2025ahjc | Transient Name Server

RA/DEC (2000)

02:18:21.943 +36:31:22.50

34.591430211111 +36.522916555556

Type

SN Ia

Redshift

0.037069

Discovery Report Classification Report

Reporting Group

SGLF

Discovering Data Source

ZTF

Discovery Date

2025-12-16 04:31:18.000

TNS AT

Y

Public

Y

Host Name

UGC 01770

Host Redshift

0.037069

Discovery Mag

19.866

Filter

g-ZTF

Reporter/s

I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia, A.E. Hernández-Díaz, M. Quintana-Ansaldo, E. Lekaroz-Urriza (ULL), F. Poidevin (IAC and ULL), C. Jiménez Ángel (GRANTECAN), R. Shirley (MPE), R. Marques-Chaves (Univ. of Geneva), and S. Geier (GRANTECAN & IAC) on behalf of SGLF

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
	22694	2025-12-29 04:33:30	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025ahjc_2025-12-29_04-33-29.554965_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
	22690	2025-12-26 19:38:00	BL41 / FOSC-E5535	5400	Claudio Balcon	Claudio Balcon	None	tns_2025ahjc_2025-12-26_19-38-00_BL41_FOSC-E5535_None.dat	tns_2025ahjc_2025-12-26_19-38-00_BL41_FOSC-E5535_None.fit	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

2025-12-18 21:56:33 - 2025-12-18 21:56:33

2461028.41427 - 2461028.41427

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
541014	2025-12-18 21:56:33	2461028.41427			19.82	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

g-WFST

WFST_WFST-WFC

2026-01-03 15:05:46 - 2026-01-03 15:05:46

2461044.129 - 2461044.129

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
567634	2026-01-03 15:05:46	2461044.129	17.84	0.01		ABMag	g-WFST	WFST_WFST-WFC	30

Clear-

LAST_LAST-Cam

2025-12-08 16:33:32 - 2025-12-17 17:59:16

2461018.18995 - 2461027.24949

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540573	2025-12-17 17:59:16	2461027.24949	19.26			ABMag	Clear-	LAST_LAST-Cam	400
540572	2025-12-08 16:33:32	2461018.18995			20.54	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-12-10 22:34:22 - 2025-12-20 20:47:19

2461020.440528 - 2461030.366189

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
541251	2025-12-20 20:47:19	2461030.366189	18.46	0.05		ABMag	L-GOTO	GOTO-N_GOTO-2	180
541250	2025-12-10 22:34:22	2461020.440528			20.1	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-12-14 06:18:56 - 2025-12-16 04:31:18

2461023.7631481 - 2461025.6884028

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
539927	2025-12-16 04:31:18	2461025.6884028	19.866	0.221		ABMag	g-ZTF	P48_ZTF-Cam	30	ZTFbot
544849	2025-12-16 04:31:18	2461025.6884028	19.8657	0.221262	20.2064	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
544848	2025-12-14 06:18:57	2461023.7631597			20.5285	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink
539926	2025-12-14 06:18:56	2461023.7631481			20.528	ABMag	g-ZTF	P48_ZTF-Cam	30	ZTFbot	[Last non detection]

cyan-ATLAS

ATLAS-MLO_ATLAS-01

2025-12-20 08:04:28 - 2025-12-20 08:04:28

2461029.83644 - 2461029.83644

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
541015	2025-12-20 08:04:28	2461029.83644	18.49	0.078	19.66	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	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
296007	2026-03-20 10:28:50	WFST_SN	Zelin Xu, Dezheng Meng, Ji-an Jiang et al.	WFST	WFST	02:18:21.940	+36:31:22.59	2026-01-03 15:05:45.600	17.84	g-WFST		PSN		WFST260103acidk	WFST				N
283721	2025-12-29 19:15:25	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	02:18:21.943	+36:31:22.50	2025-12-16 04:31:18.002	19.8657	g-ZTF		PSN		ZTF25aciguje	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25aciguje		N
281698	2025-12-21 01:04:47	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	02:18:21.950	+36:31:22.16	2025-12-20 20:47:18.816	18.46	L-GOTO		Other		GOTO25mft	GOTO				N
281589	2025-12-20 12:00:17	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	02:18:21.963	+36:31:22.77	2025-12-20 08:04:28.416	18.49	cyan-ATLAS		PSN		ATLAS25pzd	ATLAS				N
281382	2025-12-19 09:14:03	LAST_Bot1	E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS) et al.	LAST	LAST	02:18:21.904	+36:31:22.53	2025-12-17 17:59:15.936	19.26	Clear-		PSN			LAST				N
281077	2025-12-18 05:17:27	Ismael Perez-Fournon	I. Pérez-Fournon (IAC and ULL), D. Cano-Morales, I. Correa-Plasencia et al.	SGLF	ZTF	02:18:21.939	+36:31:22.57	2025-12-16 04:31:18.000	19.866	g-ZTF		PSN	UGC 01770	ZTF25aciguje	ZTF		SN candidate discovered using the public ZTF alerts, the LSST/ZTF brokers, and our SGLF filters. ZTF light curve available at the LSST/ZTF brokers, e.g.: https://lasair-ztf.lsst.ac.uk/objects/ZTF25aciguje/ https://alerce.online/object/ZTF25aciguje https://antares.noirlab.edu/loci/ANT2025k5y1ycpeyatg	2025TNSTR5039....1P	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22693

2025-12-29 05:28:05

ZTF_Bot1

C. Fremling, D. Neill, Y. Sharma on behalf of the SEDM Team (Caltech) and the Zwicky Transient Facility (ZTF) based on SNIascore

ZTF

SN Ia

0.037069

1

ZTF

2025TNSCR5218....1F

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
22694	2025-12-29 04:33:30	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025ahjc_2025-12-29_04-33-29.554965_P60_SEDM_ZTF.ascii		Object

22689

2025-12-26 21:11:14

Claudio Balcon

Claudio Balcon (Belluno A.O. ISSP)

None

SN Ia

0.037069

1

GELATO Harutyunyan et al., 2008, A&A, 488, 383 (gelato@tng.iac.es) suggests that this spectrum resembles that of a type Ia supernova at the redshift of the host galaxy, value from NED.

2025TNSCR5177....1B

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
22690	2025-12-26 19:38:00	BL41 / FOSC-E5535	5400	Claudio Balcon	Claudio Balcon	None	tns_2025ahjc_2025-12-26_19-38-00_BL41_FOSC-E5535_None.dat	tns_2025ahjc_2025-12-26_19-38-00_BL41_FOSC-E5535_None.fit	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 283721 of Group ZTF
Previous RA, DEC: 02:18:21.939, +36:31:22.57 (34.591412, +36.522936)
Updated RA, DEC: 02:18:21.943, +36:31:22.50 (34.591430211111, +36.522916555556)

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