2025yyf | Transient Name Server

RA/DEC (2000)

07:11:44.055 +42:57:30.74

107.93356073333 +42.958538733333

Type

SN Ia

Redshift

0.082

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-09-30 10:38:23.997

TNS AT

Y

Public

Y

Discovery Mag

19.5275

Filter

g-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
	22206	2025-10-14 04:03:13	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025yyf_2025-10-14_04-03-13.323_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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-10-04 05:09:55 - 2025-10-04 05:09:55

2460952.71522 - 2460952.71522

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
522358	2025-10-04 05:09:55	2460952.71522			19.71	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

L-GOTO

GOTO-N_GOTO-1

2025-02-27 21:12:24 - 2025-10-30 03:53:40

2460734.383608 - 2460978.662267

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
527778	2025-10-30 03:53:40	2460978.662267	19.48	0.07		ABMag	L-GOTO	GOTO-N_GOTO-1	360
527777	2025-02-27 21:12:24	2460734.383608			19.8	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-09-25 12:15:43 - 2025-09-30 12:19:33

2460944.0109144 - 2460949.0135764

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
521124	2025-09-30 12:19:33	2460949.0135764	19.6294	0.126371		ABMag	r-ZTF	P48_ZTF-Cam
521122	2025-09-25 12:15:43	2460944.0109144			20.3949	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-09-23 12:15:08 - 2025-09-30 10:38:24

2460942.0105093 - 2460948.9433333

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
521123	2025-09-30 10:38:24	2460948.9433333	19.5275	0.0581096		ABMag	g-ZTF	P48_ZTF-Cam
522585	2025-09-30 10:38:24	2460948.9433333	19.5673	0.135151	20.6673	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
522584	2025-09-23 12:15:08	2460942.0105093			20.6523	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-10-05 13:46:48 - 2025-10-05 13:46:48

2460954.07417 - 2460954.07417

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
522359	2025-10-05 13:46:48	2460954.07417	18.788	0.183	18.94	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	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
275212	2025-10-30 10:17:04	GOTO_bot	D. O'Neill,K. Ackley,M. Dyer et al.	GOTO	GOTO	07:11:44.058	+42:57:30.97	2025-10-30 03:53:40.128	19.48	L-GOTO		Other		GOTO25jik	GOTO				N
272644	2025-10-08 18:16:34	Fink	Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al.	Fink	ZTF	07:11:44.055	+42:57:30.74	2025-09-30 10:38:23.997	19.5673	g-ZTF		PSN		ZTF25abuoijl	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abuoijl		N
272547	2025-10-05 16:04:51	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	07:11:44.068	+42:57:30.71	2025-10-05 13:46:48.288	18.788	orange-ATLAS		PSN		ATLAS25mkl	ATLAS				N
271884	2025-09-30 16:57:37	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	07:11:44.061	+42:57:30.86	2025-09-30 10:38:23.997	19.5275	g-ZTF		PSN		ZTF25abuoijl	ZTF			2025TNSTR3934....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

22206

2025-10-14 10:25:34

Jacob Wise

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

ZTF

SN Ia

0.082

1

1

ZTF

Spectrum is well-fit by template spectra from previously classified SN Ia events at a redshift of z = 0.082 ± 0.004. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR4125....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025yyf_atrep_22206_ZTF.pdf	NGSF fits	2025-10-14 10:25:34	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
22206	2025-10-14 04:03:13	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025yyf_2025-10-14_04-03-13.323_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 272644 of Group ZTF
Previous RA, DEC: 07:11:44.061, +42:57:30.86 (107.9335877, +42.9585712)
Updated RA, DEC: 07:11:44.055, +42:57:30.74 (107.93356073333, +42.958538733333)

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