2026iu | Transient Name Server

RA/DEC (2000)

15:57:58.517 +02:48:10.90

239.4938188 +2.8030273

Type

SN Ia

Redshift

0.047589667

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2026-01-09 12:38:00.000

TNS AT

Public

Discovery Mag

17.5491

Filter

r-ZTF

Reporter/s

Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

P48_ZTF-Cam_r

▌

P48_ZTF-Cam_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	Spec. Type	Remarks
	22837	2026-01-19 11:25:19	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2026iu_2026-01-19_11-25-19.256775_P60_SEDM_ZTF.ascii	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
	22821	2026-01-18 14:01:48	Lick-3m / KAST	1200	Kyle Davis (UCSC)	Kyle Davis (UCSC)	UCSC	tns_2026iu_2026-01-18_14-01-48.01_Lick-3m_KAST_UCSC.flm	Object	We measure a Si II 6355 absorption velocity of -10,300 km/s.
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 We measure a Si II 6355 absorption velocity of -10,300 km/s.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

r-ZTF

P48_ZTF-Cam

2025-12-19 13:52:41 - 2026-01-09 12:38:00

2461029.0782523 - 2461050.0263889

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
547939	2026-01-09 12:38:00	2461050.0263889	17.5491	0.0751743		ABMag	r-ZTF	P48_ZTF-Cam
547938	2025-12-19 13:52:41	2461029.0782523			18.0848	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2026-01-09 13:33:58 - 2026-01-09 13:33:58

2461050.0652546 - 2461050.0652546

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
547940	2026-01-09 13:33:58	2461050.0652546	17.5955	0.132141		ABMag	g-ZTF	P48_ZTF-Cam

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
286188	2026-01-09 13:47:30	BTSbot_bot	Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al.	ZTF	ZTF	15:57:58.517	+02:48:10.90	2026-01-09 12:38:00.000	17.5491	r-ZTF		PSN		ZTF26aaadpbv	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).	2026TNSTR..85....1R	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22836

2026-01-21 23:13:56

ZTF_Bot1

C. Fremling, D. Neill, Y. Sharma on behalf of the SEDM Team (Caltech) and the Zwicky Transient Facility (ZTF) based on SNIascore

ZTF

SN Ia

0.047589667

ZTF

2026TNSCR.281....1F

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
22837	2026-01-19 11:25:19	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2026iu_2026-01-19_11-25-19.256775_P60_SEDM_ZTF.ascii		Object

22820

2026-01-20 18:04:52

Kyle Davis

Kyle Davis (UCSC), Ryan Foley (UCSC)

UCSC

SN Ia

0.048

UCSC, YSE

2026TNSCR.258....1D

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
22821	2026-01-18 14:01:48	Lick-3m / KAST	1200	Kyle Davis (UCSC)	Kyle Davis (UCSC)	UCSC	tns_2026iu_2026-01-18_14-01-48.01_Lick-3m_KAST_UCSC.flm		Object			We measure a Si II 6355 absorption velocity of -10,300 km/s.

SN 2026iu

Spectra

Light curves

Comments