RA/DEC (2000)
19:22:43.979 -14:49:08.19
290.6832441 -14.8189421
Type
SN Ib-pec
Redshift
0.0535
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-03-12 12:49:47.003
TNS AT
Y
Public
Y
Discovery Mag
19.9491
Filter
r-ZTF
Reporter/s
Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026fxs - 2026-05-13 03:09:34 LT / SPRAT (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

 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌P48_ZTF-Cam_r
   
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
23704 2026-05-13 03:09:34 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh Jacob Wise ZTF tns_2026fxs_2026-05-13_03-09-33.802_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-10-05 10:55:28 - 2026-03-24 17:57:57 2460953.95519 - 2461124.248576 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
570137 2026-03-24 17:57:57 2461124.248576 18.2 0.05 ABMag L-GOTO GOTO-S_GOTO-3 135
570136 2025-10-05 10:55:28 2460953.95519 19.1 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-03-14 09:33:26 - 2026-03-14 09:33:26 2461113.89822 - 2461113.89822 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
570789 2026-03-14 09:33:26 2461113.89822 18.08 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2026-03-17 08:51:25 - 2026-03-17 08:51:25 2461116.86904 - 2461116.86904 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
570790 2026-03-17 08:51:25 2461116.86904 18.598 0.163 18.78 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-10-12 00:10:27 - 2026-03-30 09:13:46 2460960.5072569 - 2461129.8845602 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
571951 2026-03-30 09:13:46 2461129.8845602 18.16 0.03 20.85 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
571950 2025-10-12 00:10:27 2460960.5072569 20.61 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
r-ZTF P48_ZTF-Cam 2026-03-11 12:49:40 - 2026-03-18 12:40:07 2461111.0344907 - 2461118.0278588 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
565822 2026-03-18 12:40:07 2461118.0278588 18.7021 0.0748542 ABMag r-ZTF P48_ZTF-Cam
565821 2026-03-12 12:49:47 2461112.0345718 19.9491 0.15668 ABMag r-ZTF P48_ZTF-Cam
565820 2026-03-11 12:49:40 2461111.0344907 19.2415 ABMag r-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
298332 2026-04-03 11:52:02 BlackGEM_Bot1 H. Tranin, F. Stoppa, D. Pieterse et al. BlackGEM BlackGEM 19:22:43.971 -14:49:08.16 2026-03-30 09:13:46.000 18.16 BG-q-BlackGem PSN BGEM J192243.97-144908.2 BlackGEM N
297668 2026-03-28 19:24:18 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 19:22:43.948 -14:49:07.77 2026-03-17 08:51:25.056 18.598 cyan-ATLAS PSN ATLAS26dmu ATLAS N
297378 2026-03-25 18:09:00 GOTO_bot G. Ramsay, K. Ackley, M. Dyer et al. GOTO GOTO 19:22:43.951 -14:49:07.51 2026-03-24 17:57:57.312 18.2 L-GOTO Other GOTO26cju GOTO N
294981 2026-03-18 17:56:30 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 19:22:43.979 -14:49:08.19 2026-03-12 12:49:47.003 19.9491 r-ZTF PSN ZTF26aamcbyy ZTF 2026TNSTR1165....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
23701 2026-05-13 12:50:43 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), Yang Hu (OKC), Steve Schulze (Northwestern), Ragnhild Lunnan (OKC), Jesper Sollerman (OKC), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Yogesh Wagh (LJMU), K-Ryan Hinds (Caltech) ZTF SN Ib-pec 0.0535 1 2 ZTF Spectrum is fit to a variety of SN Ia, Ib and Ic templates. However, the most convincing matches are to spectra from previously classified SN Ib and SLSN-Ib. Considering the event's ~45 day rise to peak, and peak absolute magnitude of M ~ -20, we classify it as a SN Ib-pec. Redshift of z = 0.0535 ± 0.0055 from template matches. Classification performed using Next Generation Superfit (NGSF; Goldwasser et al. 2022) and SNID-SAGE (Stoppa & Smartt 2026). 2026TNSCR2092....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2026fxs_atrep_23701_ZTF.pdf NGSF fits 2026-05-13 12:50:43 Jacob Wise
tns_2026fxs_atrep_23701_ZTF_0.pdf SNID-SAGE fits 2026-05-13 12:50:43 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
23704 2026-05-13 03:09:34 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh Jacob Wise ZTF tns_2026fxs_2026-05-13_03-09-33.802_LT_SPRAT_ZTF.spec Object

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