RA/DEC (2000)
09:54:32.050 -01:17:25.84
148.63354 -1.29051
Type
SN Ia
Redshift
0.02057
Discovery ReportClassification Report
Related AstroNotes: 2026-99
Reporting Group
ASAS-SN
Discovering Data Source
ASAS-SN
Discovery Date
2026-04-07 00:14:24.000
TNS AT
Y
Public
Y
Host Name
NGC 3047A
Host Redshift
0.020531
Discovery Mag
15.9
Filter
g-Sloan
Reporter/s
K. Z. Stanek, for the ASAS-SN team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026iur - 2026-04-09 12:00:00 ANU-2.3m / WiFeS (Supernova Alliance)z=
 ▌SN_2026iur - 2026-04-08 19:31:00 BL41 / FOSC-E5535 (None)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
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▌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
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▌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

 ▌ASASSN-3_Paczynski_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
23452 2026-04-09 12:00:00 ANU-2.3m / WiFeS 750 Robotic C. Lidman Supernova Alliance tns_2026iur_2026-04-09.5_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2026iur_2026-04-09.5_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object
23455 2026-04-08 19:31:00 BL41 / FOSC-E5535 4500 Claudio Balcon Claudio Balcon None tns_2026iur_2026-04-08_19-31-00_BL41_FOSC-E5535_None.dat tns_2026iur_2026-04-08_19-31-00_BL41_FOSC-E5535_None.fit Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-Sloan ASASSN-3_Paczynski 2026-03-28 00:00:00 - 2026-03-28 00:00:00 2461127.5 - 2461127.5 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
573359 2026-03-28 00:00:00 2461127.5 17.2 ABMag g-Sloan ASASSN-3_Paczynski [Last non detection]
g-Sloan ASASSN-2_Cassius 2026-04-07 00:14:24 - 2026-04-07 00:14:24 2461137.51 - 2461137.51 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
573360 2026-04-07 00:14:24 2461137.51 15.9 ABMag g-Sloan ASASSN-2_Cassius
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
299145 2026-04-07 20:19:58 Krzysztof Stanek K. Z. Stanek, for the ASAS-SN team ASAS-SN ASAS-SN 09:54:32.050 -01:17:25.84 2026-04-07 00:14:24.000 15.9 g-Sloan PSN NGC 3047A ASASSN-26cn ASAS-SN Present in multiple epochs, on the rise. Nuclear source, so could also be a TDE or AGN activity. 2026TNSTR1462....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
23453 2026-04-10 20:07:29 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None SN Ia 0.02057 1 2026TNSCR1530....1B
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
23455 2026-04-08 19:31:00 BL41 / FOSC-E5535 4500 Claudio Balcon Claudio Balcon None tns_2026iur_2026-04-08_19-31-00_BL41_FOSC-E5535_None.dat tns_2026iur_2026-04-08_19-31-00_BL41_FOSC-E5535_None.fit Object
23450 2026-04-09 22:28:37 Chris Lidman C. Lidman (ANU), B. P. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), B. Martin (ANU), A. Moller (Swinburne), L. Rauf (ANU), and B. E. Tucker (ANU) Supernova Alliance SN Ia 0.02057 1 Supernova Alliance Classified with superfit. SN99aa-like 2026TNSCR1511....1L
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
23452 2026-04-09 12:00:00 ANU-2.3m / WiFeS 750 Robotic C. Lidman Supernova Alliance tns_2026iur_2026-04-09.5_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2026iur_2026-04-09.5_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object

Comments