RA/DEC (2000)
11:50:42.960 -13:23:17.72
177.6790006 -13.3882551
Type
SN IIn
Redshift
0.13
Discovery ReportClassification Report
Related AstroNotes: DRAFT-2506, 2026-127
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-04-18 07:31:08.999
TNS AT
Y
Public
Y
Discovery Mag
19.8965
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

 ▌SN_2026kco - 2026-05-07 05:58:51 ESO-NTT / EFOSC2-NTT (ePESSTO+)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

 ▌LAST_LAST-Cam_Clear
 ▌GOTO-S_GOTO-4_L
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-STH_ATLAS-03_orange
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌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
23655 2026-05-07 05:58:51 ESO-NTT / EFOSC2-NTT 780 Camila Cárdenas, Jasvinderjit Khaulsay W-Y. Lu，H-M. Chang,  P-Y. Wang,  M-H. Lee,  A. Sankar.K, A. Dutta, A. Aryan, Y.-H. Lee, T.-W. Chen ePESSTO+ tns_2026kco_2026-05-07_05-58-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026kco_2026-05-07_05-58-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2025-03-01 21:10:13 - 2026-06-04 17:57:09 2460736.38209 - 2461196.24802 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
588873 2026-06-04 17:57:09 2461196.24802 18.46 ABMag Clear- LAST_LAST-Cam 400
588872 2025-03-01 21:10:13 2460736.38209 21.42 ABMag Clear- LAST_LAST-Cam 6760 [Last non detection]
L-GOTO GOTO-S_GOTO-4 2026-04-16 11:18:27 - 2026-04-16 11:18:27 2461146.971155 - 2461146.971155 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579632 2026-04-16 11:18:27 2461146.971155 20.2 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2026-04-20 11:23:31 - 2026-04-20 11:23:31 2461150.97466 - 2461150.97466 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579633 2026-04-20 11:23:31 2461150.97466 20 0.19 ABMag L-GOTO GOTO-S_GOTO-3 135
orange-ATLAS ATLAS-STH_ATLAS-03 2026-04-23 20:53:18 - 2026-04-23 20:53:18 2461154.37035 - 2461154.37035 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577580 2026-04-23 20:53:18 2461154.37035 18.794 0.166 19.45 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot
cyan-ATLAS ATLAS-STH_ATLAS-03 2026-04-22 21:17:48 - 2026-04-22 21:17:48 2461153.38736 - 2461153.38736 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
577579 2026-04-22 21:17:48 2461153.38736 19.58 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2026-04-17 07:05:39 - 2026-04-17 07:05:39 2461147.7955903 - 2461147.7955903 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
576475 2026-04-17 07:05:39 2461147.7955903 20.3242 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-04-18 07:31:09 - 2026-04-20 07:02:41 2461148.8132986 - 2461150.7935301 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
576477 2026-04-20 07:02:41 2461150.7935301 19.7652 0.21018 ABMag g-ZTF P48_ZTF-Cam
576476 2026-04-18 07:31:09 2461148.8132986 19.8965 0.214848 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
307019 2026-06-04 19:03:37 LAST_Bot1 R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al. LAST LAST 11:50:42.935 -13:23:17.02 2026-06-04 17:57:08.928 18.46 Clear- PSN LAST N
302355 2026-05-05 16:06:58 GOTO_bot D. O'Neill, M. Pursiainen, K. Ackley et al. GOTO GOTO 11:50:42.950 -13:23:17.33 2026-04-20 11:23:30.624 20 L-GOTO PSN GOTO26edw GOTO N
301287 2026-04-24 08:37:53 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 11:50:42.983 -13:23:17.51 2026-04-23 20:53:18.240 18.794 orange-ATLAS PSN ATLAS26etd ATLAS N
300738 2026-04-20 07:42:46 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 11:50:42.960 -13:23:17.72 2026-04-18 07:31:08.999 19.8965 g-ZTF PSN ZTF26aatdpkc ZTF 2026TNSTR1737....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
23652 2026-05-07 15:50:29 ePESSTOplus_Bot1 Camila Cárdenas, Jasvinderjit Khaulsay, W-Y. Lu，H-M. Chang,  P-Y. Wang,  M-H. Lee,  A. Sankar.K, A. Dutta, A. Aryan, Y.-H. Lee, T.-W. Chen, O. Yaron on behalf of ePESSTO+ ePESSTO+ SN IIn 0.13 1 ePESSTO+ 2026TNSCR1980....1C
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
23655 2026-05-07 05:58:51 ESO-NTT / EFOSC2-NTT 780 Camila Cárdenas, Jasvinderjit Khaulsay W-Y. Lu，H-M. Chang,  P-Y. Wang,  M-H. Lee,  A. Sankar.K, A. Dutta, A. Aryan, Y.-H. Lee, T.-W. Chen ePESSTO+ tns_2026kco_2026-05-07_05-58-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026kco_2026-05-07_05-58-51_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

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