2025usw | Transient Name Server

RA/DEC (2000)

18:27:30.095 +36:06:21.79

276.8753948875 +36.106053925

Type

SN Iax[02cx-like]

Redshift

0.056

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-08-21 05:09:04.999

TNS AT

Y

Public

Y

Discovery Mag

19.2699

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
	21852	2025-08-22 07:04:18	Lick-3m / KAST		K. Taggart	K.Taggart	UCSC	tns_2025usw_2025-08-22_07-04-18.00_Lick-3m_KAST_UCSC.flm		Object			The spectrum is consistent with SN 2002cx with a phase of -4.5 days. The blue side of the spectrum is well matched to that of SN 2002cx, while the red side appears to be more affected by host-galaxy contamination.
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 The spectrum is consistent with SN 2002cx with a phase of -4.5 days. The blue side of the spectrum is well matched to that of SN 2002cx, while the red side appears to be more affected by host-galaxy contamination.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-08-19 01:13:22 - 2025-08-19 01:13:22

2460906.55095 - 2460906.55095

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
511128	2025-08-19 01:13:22	2460906.55095			19.9	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-07-24 02:25:52 - 2025-08-31 01:43:19

2460880.601301 - 2460918.571747

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
514455	2025-08-31 01:43:19	2460918.571747	18.77	0.07		ABMag	L-GOTO	GOTO-N_GOTO-2	360
514454	2025-07-24 02:25:52	2460880.601301			20.2	ABMag	L-GOTO	GOTO-N_GOTO-2	360		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-08-16 07:30:55 - 2025-08-21 05:09:05

2460903.8131366 - 2460908.7146412

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
510788	2025-08-21 05:09:05	2460908.7146412	19.2699	0.132225		ABMag	r-ZTF	P48_ZTF-Cam
514297	2025-08-21 05:09:05	2460908.7146412	19.2699	0.132225	20.6887	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
510787	2025-08-16 07:30:55	2460903.8131366			21.1838	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]
514296	2025-08-16 07:30:55	2460903.8131366			20.6954	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

g-ZTF

P48_ZTF-Cam

2025-08-21 06:53:06 - 2025-08-21 06:53:06

2460908.786875 - 2460908.786875

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
510789	2025-08-21 06:53:06	2460908.786875	18.9379	0.0938997		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-08-20 08:52:54 - 2025-08-20 08:52:54

2460907.87007 - 2460907.87007

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
511129	2025-08-20 08:52:54	2460907.87007	19.745	0.144	20.19	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	110	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
268725	2025-08-31 05:38:10	GOTO_bot	M. Pursiainen,G. Ramsay,K. Ackley et al.	GOTO	GOTO	18:27:30.077	+36:06:21.73	2025-08-31 01:43:19.200	18.77	L-GOTO		Other		GOTO25gop	GOTO				N
268672	2025-08-30 18:17:33	Fink	Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al.	Fink	ZTF	18:27:30.095	+36:06:21.79	2025-08-21 05:09:05.000	19.2699	r-ZTF		PSN		ZTF25abkeyrv	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abkeyrv		N
267036	2025-08-22 09:18:11	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	18:27:30.056	+36:06:21.99	2025-08-20 08:52:54.048	19.745	orange-ATLAS		PSN		ATLAS25kdm	ATLAS				N
266862	2025-08-21 07:38:54	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	18:27:30.099	+36:06:21.71	2025-08-21 05:09:04.999	19.2699	r-ZTF		PSN		ZTF25abkeyrv	ZTF			2025TNSTR3303....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

21852

2025-08-23 20:59:54

Kirsty Taggart

K. Taggart, K. C. Patra, R. J. Foley (UCSC)

UCSC

SN Iax[02cx-like]

0.056

1

UCSC

2025TNSCR3348....1T

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
21852	2025-08-22 07:04:18	Lick-3m / KAST		K. Taggart	K.Taggart	UCSC	tns_2025usw_2025-08-22_07-04-18.00_Lick-3m_KAST_UCSC.flm		Object			The spectrum is consistent with SN 2002cx with a phase of -4.5 days. The blue side of the spectrum is well matched to that of SN 2002cx, while the red side appears to be more affected by host-galaxy contamination.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 268672 of Group ZTF
Previous RA, DEC: 18:27:30.099, +36:06:21.71 (276.8754119, +36.1060306)
Updated RA, DEC: 18:27:30.095, +36:06:21.79 (276.8753948875, +36.106053925)

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