RA/DEC (2000)
12:27:26.849 -08:19:32.24
186.8618725 -8.3256225
Type
SN II
Redshift
0.01795
Discovery ReportClassification Report
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2025-08-06 23:31:12.000
TNS AT
Y
Public
Y
Host Name
MRK 1327
Host Redshift
0.01024
Discovery Mag
16.3
Filter
g-Sloan
Reporter/s
K. Z. Stanek, J. Callahan, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025tiz - 2026-01-05 00:00:00 ANU-2.3m / WiFeS (Supernova Alliance)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

 ▌ATLAS-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_cyan
 ▌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
22736 2026-01-05 00:00:00 ANU-2.3m / WiFeS B. P. Schmidt (ANU) L. Rauf (ANU) Supernova Alliance tns_2025tiz_2026-01-05_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2025tiz_2026-01-05_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object Fit with superfit.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-12-01 15:06:12 - 2025-12-01 15:06:12 2461011.12931 - 2461011.12931 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535711 2025-12-01 15:06:12 2461011.12931 18.764 0.169 19.27 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
cyan-ATLAS ATLAS-HKO_ATLAS-02 2025-11-27 15:35:56 - 2025-11-27 15:35:56 2461007.14995 - 2461007.14995 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535710 2025-11-27 15:35:56 2461007.14995 18.89 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [Last non detection]
g-Sloan ASASSN-2_Cassius 2025-07-28 00:00:00 - 2025-08-06 23:31:12 2460884.5 - 2460894.48 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507783 2025-08-06 23:31:12 2460894.48 16.3 ABMag g-Sloan ASASSN-2_Cassius
507782 2025-07-28 00:00:00 2460884.5 18.1 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
279199 2025-12-02 09:47:32 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland (IfA et al. ATLAS ATLAS 12:27:26.849 -08:19:32.24 2025-12-01 15:06:12.384 18.764 orange-ATLAS PSN ATLAS25pgd ATLAS N
265219 2025-08-07 15:35:09 Krzysztof Stanek K. Z. Stanek,J. Callahan,for the ASAS-SN team et al. ASAS-SN ASAS-SN 12:27:26.897 -08:19:32.92 2025-08-06 23:31:12.000 16.3 g-Sloan PSN MRK 1327 ASASSN-25di ASAS-SN Present in two epochs, on the rise 2025TNSTR3101....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
22735 2026-01-06 11:19:02 Liana Rauf L. Rauf (ANU), B. P. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), P. Armstrong (ANU), D. Cao (ANU), C. Lidman (ANU), B. Martin (ANU), J. Shi (University of Melbourne), and B. E. Tucker (ANU) Supernova Alliance SN II 0.01795 1 Supernova Alliance Nebular Phase SN II based on broad Halpha. 2026TNSCR..45....1R
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
22736 2026-01-05 00:00:00 ANU-2.3m / WiFeS B. P. Schmidt (ANU) L. Rauf (ANU) Supernova Alliance tns_2025tiz_2026-01-05_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2025tiz_2026-01-05_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object Fit with superfit.

Comments

TNS
System

Tue, 12/02/2025 - 09:47

Object coordinates updated

Object coordinates updated according to AT-report 279199 of Group ATLAS
Previous RA, DEC: 12:27:26.897, -08:19:32.92 (186.86207, -8.32581)
Updated RA, DEC: 12:27:26.849, -08:19:32.24 (186.8618725, -8.3256225)