2025ahpa | Transient Name Server

RA/DEC (2000)

07:33:29.948 +57:42:03.22

113.3747848 +57.7008948

Type

SN Ia

Redshift

0.032

Discovery Report Classification Report

Reporting Group

Tomo-e Gozen

Discovering Data Source

Tomo-e Gozen

Discovery Date

2025-12-16 12:33:07.200

TNS AT

Y

Public

Y

Discovery Mag

19.32

Filter

Clear-

Reporter/s

Taiga Sasaoka (The University of Tokyo), Reo Izumi (The University of Electro-Communications), Ichiro Takahashi (Institute of Science Tokyo), Shigeyuki Sako (The University of Tokyo), Nozomu Tominaga (National Astronomical Observatory of Japan)

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

P48_ZTF-Cam_r

▌

ATLAS-MLO_ATLAS-01_cyan

▌

Other_Other_Clear

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
	22656	2025-12-21 04:49:35	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025ahpa_2025-12-21_04-49-35.217689_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

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

r-ZTF

P48_ZTF-Cam

2025-12-15 09:48:10 - 2025-12-20 08:39:57

2461024.9084491 - 2461029.8610764

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540921	2025-12-20 08:39:57	2461029.8610764	17.7368	0.0501236		ABMag	r-ZTF	P48_ZTF-Cam
540920	2025-12-17 11:19:20	2461026.9717593	18.1149	0.0735187		ABMag	r-ZTF	P48_ZTF-Cam
540919	2025-12-15 09:48:10	2461024.9084491			20.4626	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

cyan-ATLAS

ATLAS-MLO_ATLAS-01

2025-12-14 11:30:49 - 2025-12-20 10:52:05

2461023.97973 - 2461029.95284

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
541098	2025-12-20 10:52:05	2461029.95284	17.754	0.049	19.68	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot
541097	2025-12-14 11:30:49	2461023.97973			19.57	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[Last non detection]

Clear-

Other_Other

2025-12-15 20:45:36 - 2025-12-16 12:33:07

2461025.365 - 2461026.023

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
540727	2025-12-16 12:33:07	2461026.023	19.32	0.51	18.12	ABMag	Clear-	Other_Other			Observation with Kiso-1.05m - Tomo-e Gozen.
540726	2025-12-15 20:45:36	2461025.365			17.31	ABMag	Clear-	Other_Other			[Last non detection] [Last non detection] Observation with the Tomo-e Gozen camera on the 1.05 Kiso Schmidt telescope.

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
281622	2025-12-20 17:33:06	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland (IfA et al.	ATLAS	ATLAS	07:33:29.979	+57:42:03.07	2025-12-20 10:52:05.376	17.754	cyan-ATLAS		PSN		ATLAS25pzt	ATLAS				N
281540	2025-12-20 09:27:06	BTSbot_bot	Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al.	ZTF	ZTF	07:33:29.948	+57:42:03.22	2025-12-17 11:19:20.003	18.1149	r-ZTF		PSN		ZTF25acinunl	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).		N
281457	2025-12-19 15:22:09	Taiga Sasaoka	Taiga Sasaoka (The University of Tokyo),Reo Izumi (The University of Electro-Communications),Ichiro Takahashi (Institute of Science Tokyo) et al.	Tomo-e Gozen	Tomo-e Gozen	07:33:29.973	+57:42:03.07	2025-12-16 12:33:07.200	19.32	Clear-		PSN			Tomo-e Gozen			2025TNSTR5068....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

22655

2025-12-21 05:33:07

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

0.032

1

ZTF

2025TNSCR5112....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
22656	2025-12-21 04:49:35	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025ahpa_2025-12-21_04-49-35.217689_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 281540 of Group ZTF
Previous RA, DEC: 07:33:29.973, +57:42:03.07 (113.3748867, +57.7008531)
Updated RA, DEC: 07:33:29.948, +57:42:03.22 (113.3747848, +57.7008948)

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