RA/DEC (2000)
20:23:03.796 +09:32:45.95
305.7658184 +9.5460976
Type
SN II
Redshift
0.0225
Discovery ReportClassification Report
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2026-03-22 12:41:06.996
TNS AT
Y
Public
Y
Discovery Mag
19.237
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_2026hag - 2026-04-20 11:12:31 FLWO-1.5m / FAST (VHU-TDA)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
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌ATLAS-HKO_ATLAS-02_cyan
   
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
23523 2026-04-20 11:12:31 FLWO-1.5m / FAST Harvard Anya Nugent, Yize Dong VHU-TDA tns_2026hag_2026-04-20_11-12-31.000_FLWO-1.5m_FAST_VHU-TDA.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2026-04-01 05:17:23 - 2026-04-03 04:55:49 2461131.720405 - 2461133.705431 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
572012 2026-04-03 04:55:49 2461133.705431 18.28 0.16 ABMag L-GOTO GOTO-N_GOTO-2 180
572011 2026-04-01 05:17:23 2461131.720405 17.8 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-10-14 00:29:00 - 2026-04-28 08:00:04 2460962.5201389 - 2461158.8333796 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
578597 2026-04-28 08:00:04 2461158.8333796 18.91 0.09 19.77 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
578596 2025-10-14 00:29:00 2460962.5201389 20.13 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
r-ZTF P48_ZTF-Cam 2026-03-21 12:41:54 - 2026-03-22 12:41:07 2461121.0290972 - 2461122.0285532 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
569474 2026-03-22 12:41:07 2461122.0285532 19.237 0.129009 ABMag r-ZTF P48_ZTF-Cam
569473 2026-03-21 12:41:54 2461121.0290972 20.4928 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-03-23 12:22:02 - 2026-03-23 12:22:02 2461123.0153009 - 2461123.0153009 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
569475 2026-03-23 12:22:02 2461123.0153009 18.4414 0.0711873 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-12-06 05:57:49 - 2025-12-06 05:57:49 2461015.74848 - 2461015.74848 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
570383 2025-12-06 05:57:49 2461015.74848 18.18 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
cyan-ATLAS ATLAS-HKO_ATLAS-02 2026-03-26 14:26:36 - 2026-03-26 14:26:36 2461126.10181 - 2461126.10181 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
570384 2026-03-26 14:26:36 2461126.10181 18.193 0.085 19.26 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 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
301812 2026-04-28 10:07:04 BlackGEM_Bot1 P. Groot, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 20:23:03.829 +09:32:46.31 2026-04-28 08:00:04.000 18.91 BG-q-BlackGem PSN BGEM J202303.83+093246.3 BlackGEM N
298360 2026-04-04 10:20:43 GOTO_bot D. O'Neill, G. Ramsay, K. Ackley et al. GOTO GOTO 20:23:03.849 +09:32:45.79 2026-04-03 04:55:49.152 18.28 L-GOTO Other GOTO26cse GOTO N
297487 2026-03-27 01:23:00 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 20:23:03.792 +09:32:46.29 2026-03-26 14:26:36.384 18.193 cyan-ATLAS PSN ATLAS26djh ATLAS N
297077 2026-03-23 12:46:57 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 20:23:03.796 +09:32:45.95 2026-03-22 12:41:06.996 19.237 r-ZTF PSN ZTF26aaoqrxr ZTF 2026TNSTR1251....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
23520 2026-04-20 11:31:24 Anya Nugent Anya Nugent (Harvard/CfA), Yize Dong (Harvard/CfA), S. Karthik Yadavalli (Harvard/CfA), V. Ashley Villar (Harvard/CfA), Kaylee de Soto (Harvard/CfA), Danielle Frostig(Harvard/CfA), Edo Berger (Harvard/CfA), Wasundara Athukoralalage (Harvard/CfA), Will Golay (Harvard/CfA), Daichi Hiramatsu (Harvard/CfA), Yuyang Chen (Harvard/CfA) VHU-TDA SN II 0.0225 1 VHU-TDA Redshift from detection of host H-alpha. Classification of SN II/IIn from SNID-SAGE. 2026TNSCR1739....1N
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
23523 2026-04-20 11:12:31 FLWO-1.5m / FAST Harvard Anya Nugent, Yize Dong VHU-TDA tns_2026hag_2026-04-20_11-12-31.000_FLWO-1.5m_FAST_VHU-TDA.ascii Object

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