2025aab | Transient Name Server

RA/DEC (2000)

08:22:44.553 -02:03:37.53

125.685639369 -2.06042521927

Type

SN Ia

Redshift

0.0295

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-01-20 07:35:48.001

TNS AT

Y

Public

Y

Discovery Mag

20.3988

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
	20441	2025-02-21 21:05:57	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025aab_2025-02-21_21-05-57.008_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
	20277	2025-01-30 21:00:00	Other / Other	5400	Claudio Balcon	Claudio Balcon	None	tns_2025aab_2025-01-30_21-00-00_Other_Other_None.dat	tns_2025aab_2025-01-30_21-00-00_Other_Other_None.fit	Object			We obtained the low-resolution spectrum R~100 using the FOSC-E5535 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.
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 We obtained the low-resolution spectrum R~100 using the FOSC-E5535 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-S_GOTO-4

2025-01-24 13:51:07 - 2025-01-24 13:51:07

2460700.077155 - 2460700.077155

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464387	2025-01-24 13:51:07	2460700.077155	18.25	0.07		ABMag	L-GOTO	GOTO-S_GOTO-4	180

L-GOTO

GOTO-N_GOTO-1

2025-01-16 23:00:43 - 2025-01-16 23:00:43

2460692.458829 - 2460692.458829

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464386	2025-01-16 23:00:43	2460692.458829			18.8	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-01-20 07:35:48 - 2025-01-23 07:49:24

2460695.8165278 - 2460698.8259722

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464025	2025-01-23 07:49:24	2460698.8259722	18.711	0.108041		ABMag	r-ZTF	P48_ZTF-Cam
464024	2025-01-20 07:35:48	2460695.8165278	20.3988	0.215775		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-01-19 08:05:26 - 2025-01-19 08:05:26

2460694.8371065 - 2460694.8371065

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464023	2025-01-19 08:05:26	2460694.8371065			20.0242	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

w-P1

PS1_GPC1

2025-01-29 09:43:40 - 2025-01-29 09:43:40

2460704.90532 - 2460704.90532

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
467143	2025-01-29 09:43:40	2460704.90532	17.17	0.01	22	ABMag	w-P1	PS1_GPC1	45	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
243577	2025-02-05 22:18:11	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	08:22:44.553	-02:03:37.53	2025-01-29 09:43:39.648	17.17	w-P1		PSN		PS25kr	Pan-STARRS				N
242314	2025-01-25 08:39:06	GOTO_bot	M. Kennedy,G. Ramsay,K. Ackley et al.	GOTO	GOTO	08:22:44.556	-02:03:37.74	2025-01-24 13:51:06.624	18.25	L-GOTO		Other		GOTO25mm	GOTO				N
242115	2025-01-23 08:33:05	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	08:22:44.532	-02:03:37.47	2025-01-20 07:35:48.001	20.3988	r-ZTF		PSN		ZTF25aacqvcq	ZTF			2025TNSTR.317....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

20441

2025-02-23 02:15:28

Jacob Wise

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

ZTF

SN Ia

0.0295

1

1

ZTF

Spectrum is well-fit by template spectra from previously classified SN Ia at a redshift of z = 0.0295 ± 0.0015, confirming previous classification and refining redshift. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR.746....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025aab_atrep_20441_ZTF.pdf	NGSF fits	2025-02-23 02:15:28	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
20441	2025-02-21 21:05:57	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Zoe McGrath	Jacob Wise	ZTF	tns_2025aab_2025-02-21_21-05-57.008_LT_SPRAT_ZTF.spec		Object

20277

2025-01-30 22:03:05

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

SN Ia

0.035

1

GELATO (Harutyunyan et al., 2008, A&A, 488, 383) suggests that this low S/N spectrum resembles that of a type Ia supernova. The redshift has been deduced from the SN spectral fitting.

2025TNSCR.422....1B

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
20277	2025-01-30 21:00:00	Other / Other	5400	Claudio Balcon	Claudio Balcon	None	tns_2025aab_2025-01-30_21-00-00_Other_Other_None.dat	tns_2025aab_2025-01-30_21-00-00_Other_Other_None.fit	Object			We obtained the low-resolution spectrum R~100 using the FOSC-E5535 spectrograph attached to a 0.41m telescope, in the course of Italian Supernovae Search Project.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 243577 of Group Pan-STARRS
Previous RA, DEC: 08:22:44.532, -02:03:37.47 (125.68555, -2.0604096)
Updated RA, DEC: 08:22:44.553, -02:03:37.53 (125.685639369, -2.06042521927)

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