2026knt | Transient Name Server

RA/DEC (2000)

13:23:31.702 -27:27:16.87

200.8820915 -27.4546868

Type

SN Ia

Redshift

0.0443

Discovery Report Classification Report

Reporting Group

GOTO

Discovering Data Source

GOTO

Discovery Date

2026-04-21 10:45:33.120

TNS AT

Y

Public

Y

Discovery Mag

19.6

Filter

L-GOTO

Reporter/s

G. Ramsay, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

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	Assoc. Groups	End prop. period	Remarks
	23800	2026-05-20 22:52:23	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh	Jacob Wise	ZTF	tns_2026knt_2026-05-20_22-52-23.078_LT_SPRAT_ZTF.spec		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

L-GOTO

GOTO-S_GOTO-4

2026-04-15 11:55:00 - 2026-04-15 11:55:00

2461145.996526 - 2461145.996526

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577516	2026-04-15 11:55:00	2461145.996526			20.4	ABMag	L-GOTO	GOTO-S_GOTO-4	180		[Last non detection]

L-GOTO

GOTO-S_GOTO-3

2026-04-21 10:45:33 - 2026-04-21 10:45:33

2461151.948301 - 2461151.948301

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577517	2026-04-21 10:45:33	2461151.948301	19.6	0.11		ABMag	L-GOTO	GOTO-S_GOTO-3	180

orange-ATLAS

ATLAS-CHL_ATLAS-04

2026-05-06 04:26:59 - 2026-05-06 04:26:59

2461166.68541 - 2461166.68541

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
579846	2026-05-06 04:26:59	2461166.68541	17.805	0.084	19.13	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot

r-ZTF

P48_ZTF-Cam

2026-04-21 08:43:41 - 2026-04-21 08:43:41

2461151.863669 - 2461151.863669

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577810	2026-04-21 08:43:41	2461151.863669	19.1199	0.112948		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2026-04-18 08:00:06 - 2026-04-25 07:28:12

2461148.8334028 - 2461155.81125

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577811	2026-04-25 07:28:12	2461155.81125	18.334	0.0997309		ABMag	g-ZTF	P48_ZTF-Cam
577809	2026-04-18 08:00:06	2461148.8334028			20.2097	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2026-05-05 10:45:05 - 2026-05-05 10:45:05

2461165.94797 - 2461165.94797

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
579845	2026-05-05 10:45:05	2461165.94797			18.58	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[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
302470	2026-05-06 12:57:06	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	13:23:31.745	-27:27:16.77	2026-05-06 04:26:59.424	17.805	orange-ATLAS		PSN		ATLAS26fer	ATLAS				N
301398	2026-04-25 09:22:44	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	13:23:31.702	-27:27:16.87	2026-04-21 08:43:41.001	19.1199	r-ZTF		PSN		ZTF26aaubezw	ZTF				N
301260	2026-04-23 22:51:16	GOTO_bot	G. Ramsay, D. O'Neill, K. Ackley et al.	GOTO	GOTO	13:23:31.653	-27:27:17.47	2026-04-21 10:45:33.120	19.6	L-GOTO		Other		GOTO26dpr	GOTO			2026TNSTR1780....1R	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

23796

2026-05-21 16:01:42

Jacob Wise

Jacob Wise (LJMU), Daniel Perley (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Yogesh Wagh (LJMU), K-Ryan Hinds (Caltech)

ZTF

SN Ia

0.0443

1

2

ZTF

Spectrum is well-fit to template spectra from previously classified SNe Ia post-peak. Redshift of z = 0.0443 ± 0.0010 from weak Na D absorption. Allowing the redshift to vary freely in the template fitting, we find a redshift of z = 0.045 ± 0.004, which we take as confirmation of the former's validity. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2026TNSCR2220....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2026knt_atrep_23796_ZTF.pdf	NGSF fits (fixed at z = 0.0443)	2026-05-21 16:01:42	Jacob Wise
tns_2026knt_atrep_23796_ZTF_0.pdf	NGSF fits (redshift as free parameter)	2026-05-21 16:01:42	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
23800	2026-05-20 22:52:23	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Yogesh Wagh	Jacob Wise	ZTF	tns_2026knt_2026-05-20_22-52-23.078_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 301398 of Group ZTF
Previous RA, DEC: 13:23:31.653, -27:27:17.47 (200.881886, -27.454852)
Updated RA, DEC: 13:23:31.702, -27:27:16.87 (200.8820915, -27.4546868)

Log in or register to post comments

Log in or register to post comments