RA/DEC (2000)
12:55:07.057 +34:08:46.95
193.779403 +34.146376
Type
AGN
Redshift
0.1654
Discovery ReportClassification Report
Related AstroNotes: 2025-341, 2025-348, 2026-5
Reporting Group
Fink
Discovering Data Source
Fink
Discovery Date
2025-11-23 12:50:56.000
TNS AT
Y
Public
Y
Host Name
SDSS J125507.07+340846.6
Host Redshift
0.165
Discovery Mag
19.19
Filter
g-ZTF
Reporter/s
Miguel Llamas Lanza (IRAP), Erwan Quintin (ESA), Etienne Russeil (Stockholm U), Sergey Karpov (FZU), Emille Ishida (LPC)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025afsj - 2026-01-09 13:18:51 FTN / FLOYDS-N (None)z=
 ▌AT_2025afsj - 2025-12-20 00:00:00 Lijiang-2.4m / YFOSC (None)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
▌Show C III at z=vexp= km/s
▌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
▌Show [O II] at z=vexp= km/s
▌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
▌Show Å at z=vexp= km/s
▌Show Tellurics 
▌Show Galaxy lines at z=
▌Show WR-WN 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

 ▌GOTO-N_GOTO-2_L
 ▌GOTO-N_GOTO-1_L
 ▌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
22773 2026-01-09 13:18:51 FTN / FLOYDS-N 2700 Robotic None tns_2025afsj_2026-01-09_13-18-51_FTN_FLOYDS-N_None.ascii tns_2025afsj_2026-01-09_13-18-51_FTN_FLOYDS-N_None.fits Object
22691 2025-12-20 00:00:00 Lijiang-2.4m / YFOSC Linna Xu None tns_2025afsj_2025-12-20_Lijiang-2.4m_YFOSC_None.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-11-27 06:23:19 - 2025-11-27 06:23:19 2461006.766186 - 2461006.766186 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
543627 2025-11-27 06:23:19 2461006.766186 18.86 0.08 ABMag L-GOTO GOTO-N_GOTO-2 180
L-GOTO GOTO-N_GOTO-1 2025-08-16 21:04:04 - 2025-08-16 21:04:04 2460904.37782 - 2460904.37782 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
543626 2025-08-16 21:04:04 2460904.37782 19.6 ABMag L-GOTO GOTO-N_GOTO-1 360 [Last non detection]
g-ZTF P48_ZTF-Cam 2025-11-23 12:50:56 - 2025-11-23 12:50:56 2461003.0353704 - 2461003.0353704 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535763 2025-11-23 12:50:56 2461003.0353704 19.19 0.1 ABMag g-ZTF P48_ZTF-Cam
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
282673 2025-12-28 10:16:08 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 12:55:07.057 +34:08:46.95 2025-11-27 06:23:18.816 18.86 L-GOTO Other GOTO25koh GOTO N
279229 2025-12-02 12:13:45 Miguel Llamas Lanza Miguel Llamas Lanza (IRAP), Erwan Quintin (ESA), Etienne Russeil (Stockholm U) et al. Fink Fink 12:55:07.090 +34:08:46.70 2025-11-23 12:50:56.000 19.19 g-ZTF NUC SDSS J125507.07+340846.6 ZTF18aaxqitv Fink Burst with an amplitude of ~0.75 mag, in clear excess of the previous AGN-like variability around 0.2mag. The peak absolute magnitude of the transient is -20.6 for now, still rising. The host is a Type 1, with a SDSS spectrum and a DESI spectrum 2025TNSTR4795....1L N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22772 2026-01-15 17:12:34 Benny Trakhtenbrot Benny Trakhtenbrot None AGN 1 We re-classify this nuclear transient as a Bowen Fluorescence Flare (BFF) - based on the OIII 3133A line and HeII 4686A + NIII 4640A blend. 2026TNSCR.174....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
22773 2026-01-09 13:18:51 FTN / FLOYDS-N 2700 Robotic None tns_2025afsj_2026-01-09_13-18-51_FTN_FLOYDS-N_None.ascii tns_2025afsj_2026-01-09_13-18-51_FTN_FLOYDS-N_None.fits Object
22690 2025-12-27 09:09:38 Mingxin Wu Mingxin Wu (USTC), Ning Jiang (USTC), Linna Xu (USTC), Shifeng Huang (USTC), Yibo Wang (USTC), Tinggui Wang (USTC), Chengyi Wang (USTC), Jiazheng Zhu (USTC) None TDE 0.1654 1 The spectrum shows a significantly bluer continuum compared to the archival SDSS spectrum of the host galaxy and exhibits a prominent broad He II λ4686 emission line, along with a substantial increase in the flux of broad Balmer lines. These spectral characteristics are consistent with those of tidal disruption events (TDE-H+He). So we tentatively classified AT2025afsj as a TDE in AGN. 2025TNSCR5192....1W
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
22691 2025-12-20 00:00:00 Lijiang-2.4m / YFOSC Linna Xu None tns_2025afsj_2025-12-20_Lijiang-2.4m_YFOSC_None.txt Object

Comments

TNS
System

Sun, 12/28/2025 - 10:16

Object coordinates updated

Object coordinates updated according to AT-report 282673 of Group GOTO
Previous RA, DEC: 12:55:07.090, +34:08:46.70 (193.779542, +34.146306)
Updated RA, DEC: 12:55:07.057, +34:08:46.95 (193.779403, +34.146376)