2026iur | Transient Name Server

RA/DEC (2000)

09:54:32.050 -01:17:25.84

148.63354 -1.29051

Type

SN Ia

Redshift

0.02057

Discovery Report Classification 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

Public

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

ASASSN-3_Paczynski_g

▌

ASASSN-2_Cassius_g

Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)

Spectra

Select	ID	Obs-date (UT)	Tel / Inst	Exp-Time	Observer/s	Reducer/s	Group	Spectrum ascii file	Spectrum fits file	Spec. Type
	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
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), 0 (observed) ▌Show H at z=v_exp= km/s ▌Show He at z=v_exp= km/s ▌Show He II at z=v_exp= km/s ▌Show C II at z=v_exp= km/s ▌Show C III at z=v_exp= km/s ▌Show C IV at z=v_exp= km/s ▌Show N II at z=v_exp= km/s ▌Show N III at z=v_exp= km/s ▌Show N IV at z=v_exp= km/s ▌Show N V at z=v_exp= km/s ▌Show O at z=v_exp= km/s ▌Show [O I] at z=v_exp= km/s ▌Show O II at z=v_exp= km/s ▌Show [O II] at z=v_exp= km/s ▌Show [O III] at z=v_exp= km/s ▌Show O V at z=v_exp= km/s ▌Show O VI at z=v_exp= km/s ▌Show Na at z=v_exp= km/s ▌Show Mg at z=v_exp= km/s ▌Show Mg II at z=v_exp= km/s ▌Show Si II at z=v_exp= km/s ▌Show S II at z=v_exp= km/s ▌Show Ca II at z=v_exp= km/s ▌Show [Ca II] at z=v_exp= km/s ▌Show Fe II at z=v_exp= km/s ▌Show Fe III at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Tellurics ▌Show Galaxy lines at z= ▌Show WR-WN at z=v_exp= km/s ▌Show WR-WC/O at z=v_exp= km/s 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
Binning factor: (rounded to nearest integer >1) Mouse hovers at WL: 0 (rest), 0 (observed) ▌Show H at z=v_exp= km/s ▌Show He at z=v_exp= km/s ▌Show He II at z=v_exp= km/s ▌Show C II at z=v_exp= km/s ▌Show C III at z=v_exp= km/s ▌Show C IV at z=v_exp= km/s ▌Show N II at z=v_exp= km/s ▌Show N III at z=v_exp= km/s ▌Show N IV at z=v_exp= km/s ▌Show N V at z=v_exp= km/s ▌Show O at z=v_exp= km/s ▌Show [O I] at z=v_exp= km/s ▌Show O II at z=v_exp= km/s ▌Show [O II] at z=v_exp= km/s ▌Show [O III] at z=v_exp= km/s ▌Show O V at z=v_exp= km/s ▌Show O VI at z=v_exp= km/s ▌Show Na at z=v_exp= km/s ▌Show Mg at z=v_exp= km/s ▌Show Mg II at z=v_exp= km/s ▌Show Si II at z=v_exp= km/s ▌Show S II at z=v_exp= km/s ▌Show Ca II at z=v_exp= km/s ▌Show [Ca II] at z=v_exp= km/s ▌Show Fe II at z=v_exp= km/s ▌Show Fe III at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Å at z=v_exp= km/s ▌Show Tellurics ▌Show Galaxy lines at z= ▌Show WR-WN at z=v_exp= km/s ▌Show WR-WC/O at z=v_exp= km/s Remarks

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

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

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

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

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

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

SN 2026iur

Spectra

Light curves

Comments