2025xju | Transient Name Server

RA/DEC (2000)

23:55:14.677 +39:45:49.34

358.81115369167 +39.763704941667

Type

SN Ia-SC

Redshift

0.04

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-09-14 05:47:57.998

TNS AT

Y

Public

Y

Discovery Mag

18.5746

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

▌

GOTO-N_GOTO-2_L

▌

P48_ZTF-Cam_r

▌

P48_ZTF-Cam_g

▌

ATLAS-HKO_ATLAS-02_orange

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
	22128	2025-09-30 04:36:44	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025xju_2025-09-30_04-36-44.459_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
	22070	2025-09-21 21:16:10	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025xju_2025-09-21_21-16-10.095_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-N_GOTO-2

2025-09-11 23:20:40 - 2025-09-12 23:51:06

2460930.472688 - 2460931.49382

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516904	2025-09-12 23:51:06	2460931.49382	19.07	0.2		ABMag	L-GOTO	GOTO-N_GOTO-2	180
516903	2025-09-11 23:20:40	2460930.472688			19.2	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-09-14 05:47:58 - 2025-09-14 05:47:58

2460932.7416435 - 2460932.7416435

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516842	2025-09-14 05:47:58	2460932.7416435	18.5746	0.0726096		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-09-09 08:50:52 - 2025-09-14 07:25:41

2460927.8686574 - 2460932.8095023

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
516843	2025-09-14 07:25:41	2460932.8095023	18.5809	0.10554		ABMag	g-ZTF	P48_ZTF-Cam
516841	2025-09-11 07:44:50	2460929.8228009			19.654	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]
519358	2025-09-11 07:44:09	2460929.8223264	19.8868	0.331347	19.6753	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
519357	2025-09-09 08:50:52	2460927.8686574			19.4949	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-09-13 12:04:51 - 2025-09-14 11:07:20

2460932.00337 - 2460932.96343

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
517030	2025-09-14 11:07:20	2460932.96343	18.525	0.103	19.36	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
517029	2025-09-13 12:04:51	2460932.00337			17.41	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	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
271041	2025-09-23 18:16:57	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	23:55:14.677	+39:45:49.34	2025-09-11 07:44:09.001	19.8868	g-ZTF		PSN		ZTF25abqkwce	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abqkwce		N
269988	2025-09-14 18:02:07	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	23:55:14.671	+39:45:49.60	2025-09-14 11:07:20.352	18.525	orange-ATLAS		PSN		ATLAS25lgh	ATLAS				N
269924	2025-09-14 11:11:16	GOTO_bot	G. Ramsay, D. O'Neill, K. Ackley et al.	GOTO	GOTO	23:55:14.709	+39:45:49.20	2025-09-12 23:51:06.048	19.07	L-GOTO		Other		GOTO25had	GOTO				N
269900	2025-09-14 08:57:41	BTSbot_bot	Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF	ZTF	ZTF	23:55:14.681	+39:45:49.45	2025-09-14 05:47:57.998	18.5746	r-ZTF		PSN		ZTF25abqkwce	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).	2025TNSTR3695....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

22128

2025-09-30 18:52:04

Jacob Wise

Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Zoe McGrath (LJMU)

ZTF

SN Ia-SC

0.04

1

1

ZTF

Spectrum confirms classification as a SN Ia-SC event. Fits of our new higher S/N spectrum to template spectra from previously classified SN Ia-SC events allows us to refine the transient's redshift to z = 0.040 ± 0.004. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR3940....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025xju_atrep_22128_ZTF.pdf	NGSF fits	2025-09-30 18:52:04	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
22128	2025-09-30 04:36:44	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025xju_2025-09-30_04-36-44.459_LT_SPRAT_ZTF.spec		Object

22070

2025-09-22 13:32:32

Jacob Wise

Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Ping Chen (Zhejiang), Joel Johansson (OKC)

ZTF

SN Ia-SC

0.043

1

2

ZTF

Spectrum appears similar to previously classified SN Ia-03fg-like events such as SN 2009dc, SN 2021zny and SN 2022ilv. A spectral template fit using Next Generation Superfit (NGSF, Goldwasser et al. 2022) estimates a redshift of z = 0.043 ± 0.008. Additional follow-up is encouraged to refine the transient's redshift.

2025TNSCR3816....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025xju_atrep_22070_ZTF.pdf	NGSF fits	2025-09-22 13:32:32	Jacob Wise
tns_2025xju_atrep_22070_ZTF.png	Comparison to 03fg-like events	2025-09-22 13:32:32	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
22070	2025-09-21 21:16:10	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025xju_2025-09-21_21-16-10.095_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 271041 of Group ZTF
Previous RA, DEC: 23:55:14.681, +39:45:49.45 (358.8111699, +39.7637349)
Updated RA, DEC: 23:55:14.677, +39:45:49.34 (358.81115369167, +39.763704941667)

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