RA/DEC (2000)
22:13:33.539 -22:30:51.97
333.389746 -22.514436
Type
AGN
Redshift
0.13
Discovery ReportClassification Report
Related AstroNotes: 2025-319
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-06-08 04:35:01.536
TNS AT
Y
Public
Y
Discovery Mag
19
Filter
L-GOTO
Reporter/s
S. Belkin, G. Ramsay, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, D. O'Neill, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025ukn - 2025-10-21 20:51:03 SAAO / G-Spec (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
▌Show WR-WC/O at z=vexp= km/s
   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
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌ML1_MeerLICHT-Cam_BG-q
   
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
22386 2025-10-21 20:51:03 SAAO / G-Spec 3600 Lloyd Landsberg Lloyd Landsberg None tns_AT_2025ukn_2025-10-21_20-51-03_SAAO_G-Spec_None.csv Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-06-08 04:35:02 - 2025-06-08 04:35:02 2460834.690995 - 2460834.690995 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
510007 2025-06-08 04:35:02 2460834.690995 19 0.15 ABMag L-GOTO GOTO-N_GOTO-2 180
L-GOTO GOTO-N_GOTO-1 2025-05-30 05:03:52 - 2025-05-30 05:03:52 2460825.711021 - 2460825.711021 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
510006 2025-05-30 05:03:52 2460825.711021 19 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-10-18 00:01:54 - 2025-10-18 00:01:54 2460966.5013194 - 2460966.5013194 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
525201 2025-10-18 00:01:54 2460966.5013194 17.83 0.06 20.33 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
BG-q-BlackGem ML1_MeerLICHT-Cam 2021-06-20 01:14:35 - 2021-06-20 01:14:35 2459385.551794 - 2459385.551794 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
525200 2021-06-20 01:14:35 2459385.551794 20.37 ABMag BG-q-BlackGem ML1_MeerLICHT-Cam 60 robotic [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
274063 2025-10-20 12:49:02 BlackGEM_Bot1 P. Groot,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 22:13:33.539 -22:30:51.97 2025-10-18 00:01:54.000 17.83 BG-q-BlackGem PSN BGEM J221333.54-223052.0 BlackGEM N
266462 2025-08-18 06:30:35 GOTO_bot S. Belkin,G. Ramsay,K. Ackley et al. GOTO GOTO 22:13:33.623 -22:30:51.92 2025-06-08 04:35:01.536 19 L-GOTO Other GOTO25fze GOTO 2025TNSTR3256....1B N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22385 2025-11-10 09:19:23 Sara Faris Sara Faris (TAU), Lloyd Landsberg, Francois Campher and Moses Mlangeni (UCT), Fiorenzo Stoppa (Oxf), Iair Arcavi (TAU), Paul Groot (Radboud U) None AGN 0.13 1 We classify this source as an Extreme Nuclear Transient (ENT), based on a blue continuum with broad Balmer lines and a ~200-day rise to ~−22 mag. 2025TNSCR4519....1F
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
22386 2025-10-21 20:51:03 SAAO / G-Spec 3600 Lloyd Landsberg Lloyd Landsberg None tns_AT_2025ukn_2025-10-21_20-51-03_SAAO_G-Spec_None.csv Object

Comments

TNS
System

Mon, 10/20/2025 - 12:49

Object coordinates updated

Object coordinates updated according to AT-report 274063 of Group BlackGEM
Previous RA, DEC: 22:13:33.623, -22:30:51.92 (333.390096, -22.514422)
Updated RA, DEC: 22:13:33.539, -22:30:51.97 (333.389746, -22.514436)