RA/DEC (2000)
21:51:06.439 +03:35:08.49
327.776829 +3.5856914
Type
SLSN-I
Redshift
0.1745
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-10-10 10:44:03.264
TNS AT
Y
Public
Y
Discovery Mag
19.63
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025zsz - 2025-11-16 22:23:54 NOT / ALFOSC (ZTF)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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌GOTO-N_GOTO-1_L
 ▌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
22429 2025-11-16 22:23:54 NOT / ALFOSC Steve Schulze, Jesper Sollerman Steve Schulze ZTF tns_2025zsz_2025-11-16_22-23-54.311_NOT_ALFOSC_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-10-22 21:06:38 - 2025-10-22 21:06:38 2460971.37961 - 2460971.37961 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
525933 2025-10-22 21:06:38 2460971.37961 19.869 0.151 20.32 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-3 2025-10-10 10:44:03 - 2025-10-10 10:44:03 2460958.947262 - 2460958.947262 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522731 2025-10-10 10:44:03 2460958.947262 19.63 0.14 ABMag L-GOTO GOTO-S_GOTO-3 180
cyan-ATLAS ATLAS-STH_ATLAS-03 2025-10-21 19:57:38 - 2025-10-21 19:57:38 2460970.33169 - 2460970.33169 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
525932 2025-10-21 19:57:38 2460970.33169 19.46 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-10-09 20:22:57 - 2025-10-09 20:22:57 2460958.349266 - 2460958.349266 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
522730 2025-10-09 20:22:57 2460958.349266 19.9 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-10-31 03:04:18 - 2025-11-08 01:49:38 2460979.6279861 - 2460987.5761343 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
529621 2025-11-08 01:49:38 2460987.5761343 18.9138 0.0587282 ABMag r-ZTF P48_ZTF-Cam
529619 2025-10-31 03:04:18 2460979.6279861 16.2166 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-11-06 04:34:39 - 2025-11-06 04:34:39 2460985.6907292 - 2460985.6907292 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
529620 2025-11-06 04:34:39 2460985.6907292 19.2033 0.190729 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
276028 2025-11-08 10:56:10 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 21:51:06.439 +03:35:08.49 2025-11-06 04:34:39.002 19.2033 g-ZTF PSN ZTF25abwcymj ZTF N
274369 2025-10-23 09:37:00 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 21:51:06.454 +03:35:08.37 2025-10-22 21:06:38.304 19.869 wide-ATLAS PSN ATLAS25neb ATLAS N
272717 2025-10-10 20:53:17 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 21:51:06.460 +03:35:08.51 2025-10-10 10:44:03.264 19.63 L-GOTO Other GOTO25ijf GOTO 2025TNSTR4056....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22428 2025-11-18 12:50:23 Jacob Wise Jacob Wise (LJMU), Steve Schulze (CIERA), Jesper Sollerman (OKC) ZTF SLSN-I 0.1745 1 1 ZTF Spectrum is well-fit to template spectra from previously classified SLSN-I, with a particularly good match to SN 2011ke. Redshift of z = 0.1745 from host galaxy H-alpha emission. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022). 2025TNSCR4642....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2025zsz_atrep_22428_ZTF.pdf NGSF fits 2025-11-18 12:50:23 Jacob Wise
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
22429 2025-11-16 22:23:54 NOT / ALFOSC Steve Schulze, Jesper Sollerman Steve Schulze ZTF tns_2025zsz_2025-11-16_22-23-54.311_NOT_ALFOSC_ZTF.ascii Object

Comments

TNS
System

Sat, 11/08/2025 - 10:56

Object coordinates updated

Object coordinates updated according to AT-report 276028 of Group ZTF
Previous RA, DEC: 21:51:06.454, +03:35:08.37 (327.776891429, +3.58565857143)
Updated RA, DEC: 21:51:06.439, +03:35:08.49 (327.776829, +3.5856914)

TNS
System

Thu, 10/23/2025 - 09:37

Object coordinates updated

Object coordinates updated according to AT-report 274369 of Group ATLAS
Previous RA, DEC: 21:51:06.460, +03:35:08.51 (327.776917, +3.585697)
Updated RA, DEC: 21:51:06.454, +03:35:08.37 (327.776891429, +3.58565857143)