2025ahdk | Transient Name Server

RA/DEC (2000)

10:55:07.105 +51:39:46.53

163.779605376 +51.6629250549

Type

SN IIn

Redshift

0.1704648

Discovery Report Classification Report

Reporting Group

ALeRCE

Discovering Data Source

ZTF

Discovery Date

2025-12-16 09:53:00.004

TNS AT

Y

Public

Y

Host Name

SDSS J105507.01+513941.3

Host Redshift

0.1704648

Discovery Mag

19.895

Filter

g-ZTF

Reporter/s

A. Munoz-Arancibia, F.E. Bauer, G. Pignata, F. Forster, A. Mourao, J. Correa-Orellana, H. Kumar, 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

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
	22795	2026-01-12 12:30:14	Lick-3m / KAST		Erica Hammerstein, Ryan Chornock	Ryan Chornock	ZTF	tns_2025ahdk_2026-01-12_12-30-14_Lick-3m_KAST_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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-12-21 03:25:16 - 2025-12-24 02:20:35

2461030.64255 - 2461033.59763

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
542350	2025-12-24 02:20:35	2461033.59763	18.912	0.093	19.73	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot
542349	2025-12-21 03:25:16	2461030.64255			19.91	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

r-WFST

WFST_WFST-WFC

2025-12-13 19:58:05 - 2025-12-13 19:58:05

2461023.332 - 2461023.332

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
568663	2025-12-13 19:58:05	2461023.332	20.88	0.09		ABMag	r-WFST	WFST_WFST-WFC	30

g-WFST

WFST_WFST-WFC

2025-12-09 19:53:46 - 2025-12-09 19:53:46

2461019.329 - 2461019.329

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
568662	2025-12-09 19:53:46	2461019.329			21.4	ABMag	g-WFST	WFST_WFST-WFC	30		[Last non detection]

Clear-

LAST_LAST-Cam

2024-03-04 21:46:36 - 2025-12-22 01:18:55

2460374.40736 - 2461031.5548

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
541708	2025-12-22 01:18:55	2461031.5548	19.42			ABMag	Clear-	LAST_LAST-Cam	400
541707	2024-03-04 21:46:36	2460374.40736			21.86	ABMag	Clear-	LAST_LAST-Cam	3980		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-12-11 02:46:19 - 2025-12-19 02:26:51

2461020.615495 - 2461028.601978

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540682	2025-12-19 02:26:51	2461028.601978	19.47	0.14		ABMag	L-GOTO	GOTO-N_GOTO-2	180
540681	2025-12-11 02:46:19	2461020.615495			19.6	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

w-P1

PS2_GPC2

2025-12-26 13:10:47 - 2025-12-26 13:10:47

2461036.04916 - 2461036.04916

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
545572	2025-12-26 13:10:47	2461036.04916	18.86	0.01	22	ABMag	w-P1	PS2_GPC2	45	Robot

r-ZTF

P48_ZTF-Cam

2025-12-13 11:19:07 - 2025-12-13 11:19:07

2461022.9716088 - 2461022.9716088

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
539468	2025-12-13 11:19:07	2461022.9716088			20.3398	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF

g-ZTF

P48_ZTF-Cam

2025-12-16 09:53:00 - 2025-12-16 09:53:00

2461025.9118056 - 2461025.9118056

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
539469	2025-12-16 09:53:00	2461025.9118056	19.895	0.163639	20.3383	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF

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
296687	2026-03-20 10:38:59	WFST_SN	Zelin Xu, Dezheng Meng, Ji-an Jiang et al.	WFST	WFST	10:55:07.110	+51:39:46.57	2025-12-13 19:58:04.800	20.88	r-WFST		PSN		WFST251213bsrfb	WFST				N
284327	2025-12-30 21:32:37	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	10:55:07.105	+51:39:46.53	2025-12-26 13:10:47.424	18.86	w-P1		PSN		PS25kvx	Pan-STARRS				N
282178	2025-12-24 12:44:40	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	10:55:07.113	+51:39:46.40	2025-12-24 02:20:35.232	18.912	wide-ATLAS		PSN		ATLAS25qen	ATLAS				N
281875	2025-12-22 08:12:30	LAST_Bot1	E. A. Zimmerman (WIS), R. Konno (WIS), A. Horowicz (WIS) et al.	LAST	LAST	10:55:07.009	+51:39:46.40	2025-12-22 01:18:54.720	19.42	Clear-		PSN			LAST				N
281435	2025-12-19 10:43:36	GOTO_bot	D. O'Neill, G. Ramsay, K. Ackley et al.	GOTO	GOTO	10:55:07.143	+51:39:46.18	2025-12-19 02:26:51.072	19.47	L-GOTO		Other		GOTO25lyy	GOTO				N
280872	2025-12-16 19:58:11	ALeRCE	A. Munoz-Arancibia, F.E. Bauer, G. Pignata et al.	ALeRCE	ZTF	10:55:07.128	+51:39:46.68	2025-12-16 09:53:00.004	19.895	g-ZTF		PSN	SDSS J105507.01+513941.3	ZTF25achwsgj	ZTF		Early SN candidate (g-rise > 0.12+-0.05 mag/day) 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/ZTF25achwsgj	2025TNSTR4996....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

22794

2026-01-16 16:55:22

ZTF_Bot1

R. Chornock, J. Castaneda Jaimes, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SN IIn

0.1704648

1

ZTF

2026TNSCR.198....1C

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
22795	2026-01-12 12:30:14	Lick-3m / KAST		Erica Hammerstein, Ryan Chornock	Ryan Chornock	ZTF	tns_2025ahdk_2026-01-12_12-30-14_Lick-3m_KAST_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 284327 of Group Pan-STARRS
Previous RA, DEC: 10:55:07.128, +51:39:46.68 (163.7797015, +51.6629661)
Updated RA, DEC: 10:55:07.105, +51:39:46.53 (163.779605376, +51.6629250549)

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