2025cku | Transient Name Server

RA/DEC (2000)

09:50:44.767 +27:18:08.75

147.686530189 +27.3024315618

Type

SN IIn

Redshift

0.075

Discovery Report Classification Report

Related AstroNotes: DRAFT-2349, 2025-332

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-02-22 05:25:03.996

TNS AT

Y

Public

Y

Discovery Mag

20.3643

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
	22493	2025-11-23 00:00:00	FLWO-1.5m / FAST	1500	Gilbert Esquerdo, Perry Berlind	S. Karthik Yadavalli, Harsh Kumar	VHU-TDA	tns_2025cku_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii		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
	20525	2025-02-27 10:53:27	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025cku_2025-02-27_10-53-27.132862_P60_SEDM_ZTF.ascii		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

Clear-

LAST_LAST-Cam

2025-02-24 20:45:58 - 2025-03-18 17:07:34

2460731.36525 - 2460753.21359

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476761	2025-03-18 17:07:34	2460753.21359	17.95			ABMag	Clear-	LAST_LAST-Cam	400
476760	2025-02-24 20:45:58	2460731.36525			19.62	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-1

2025-02-20 20:30:01 - 2025-03-17 20:16:45

2460727.354179 - 2460752.344965

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476749	2025-03-17 20:16:45	2460752.344965	17.71	0.04		ABMag	L-GOTO	GOTO-N_GOTO-1	180
476748	2025-02-20 20:30:01	2460727.354179			19.6	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-02-21 07:36:44 - 2025-02-22 05:25:04

2460727.8171759 - 2460728.7257407

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
470962	2025-02-22 05:25:04	2460728.7257407	20.3643	0.222517		ABMag	r-ZTF	P48_ZTF-Cam
470961	2025-02-21 07:36:44	2460727.8171759			20.4637	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-02-23 06:49:44 - 2025-02-23 06:49:44

2460729.784537 - 2460729.784537

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
470963	2025-02-23 06:49:44	2460729.784537	19.4087	0.124473		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-02-23 11:02:30 - 2025-02-24 08:40:35

2460729.96007 - 2460730.86152

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
471686	2025-02-24 08:40:35	2460730.86152	19.075	0.152	19.48	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
471685	2025-02-23 11:02:30	2460729.96007			19.54	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

w-P1

PS1_GPC1

2025-02-27 07:30:38 - 2025-02-27 07:30:38

2460733.81294 - 2460733.81294

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
487024	2025-02-27 07:30:38	2460733.81294	18.59	0.03	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
254329	2025-05-06 22:35:24	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	09:50:44.767	+27:18:08.75	2025-02-27 07:30:38.016	18.59	w-P1		PSN		PS25ckw	Pan-STARRS				N
248834	2025-03-18 17:27:36	LAST_Bot1	R. Konno (WIS),E. Zimmerman (WIS),A. Horowicz (WIS) et al.	LAST	LAST	09:50:44.754	+27:18:08.76	2025-03-18 17:07:34.176	17.95	Clear-		PSN			LAST				N
248828	2025-03-18 15:55:35	GOTO_bot	D. O'Neill,G. Ramsay,K. Ackley et al.	GOTO	GOTO	09:50:44.776	+27:18:08.83	2025-03-17 20:16:45.408	17.71	L-GOTO		Other		GOTO25bbq	GOTO				N
245900	2025-02-25 08:46:21	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	09:50:44.789	+27:18:08.45	2025-02-24 08:40:35.328	19.075	orange-ATLAS		PSN		ATLAS25cam	ATLAS				N
245605	2025-02-23 07:57:02	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	09:50:44.778	+27:18:08.92	2025-02-22 05:25:03.996	20.3643	r-ZTF		PSN		ZTF25aagtjfn	ZTF			2025TNSTR.742....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

22492

2025-12-02 01:18:29

VHU-TDA

Yize Dong, Anya Nugent, V. Ashley Villar, S. Karthik Yadavalli, Alex Gagliano, Kaylee de Soto, Danielle Frostig, Harsh Kumar, Peter Blanchard

VHU-TDA

SN IIn

0.075

1

1

VHU-TDA

redshift measured from the template match

2025TNSCR4810....1D

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025cku_atrep_22492_VHU-TDA.png	best match with IIn from SNID-SAGE	2025-12-02 01:18:33	VHU-TDA

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
22493	2025-11-23 00:00:00	FLWO-1.5m / FAST	1500	Gilbert Esquerdo, Perry Berlind	S. Karthik Yadavalli, Harsh Kumar	VHU-TDA	tns_2025cku_2025-11-23_FLWO-1.5m_FAST_VHU-TDA.ascii		Object

20525

2025-03-03 20:12:15

ZTF_Bot1

J. Sollerman, S. Covarrubias, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SN II

0.08

1

ZTF

2025TNSCR.879....1S

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
20525	2025-02-27 10:53:27	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025cku_2025-02-27_10-53-27.132862_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 254329 of Group Pan-STARRS
Previous RA, DEC: 09:50:44.778, +27:18:08.92 (147.6865743, +27.3024789)
Updated RA, DEC: 09:50:44.767, +27:18:08.75 (147.686530189, +27.3024315618)

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