RA/DEC (2000)
00:21:27.503 -25:16:36.49
5.3645942059154 -25.27680198744
Type
SN IIn
Redshift
0.126
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-07-20 17:22:56.928
TNS AT
Y
Public
Y
Discovery Mag
18.82
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, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

Spectra

 ▌SN_2026vfd - 2026-07-23 13:51:56 UH88 / SNIFS (SCAT)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
z-step:   v-step: 
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌GOTO-S_GOTO-4_L
 ▌PS2_GPC2_r
 ▌P48_ZTF-Cam_r
 ▌ATLAS-HKO_ATLAS-02_cyan
 ▌PS1_GPC1_w
   
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
24361 2026-07-23 13:51:56 UH88 / SNIFS 1500 Hinkle SCAT tns_2026vfd_2026-07-23_13-51-56_UH88_SNIFS_SCAT.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-07-04 18:12:02 - 2026-07-20 17:22:57 2461226.258362 - 2461242.224266 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
605525 2026-07-20 17:22:57 2461242.224266 18.82 0.06 ABMag L-GOTO GOTO-S_GOTO-4 180
605524 2026-07-04 18:12:02 2461226.258362 19.3 ABMag L-GOTO GOTO-S_GOTO-4 135 [Last non detection]
r-P1 PS2_GPC2 2026-07-19 13:51:20 - 2026-07-19 13:51:20 2461241.07731 - 2461241.07731 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
607244 2026-07-19 13:51:20 2461241.07731 18.98 0.11 20.6 ABMag r-P1 PS2_GPC2 27 Robot
r-ZTF P48_ZTF-Cam 2026-08-05 10:31:10 - 2026-09-01 09:31:38 2461257.9383102 - 2461284.8969676 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
615776 2026-09-01 09:31:38 2461284.8969676 18.064 0.0869552 ABMag r-ZTF P48_ZTF-Cam
615775 2026-08-05 10:31:10 2461257.9383102 18.1173 0.0827639 ABMag r-ZTF P48_ZTF-Cam
cyan-ATLAS ATLAS-HKO_ATLAS-02 2026-07-18 12:56:23 - 2026-07-19 12:44:45 2461240.03916 - 2461241.03108 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
605810 2026-07-19 12:44:45 2461241.03108 18.796 0.099 19.47 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
605809 2026-07-18 12:56:23 2461240.03916 19.34 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
w-P1 PS1_GPC1 2026-09-05 11:11:45 - 2026-09-05 11:11:45 2461288.96649 - 2461288.96649 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
622188 2026-09-05 11:11:45 2461288.96649 18.18 0.01 22 ABMag w-P1 PS1_GPC1 45 Robot
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
325321 2026-09-26 22:38:52 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 00:21:27.503 -25:16:36.49 2026-09-05 11:11:44.736 18.18 w-P1 PSN PS26fut Pan-STARRS N
321934 2026-09-01 18:23:28 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 00:21:27.499 -25:16:36.54 2026-08-05 10:31:10.001 18.1173 r-ZTF PSN ZTF26abmauno ZTF N
317060 2026-07-24 19:18:38 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 00:21:27.504 -25:16:36.50 2026-07-19 13:51:19.584 18.98 r-P1 PSN PS26fut Pan-STARRS N
316188 2026-07-21 09:03:42 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 00:21:27.497 -25:16:36.24 2026-07-19 12:44:45.312 18.796 cyan-ATLAS PSN ATLAS26ivx ATLAS N
315978 2026-07-20 18:53:32 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 00:21:27.491 -25:16:36.50 2026-07-20 17:22:56.928 18.82 L-GOTO Other GOTO26gzv GOTO 2026TNSTR2980....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
24354 2026-07-23 14:57:01 Jason Hinkle Jason Hinkle (UIUC) on behalf of SCAT SCAT SN IIn 0.126 1 SCAT Blue continuum with prominent H emission and weaker He I emission. SNID-SAGE (Stoppa & Smartt 2026) also gives good matches to Ia-CSM events. Given the lack of clear absorption features, we favor a IIn classification.
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
24361 2026-07-23 13:51:56 UH88 / SNIFS 1500 Hinkle SCAT tns_2026vfd_2026-07-23_13-51-56_UH88_SNIFS_SCAT.txt Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 325321 of Group Pan-STARRS
Previous RA, DEC: 00:21:27.504, -25:16:36.50 (5.36460171351, -25.2768050196)
Updated RA, DEC: 00:21:27.503, -25:16:36.49 (5.3645942059154, -25.27680198744)

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 317060 of Group Pan-STARRS
Previous RA, DEC: 00:21:27.497, -25:16:36.24 (5.36457166667, -25.2767322222)
Updated RA, DEC: 00:21:27.504, -25:16:36.50 (5.36460171351, -25.2768050196)

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 316188 of Group ATLAS
Previous RA, DEC: 00:21:27.491, -25:16:36.50 (5.364546, -25.276806)
Updated RA, DEC: 00:21:27.497, -25:16:36.24 (5.36457166667, -25.2767322222)