2025ktf | Transient Name Server

RA/DEC (2000)

23:25:06.647 +01:46:31.26

351.277694359 +1.77535008786

Type

SLSN-I

Redshift

0.133

Discovery Report Classification Report

Reporting Group

ALeRCE

Discovering Data Source

ZTF

Discovery Date

2025-05-19 11:22:02.004

TNS AT

Y

Public

Y

Host Name

SDSS J232506.49+014632.5

Discovery Mag

18.8109

Filter

r-ZTF

Reporter/s

A. Munoz-Arancibia, G. Pignata, F.E. Bauer, F. Forster, A. Mourao, S. Jurado, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, F. Andrades, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker

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
	22018	2025-09-02 23:53:36	NOT / ALFOSC	1800	J. Sollerman, A. Gangopadhyay	A. Gangopadhyay	ZTF	tns_2025ktf_2025-09-02_23-53-35.636_NOT_ALFOSC_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
	21181	2025-05-28 00:00:00	LT / SPRAT		Charlotte-Grace Touchard-Paxton, Kate Maguire, Umut Burgaz, Christine Collins, Cillian O'Donnell, Ravi Seth, Jacobus Terwel, Tho	Charlotte-Grace Touchard-Paxton	TCD	tns_2025ktf_2025-05-28_LT_SPRAT_TCD.text		Object			SNID best match: sn1997ef type Ic-broad at -4.1d, redshift 0.14, 67% match
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 SNID best match: sn1997ef type Ic-broad at -4.1d, redshift 0.14, 67% match

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

Clear-

LAST_LAST-Cam

2024-07-13 23:46:24 - 2025-10-12 18:19:32

2460505.49056 - 2460961.26356

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
523339	2025-10-12 18:19:32	2460961.26356	19.14			ABMag	Clear-	LAST_LAST-Cam	380
523338	2024-07-13 23:46:24	2460505.49056			21.67	ABMag	Clear-	LAST_LAST-Cam	4720		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-01-10 20:09:05 - 2025-05-30 04:52:43

2460686.339644 - 2460825.703269

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
492808	2025-05-30 04:52:43	2460825.703269	18.81	0.12		ABMag	L-GOTO	GOTO-N_GOTO-2	180
492807	2025-01-10 20:09:05	2460686.339644			18.8	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-05-20 10:03:44 - 2025-05-20 10:03:44

2460815.91926 - 2460815.91926

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
491114	2025-05-20 10:03:44	2460815.91926			17.8	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

cyan-ATLAS

ATLAS-CHL_ATLAS-04

2025-05-24 09:25:01 - 2025-05-24 09:25:01

2460819.89237 - 2460819.89237

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
491115	2025-05-24 09:25:01	2460819.89237	18.638	0.129	19.07	ABMag	cyan-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot

r-ZTF

P48_ZTF-Cam

2025-05-19 11:22:02 - 2025-05-19 11:26:50

2460814.9736343 - 2460814.9769676

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
489038	2025-05-19 11:26:50	2460814.9769676	18.9522	0.1707	19.1959	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF
489037	2025-05-19 11:22:02	2460814.9736343	18.8109	0.122891	19.1863	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF

w-P1

PS1_GPC1

2025-06-03 13:56:25 - 2025-06-03 13:56:25

2460830.08084 - 2460830.08084

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
495219	2025-06-03 13:56:25	2460830.08084	18.71	0.04	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
273096	2025-10-12 18:44:02	LAST_Bot1	R. Konno (WIS), E. A. Zimmerman (WIS), A. Horowicz (WIS) et al.	LAST	LAST	23:25:06.665	+01:46:31.75	2025-10-12 18:19:31.584	19.14	Clear-		PSN			LAST				N
258583	2025-06-14 20:36:27	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	23:25:06.647	+01:46:31.26	2025-06-03 13:56:24.576	18.71	w-P1		PSN		PS25djs	Pan-STARRS				N
257327	2025-05-30 08:58:25	GOTO_bot	G. Ramsay, D. O'Neill, K. Ackley et al.	GOTO	GOTO	23:25:06.643	+01:46:31.49	2025-05-30 04:52:42.528	18.81	L-GOTO		Other		GOTO25der	GOTO				N
256531	2025-05-24 22:33:44	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	23:25:06.604	+01:46:31.32	2025-05-24 09:25:00.768	18.638	cyan-ATLAS		PSN		ATLAS25fih	ATLAS				N
255438	2025-05-19 15:08:33	ALeRCE	A. Munoz-Arancibia, G. Pignata, F.E. Bauer et al.	ALeRCE	ZTF	23:25:06.650	+01:46:31.23	2025-05-19 11:22:02.004	18.8109	r-ZTF		PSN	SDSS J232506.49+014632.5	ZTF25aaqqjfs	ZTF		SN candidate classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25aaqqjfs	2025TNSTR1832....1M	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22018

2025-09-14 21:50:50

Steve Schulze

R. Lunnan (OKC), S. Schulze (NU, CIERA), J. Sollerman, A. Gangopadhyay (OKC), J. Wise (LJMU)

ZTF

SLSN-I

0.133

1

ZTF

NGSF classification. Good matches with the SLSN-I 2015bn at 120 days after peak. Spectrum shows a conspicuous emission feature at 7300 from [Ca II]/[O II]. Redshift from DESI DR1.

2025TNSCR3702....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
22018	2025-09-02 23:53:36	NOT / ALFOSC	1800	J. Sollerman, A. Gangopadhyay	A. Gangopadhyay	ZTF	tns_2025ktf_2025-09-02_23-53-35.636_NOT_ALFOSC_ZTF.ascii		Object

21181

2025-05-29 21:34:35

Charlotte-Grace Touchard-Paxton

Charlotte-Grace Touchard-Paxton, Kate Maguire, Umut Burgaz, Christine Collins, Cillian O'Donnell, Ravi Seth, Jacobus Terwel, Tomas Muller Bravo

TCD

SN Ic

0.14

1

TCD

SNID classification, best match sm1997ef - Ic-broad, redshift 0.139, phase -4.1d.

2025TNSCR2028....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
21181	2025-05-28 00:00:00	LT / SPRAT		Charlotte-Grace Touchard-Paxton, Kate Maguire, Umut Burgaz, Christine Collins, Cillian O'Donnell, Ravi Seth, Jacobus Terwel, Tho	Charlotte-Grace Touchard-Paxton	TCD	tns_2025ktf_2025-05-28_LT_SPRAT_TCD.text		Object			SNID best match: sn1997ef type Ic-broad at -4.1d, redshift 0.14, 67% match

Comments

Object coordinates updated

Object coordinates updated according to AT-report 258583 of Group Pan-STARRS
Previous RA, DEC: 23:25:06.650, +01:46:31.23 (351.2777073, +1.775343)
Updated RA, DEC: 23:25:06.647, +01:46:31.26 (351.277694359, +1.77535008786)

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