2024agkj | Transient Name Server

RA/DEC (2000)

08:36:22.453 +42:01:32.30

129.093554159 +42.0256379529

Type

SLSN-I

Redshift

0.1934

Discovery Report Classification Report

Related AstroNotes: 2025-28, 2025-32

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2024-12-30 10:43:29.999

TNS AT

Y

Public

Y

Discovery Mag

20.8043

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

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
	20420	2025-02-14 03:13:58	LT / SPRAT	2400	Beth Garton, Iain Steele, Helen Jermak	Beth Garton	None	tns_2024agkj_2025-02-14_03-13-57.883_LT_SPRAT_None.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

2024-03-05 19:14:53 - 2025-01-27 20:09:27

2460375.302 - 2460703.3399

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464963	2025-01-27 20:09:27	2460703.3399	18.73			ABMag	Clear-	LAST_LAST-Cam	400
464962	2024-03-05 19:14:53	2460375.302			20.79	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-01-16 21:56:25 - 2025-01-24 21:23:27

2460692.414184 - 2460700.391293

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464413	2025-01-24 21:23:27	2460700.391293	18.38	0.12		ABMag	L-GOTO	GOTO-N_GOTO-2	180
464412	2025-01-16 21:56:25	2460692.414184			18.6	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2024-12-30 06:28:51 - 2024-12-30 06:28:51

2460674.7700347 - 2460674.7700347

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
460490	2024-12-30 06:28:51	2460674.7700347			19.9472	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2024-12-30 10:43:30 - 2025-01-03 05:11:11

2460674.946875 - 2460678.7160995

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
460492	2025-01-03 05:11:11	2460678.7160995	19.553	0.196562		ABMag	g-ZTF	P48_ZTF-Cam
460491	2024-12-30 10:43:30	2460674.946875	20.8043	0.347237		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-01-06 10:40:57 - 2025-01-06 10:40:57

2460681.9451 - 2460681.9451

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
461337	2025-01-06 10:40:57	2460681.9451	19.352	0.182	19.57	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-01-04 12:01:08 - 2025-01-04 12:01:08

2460680.00079 - 2460680.00079

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
461336	2025-01-04 12:01:08	2460680.00079			19.57	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

w-P1

PS1_GPC1

2025-01-04 11:46:17 - 2025-01-04 11:46:17

2460679.99047 - 2460679.99047

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476223	2025-01-04 11:46:17	2460679.99047	19.65	0.06	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
248495	2025-03-15 21:54:12	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	08:36:22.453	+42:01:32.30	2025-01-04 11:46:16.608	19.65	w-P1		PSN		PS25afj	Pan-STARRS				N
242619	2025-01-27 21:12:02	LAST_Bot1	R. Konno (WIS),E. Zimmerman (WIS),A. Horowicz (WIS) et al.	LAST	LAST	08:36:22.540	+42:01:32.90	2025-01-27 20:09:27.360	18.73	Clear-		PSN			LAST				N
242327	2025-01-25 09:54:09	GOTO_bot	D. O'Neill,G. Ramsay,K. Ackley et al.	GOTO	GOTO	08:36:22.501	+42:01:31.59	2025-01-24 21:23:27.456	18.38	L-GOTO		Other		GOTO25mx	GOTO				N
240654	2025-01-06 15:49:00	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	08:36:22.468	+42:01:31.87	2025-01-06 10:40:56.640	19.352	orange-ATLAS		PSN		ATLAS25agh	ATLAS				N
240255	2025-01-03 06:10:57	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	08:36:22.460	+42:01:32.42	2024-12-30 10:43:29.999	20.8043	g-ZTF		PSN		ZTF25aaaecsu	ZTF			2025TNSTR..36....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

20420

2025-02-19 16:48:16

Jacob Wise

Beth Garton (LJMU), Jacob Wise (LJMU), Nabeel Rehemtulla (Northwestern), Steve Schulze (Northwestern), Adam Miller (Northwestern), Iain Steele (LJMU), Helen Jermak (LJMU)

None

SLSN-I

0.1934

1

2

LT SPRAT spectrum is fit by template spectra from previously classified SLSN-I and SN Ic-BL events. A previous mostly blue and featureless spectrum taken by Binospec on MJD 60703.381 displayed host emission features at a redshift of z = 0.1934. This corresponds to a transient magnitude of M < -21, supporting the classification of the event as an SLSN-I. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR.684....1G

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2024agkj_atrep_20420.pdf	NGSF fits to LT SPRAT spectrum	2025-02-19 16:48:17	Jacob Wise
tns_2024agkj_atrep_20420.ascii	Binospec spectrum taken on MJD 60703.381	2025-02-19 16:48:17	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
20420	2025-02-14 03:13:58	LT / SPRAT	2400	Beth Garton, Iain Steele, Helen Jermak	Beth Garton	None	tns_2024agkj_2025-02-14_03-13-57.883_LT_SPRAT_None.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 248495 of Group Pan-STARRS
Previous RA, DEC: 08:36:22.460, +42:01:32.42 (129.0935829, +42.025672)
Updated RA, DEC: 08:36:22.453, +42:01:32.30 (129.093554159, 42.0256379529)

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