Salvato (MPE), José Sánchez-Gallego (U. of Washington), Axel Schwope (IAP), Guy Stringfellow (U. of Colorado, Boulder), Hector Hernandez Toledo (UNAM), Qian Yang (CfA) SDSS AGN 0.2697 1 SDSS The new SDSS-V spectrum (obtained through the new ToO capability) shows a significantly bluer continuum compared to the archival SDSS spectrum of this X-ray emitting AGN, and exhibits a substantial increase in the flux of broad Balmer lines. These spectral changes resemble what is seen in changing-look AGN. We therefore classified AT 2025alls as an AGN undergoing a significant brightening event. 2026TNSCR2165....1T
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
23760 2021-01-13 00:00:00 Sloan / BOSS SDSS/APO SDSS tns_AT_2025alls_2459227.5_Sloan_BOSS_SDSS.ascii Object 2026-06-01 SDSS/DR19 eFEDS spectrum

Comments