2025xej | Transient Name Server

RA/DEC (2000)

20:19:29.796 -22:34:06.67

304.874151936 -22.5685203471

Type

SN Ia

Redshift

0.0778

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-09-09 05:06:28.002

TNS AT

Y

Public

Y

Discovery Mag

19.6471

Filter

r-ZTF

Reporter/s

Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF

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
	22266	2025-10-17 04:39:48	Lick-3m / KAST		R. Michael Rich, Zoe McGrath, Aleksandra Bochenek, Ava Huddleston, Ethan Cotta	Jacob Wise	ZTF	tns_2025xej_2025-10-17_04-39-48.41_Lick-3m_KAST_ZTF.txt		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

2025-09-03 13:01:29 - 2025-09-03 13:01:29

2460922.042696 - 2460922.042696

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
517653	2025-09-03 13:01:29	2460922.042696			18.3	ABMag	L-GOTO	GOTO-S_GOTO-4	180		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-09-15 21:35:00 - 2025-09-15 21:35:00

2460934.3993 - 2460934.3993

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
517654	2025-09-15 21:35:00	2460934.3993	18.63	0.07		ABMag	L-GOTO	GOTO-N_GOTO-2	180

orange-ATLAS

ATLAS-STH_ATLAS-03

2025-09-10 21:17:00 - 2025-09-13 20:03:15

2460929.38681 - 2460932.33559

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
517060	2025-09-13 20:03:15	2460932.33559	18.961	0.14	19.41	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot
517059	2025-09-10 21:17:00	2460929.38681			18.79	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot	[Last non detection]

i-ZTF

P48_ZTF-Cam

2025-09-09 04:05:35 - 2025-09-09 04:05:35

2460927.670544 - 2460927.670544

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516289	2025-09-09 04:05:35	2460927.670544			19.6397	ABMag	i-ZTF	P48_ZTF-Cam			[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-09-09 05:06:28 - 2025-09-09 05:06:28

2460927.7128241 - 2460927.7128241

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516290	2025-09-09 05:06:28	2460927.7128241	19.6471	0.188841		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-09-10 04:11:47 - 2025-09-10 04:11:47

2460928.6748495 - 2460928.6748495

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516291	2025-09-10 04:11:47	2460928.6748495	19.3105	0.198281		ABMag	g-ZTF	P48_ZTF-Cam

w-P1

PS1_GPC1

2025-09-15 07:29:12 - 2025-09-15 07:29:12

2460933.81194 - 2460933.81194

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
545865	2025-09-15 07:29:12	2460933.81194	18.86	0.03	22	ABMag	w-P1	PS1_GPC1	60	Robot

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
284618	2025-12-31 00:24:45	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	20:19:29.796	-22:34:06.67	2025-09-15 07:29:11.616	18.86	w-P1		PSN		PS25lgp	Pan-STARRS				N
270288	2025-09-16 07:19:07	GOTO_bot	G. Ramsay, K. Ackley, M. Dyer et al.	GOTO	GOTO	20:19:29.794	-22:34:06.83	2025-09-15 21:34:59.520	18.63	L-GOTO		Other		GOTO25hdf	GOTO				N
270003	2025-09-14 18:25:55	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	20:19:29.782	-22:34:06.82	2025-09-13 20:03:14.976	18.961	orange-ATLAS		PSN		ATLAS25lgu	ATLAS				N
269618	2025-09-10 15:24:58	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	20:19:29.771	-22:34:07.15	2025-09-09 05:06:28.002	19.6471	r-ZTF		PSN		ZTF25abptfih	ZTF			2025TNSTR3643....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

22266

2025-10-22 02:08:51

Jacob Wise

Jacob Wise (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Daniel Perley (LJMU), R. Michael Rich (UCLA), Ava Huddleston (UCLA), Ethan Cotta (UCLA)

ZTF

SN Ia

0.0778

1

1

ZTF

Spectrum is reasonably fit by template spectra from previously classified SNe Ia. Redshift of 0.0778 obtained from narrow host galaxy H-alpha emission. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR4249....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025xej_atrep_22266_ZTF.pdf	NGSF fits	2025-10-22 02:08:52	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
22266	2025-10-17 04:39:48	Lick-3m / KAST		R. Michael Rich, Zoe McGrath, Aleksandra Bochenek, Ava Huddleston, Ethan Cotta	Jacob Wise	ZTF	tns_2025xej_2025-10-17_04-39-48.41_Lick-3m_KAST_ZTF.txt		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 284618 of Group Pan-STARRS
Previous RA, DEC: 20:19:29.771, -22:34:07.15 (304.8740453, -22.5686533)
Updated RA, DEC: 20:19:29.796, -22:34:06.67 (304.874151936, -22.5685203471)

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