RA/DEC (2000)
03:27:39.869 -04:15:30.22
51.91612 -4.2583933
Type
SN Ia
Redshift
0.021
Discovery ReportClassification Report
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2025-06-18 10:04:48.000
TNS AT
Y
Public
Y
Host Name
WISEA J032739.88-041530.5
Host Redshift
0.037609
Discovery Mag
15.8
Filter
g-Sloan
Reporter/s
K. Z. Stanek, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025nzh - 2025-10-17 11:11:58 Lick-3m / KAST (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-4_L
 ▌GOTO-N_GOTO-2_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌P48_ZTF-Cam_g
 ▌ASASSN-2_Cassius_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
22265 2025-10-17 11:11:58 Lick-3m / KAST R. Michael Rich, Zoe McGrath, Aleksandra Bochenek, Ava Huddleston, Ethan Cotta Jacob Wise ZTF tns_2025nzh_2025-10-17_11-11-57.75_Lick-3m_KAST_ZTF.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-07-13 19:20:24 - 2025-07-13 19:20:24 2460870.305827 - 2460870.305827 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503101 2025-07-13 19:20:24 2460870.305827 16.63 0.03 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-N_GOTO-2 2025-02-03 22:05:55 - 2025-02-03 22:05:55 2460710.420774 - 2460710.420774 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503100 2025-02-03 22:05:55 2460710.420774 19.3 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-07-03 10:06:32 - 2025-07-03 10:06:32 2460859.9212 - 2460859.9212 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
500769 2025-07-03 10:06:32 2460859.9212 16.288 0.035 18.78 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-03-21 00:34:47 - 2025-03-21 00:34:47 2460755.52416 - 2460755.52416 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
500768 2025-03-21 00:34:47 2460755.52416 18.68 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-08-26 06:51:31 - 2025-08-26 06:51:31 2460913.7857755 - 2460913.7857755 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
517775 2025-08-26 06:51:31 2460913.7857755 18.35 0.07 21.05 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-01-21 00:57:27 - 2025-01-21 00:57:27 2460696.5398958 - 2460696.5398958 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
517774 2025-01-21 00:57:27 2460696.5398958 20.69 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
g-ZTF P48_ZTF-Cam 2025-07-30 11:29:01 - 2025-08-15 10:37:48 2460886.9784838 - 2460902.9429167 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508982 2025-08-15 10:37:48 2460902.9429167 18.5395 0.107817 ABMag g-ZTF P48_ZTF-Cam
508981 2025-07-30 11:29:01 2460886.9784838 18.1713 0.073118 ABMag g-ZTF P48_ZTF-Cam
g-Sloan ASASSN-2_Cassius 2025-03-09 00:00:00 - 2025-06-18 10:04:48 2460743.5 - 2460844.92 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496165 2025-06-18 10:04:48 2460844.92 15.8 ABMag g-Sloan ASASSN-2_Cassius
496164 2025-03-09 00:00:00 2460743.5 17.3 ABMag g-Sloan ASASSN-2_Cassius [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
270345 2025-09-16 17:24:28 BlackGEM_Bot1 H. Tranin,F. Stoppa,D. Pieterse et al. BlackGEM BlackGEM 03:27:39.893 -04:15:30.37 2025-08-26 06:51:31.000 18.35 BG-q-BlackGem PSN BGEM J032739.89-041530.4 BlackGEM N
265928 2025-08-15 10:50:04 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 03:27:39.869 -04:15:30.22 2025-07-30 11:29:01.000 18.1713 g-ZTF PSN ZTF19adfuzrc ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). N
262815 2025-07-17 10:33:29 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 03:27:39.883 -04:15:30.16 2025-07-13 19:20:23.712 16.63 L-GOTO Other GOTO25evv GOTO N
261487 2025-07-04 13:05:28 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 03:27:39.871 -04:15:30.29 2025-07-03 10:06:31.680 16.288 orange-ATLAS PSN ATLAS25gxy ATLAS N
259048 2025-06-18 13:29:13 Krzysztof Stanek K. Z. Stanek,for the ASAS-SN team et al. ASAS-SN ASAS-SN 03:27:39.888 -04:15:29.02 2025-06-18 10:04:48.000 15.8 g-Sloan PSN WISEA J032739.88-041530.5 ASASSN-25co ASAS-SN Likely supernova, present in several epochs, discovered after the seasonal break 2025TNSTR2268....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
22265 2025-10-22 02:01:30 Jacob Wise Jacob Wise (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Daniel Perley (LJMU), R. Michael Rich (UCLA), Ava Huddleston (UCLA), Ethan Cotta (UCLA) ZTF SN Ia 0.021 1 1 ZTF Spectrum is well-fit to template spectra from previously classified SN Ia events well-past peak. Redshift of z = 0.021 from host galaxy emission lines in spectrum. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022). 2025TNSCR4249....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2025nzh_atrep_22265_ZTF.pdf NGSF fits 2025-10-22 02:01:30 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
22265 2025-10-17 11:11:58 Lick-3m / KAST R. Michael Rich, Zoe McGrath, Aleksandra Bochenek, Ava Huddleston, Ethan Cotta Jacob Wise ZTF tns_2025nzh_2025-10-17_11-11-57.75_Lick-3m_KAST_ZTF.txt Object

Comments

TNS
System

Fri, 08/15/2025 - 10:50

Object coordinates updated

Object coordinates updated according to AT-report 265928 of Group ZTF
Previous RA, DEC: 03:27:39.871, -04:15:30.29 (51.91613, -4.258415)
Updated RA, DEC: 03:27:39.869, -04:15:30.22 (51.91612, -4.2583933)

TNS
System

Fri, 07/04/2025 - 13:05

Object coordinates updated

Object coordinates updated according to AT-report 261487 of Group ATLAS
Previous RA, DEC: 03:27:39.888, -04:15:29.02 (51.9162, -4.25806)
Updated RA, DEC: 03:27:39.871, -04:15:30.29 (51.91613, -4.258415)