2025sem | Transient Name Server

RA/DEC (2000)

18:45:56.024 +15:49:14.04

281.48343451 +15.82056641

Type

SN II

Redshift

0.0242

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-07-24 07:08:11.999

TNS AT

Y

Public

Y

Discovery Mag

20.4904

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

▌

ATLAS-TDO_ATLAS-05_wide

▌

P48_ZTF-Cam_r

▌

P48_ZTF-Cam_g

▌

ATLAS-MLO_ATLAS-01_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
	21692	2025-08-02 21:59:14	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025sem_2025-08-02_21-59-14.350_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

2025-07-25 00:01:33 - 2025-07-25 00:01:33

2460881.50108 - 2460881.50108

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
505297	2025-07-25 00:01:33	2460881.50108	18.45	0.074	19.99	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot

r-ZTF

P48_ZTF-Cam

2025-07-24 06:23:56 - 2025-07-24 06:23:56

2460880.7666204 - 2460880.7666204

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
505055	2025-07-24 06:23:56	2460880.7666204			20.7368	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-07-22 08:20:43 - 2025-07-26 04:33:55

2460878.8477199 - 2460882.6902199

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
505057	2025-07-26 04:33:55	2460882.6902199	18.6005	0.0768024		ABMag	g-ZTF	P48_ZTF-Cam
505056	2025-07-24 07:08:12	2460880.7973611	20.4904	0.0983006		ABMag	g-ZTF	P48_ZTF-Cam
507282	2025-07-24 07:08:12	2460880.7973611	20.5307	0.190228	20.9617	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
507281	2025-07-22 08:20:43	2460878.8477199			20.6179	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-07-24 07:40:03 - 2025-07-24 07:40:03

2460880.81948 - 2460880.81948

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
505296	2025-07-24 07:40:03	2460880.81948			17.98	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	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
264928	2025-08-03 18:16:22	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	18:45:56.024	+15:49:14.04	2025-07-24 07:08:11.999	20.5307	g-ZTF		PSN		ZTF25abdkrgt	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abdkrgt		N
263906	2025-07-26 19:12:48	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	18:45:56.022	+15:49:14.00	2025-07-25 00:01:33.312	18.45	wide-ATLAS		PSN		ATLAS25ihb	ATLAS				N
263781	2025-07-26 06:12:15	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	18:45:56.027	+15:49:14.08	2025-07-24 07:08:11.999	20.4904	g-ZTF		PSN		ZTF25abdkrgt	ZTF			2025TNSTR2921....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

21692

2025-08-03 09:24:34

Jacob Wise

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

ZTF

SN II

0.0242

1

ZTF

Spectrum displays broad hydrogen and helium P-Cygni features characteristic of a SN II. Redshift of z = 0.0242 ± 0.0011 from host galaxy narrow H-alpha emission.

2025TNSCR3060....1W

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
21692	2025-08-02 21:59:14	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025sem_2025-08-02_21-59-14.350_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 264928 of Group ZTF
Previous RA, DEC: 18:45:56.027, +15:49:14.08 (281.4834463, +15.8205776)
Updated RA, DEC: 18:45:56.024, +15:49:14.04 (281.48343451, +15.82056641)

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