2025aaoz | Transient Name Server

RA/DEC (2000)

07:48:19.120 +17:56:22.25

117.0796672625 +17.9395131875

Type

SN Ia

Redshift

0.089

Discovery Report Classification Report

Related AstroNotes: 2025-304

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-10-16 10:31:22.995

TNS AT

Y

Public

Y

Discovery Mag

19.2316

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
	22261	2025-10-21 06:05:27	NOT / ALFOSC	1200	Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko		None	tns_2025aaoz_2025-10-21_06-05-27_NOT_ALFOSC_None.txt	tns_2025aaoz_2025-10-21_06-05-27_NOT_ALFOSC_None.fits	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

2025-10-20 03:51:39 - 2025-10-20 03:51:39

2460968.66087 - 2460968.66087

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525130	2025-10-20 03:51:39	2460968.66087	18.81	0.088	19.92	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot

L-GOTO

GOTO-N_GOTO-2

2025-10-11 04:19:31 - 2025-10-11 04:19:31

2460959.680222 - 2460959.680222

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524847	2025-10-11 04:19:31	2460959.680222			19	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

L-GOTO

GOTO-N_GOTO-1

2025-10-19 03:48:29 - 2025-10-19 03:48:29

2460967.658674 - 2460967.658674

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524848	2025-10-19 03:48:29	2460967.658674	19.04	0.14		ABMag	L-GOTO	GOTO-N_GOTO-1	180

r-ZTF

P48_ZTF-Cam

2025-10-16 12:04:26 - 2025-10-16 12:04:26

2460965.0030787 - 2460965.0030787

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524203	2025-10-16 12:04:26	2460965.0030787	19.2879	0.100996		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-10-10 12:25:32 - 2025-10-16 10:31:23

2460959.0177315 - 2460964.9384606

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
524202	2025-10-16 10:31:23	2460964.9384606	19.2316	0.116401		ABMag	g-ZTF	P48_ZTF-Cam
526874	2025-10-16 10:31:23	2460964.9384606	19.2316	0.116401	19.9258	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
524201	2025-10-10 12:25:32	2460959.0177315			19.5984	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]
526873	2025-10-10 12:25:32	2460959.0177315			19.5984	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-10-19 14:48:12 - 2025-10-19 14:48:12

2460968.11681 - 2460968.11681

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525129	2025-10-19 14:48:12	2460968.11681			19.23	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
274808	2025-10-25 18:14:55	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	07:48:19.120	+17:56:22.25	2025-10-16 10:31:22.996	19.2316	g-ZTF		PSN		ZTF25abxdupm	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abxdupm		N
274035	2025-10-20 08:38:49	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	07:48:19.105	+17:56:22.12	2025-10-20 03:51:39.168	18.81	wide-ATLAS		PSN		ATLAS25mza	ATLAS				N
273895	2025-10-19 10:36:53	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	07:48:19.145	+17:56:21.69	2025-10-19 03:48:29.088	19.04	L-GOTO		Other		GOTO25iri	GOTO				N
273542	2025-10-16 12:19:18	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	07:48:19.105	+17:56:22.33	2025-10-16 10:31:22.995	19.2316	g-ZTF		PSN		ZTF25abxdupm	ZTF			2025TNSTR4149....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

22261

2025-10-21 13:33:15

Tuomas Kangas

Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko, Tuomas Kangas, Christina Humina, Erkki Kankare (University of Turku), Niko Pyykkinen (NOT)

None

SN Ia

0.089

1

Classification was done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) as part of a remote observing course at the University of Turku. AT 2025aaoz is matched by a normal SN Ia around peak. An SDSS spectrum of its host galaxy (J074819.11+175622.2) returns a redshift of 0.089, consistent with the SNID fit.

2025TNSCR4231....1V

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
22261	2025-10-21 06:05:27	NOT / ALFOSC	1200	Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko		None	tns_2025aaoz_2025-10-21_06-05-27_NOT_ALFOSC_None.txt	tns_2025aaoz_2025-10-21_06-05-27_NOT_ALFOSC_None.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 274808 of Group ZTF
Previous RA, DEC: 07:48:19.105, +17:56:22.33 (117.0796021, +17.9395373)
Updated RA, DEC: 07:48:19.120, +17:56:22.25 (117.0796672625, +17.9395131875)

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