2025ahli | Transient Name Server

RA/DEC (2000)

11:18:31.274 -04:01:17.63

169.630307407 -4.02156432612

Type

SN Ia

Redshift

0.063

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-12-17 11:53:16.995

TNS AT

Y

Public

Y

Discovery Mag

19.3636

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
	22756	2026-01-12 06:40:24	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025ahli_2026-01-12_06-40-24.263_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

2025-12-23 03:54:57 - 2025-12-23 03:54:57

2461032.66316 - 2461032.66316

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
542141	2025-12-23 03:54:57	2461032.66316	17.567	0.052	19.11	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot

w-P1

PS2_GPC2

2026-01-13 14:47:50 - 2026-01-13 14:47:50

2461054.11655 - 2461054.11655

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
549700	2026-01-13 14:47:50	2461054.11655	19.04	0.03	22	ABMag	w-P1	PS2_GPC2	45	Robot

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-12-20 08:18:23 - 2025-12-20 08:18:23

2461029.8461 - 2461029.8461

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
542140	2025-12-20 08:18:23	2461029.8461			18.99	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

L-GOTO

GOTO-N_GOTO-1

2025-12-08 05:03:56 - 2025-12-18 05:51:04

2461017.711072 - 2461027.743799

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540979	2025-12-18 05:51:04	2461027.743799	19.07	0.08		ABMag	L-GOTO	GOTO-N_GOTO-1	180
540978	2025-12-08 05:03:56	2461017.711072			19.5	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

BG-q-BlackGem

BG4_BlackGEM-Cam4

2025-12-16 07:50:21 - 2025-12-16 07:50:21

2461025.8266319 - 2461025.8266319

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
542113	2025-12-16 07:50:21	2461025.8266319			20.33	ABMag	BG-q-BlackGem	BG4_BlackGEM-Cam4	60	robotic	[Last non detection]

BG-q-BlackGem

BG3_BlackGEM-Cam3

2025-12-23 07:11:35 - 2025-12-23 07:11:35

2461032.7997106 - 2461032.7997106

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
542114	2025-12-23 07:11:35	2461032.7997106	18.59	0.06	20.67	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic

r-ZTF

P48_ZTF-Cam

2025-12-17 11:53:17 - 2025-12-18 12:08:32

2461026.9953356 - 2461028.0059259

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540242	2025-12-18 12:08:32	2461028.0059259	19.0696	0.114561		ABMag	r-ZTF	P48_ZTF-Cam
540241	2025-12-17 11:53:17	2461026.9953356	19.3636	0.135709		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-12-08 13:02:51 - 2025-12-08 13:02:51

2461018.0436458 - 2461018.0436458

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540240	2025-12-08 13:02:51	2461018.0436458			20.0293	ABMag	g-ZTF	P48_ZTF-Cam			[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
287065	2026-01-14 09:27:58	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	11:18:31.274	-04:01:17.63	2026-01-13 14:47:49.920	19.04	w-P1		PSN		PS26gn	Pan-STARRS				N
282071	2025-12-23 12:52:34	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	11:18:31.290	-04:01:17.90	2025-12-23 03:54:57.024	17.567	wide-ATLAS		PSN		ATLAS25qdp	ATLAS				N
282057	2025-12-23 10:53:02	BlackGEM_Bot1	E. A. Zimmerman (WIS), H. Tranin, F. Stoppa et al.	BlackGEM	BlackGEM	11:18:31.269	-04:01:17.87	2025-12-23 07:11:35.000	18.59	BG-q-BlackGem		PSN		BGEM J111831.27-040117.9	BlackGEM				N
281571	2025-12-20 11:32:31	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	11:18:31.267	-04:01:17.44	2025-12-18 05:51:04.320	19.07	L-GOTO		Other		GOTO25mco	GOTO				N
281219	2025-12-18 13:22:51	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	11:18:31.272	-04:01:17.56	2025-12-17 11:53:16.995	19.3636	r-ZTF		PSN		ZTF25aciofxo	ZTF			2025TNSTR5046....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

22755

2026-01-12 13:48:50

Jacob Wise

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

ZTF

SN Ia

0.063

1

1

ZTF

Spectrum is well-fit to template spectra from previously classified SN Ia. Redshift from host galaxy emission lines. Classification performed with Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2026TNSCR.134....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025ahli_atrep_22755_ZTF.pdf	NGSF fits	2026-01-12 13:48:50	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
22756	2026-01-12 06:40:24	LT / SPRAT		Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath	Jacob Wise	ZTF	tns_2025ahli_2026-01-12_06-40-24.263_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 287065 of Group Pan-STARRS
Previous RA, DEC: 11:18:31.272, -04:01:17.56 (169.6303019, -4.0215455)
Updated RA, DEC: 11:18:31.274, -04:01:17.63 (169.630307407, -4.02156432612)

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