2025tra | Transient Name Server

RA/DEC (2000)

02:45:15.378 +08:27:43.02

41.314074 +8.4619513

Type

SN Ia

Redshift

0.039

Discovery Report Classification Report

Reporting Group

GOTO

Discovering Data Source

GOTO

Discovery Date

2025-08-12 18:22:08.832

TNS AT

Y

Public

Y

Discovery Mag

18.17

Filter

L-GOTO

Reporter/s

D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

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
	21809	2025-08-18 07:56:30	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025tra_2025-08-18_07-56-29.890055_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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-08-14 03:34:07 - 2025-08-14 03:34:07

2460901.64869 - 2460901.64869

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
509653	2025-08-14 03:34:07	2460901.64869			18.29	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

Clear-

LAST_LAST-Cam

2025-01-22 17:04:15 - 2025-08-29 01:23:24

2460698.21128 - 2460916.55792

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
513564	2025-08-29 01:23:24	2460916.55792	17.5			ABMag	Clear-	LAST_LAST-Cam	400
513563	2025-01-22 17:04:15	2460698.21128			21.35	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-S_GOTO-3

2025-08-12 18:22:09 - 2025-08-12 18:22:09

2460900.265377 - 2460900.265377

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
508289	2025-08-12 18:22:09	2460900.265377	18.17	0.09		ABMag	L-GOTO	GOTO-S_GOTO-3	180

L-GOTO

GOTO-N_GOTO-1

2025-08-11 04:17:23 - 2025-08-11 04:17:23

2460898.678739 - 2460898.678739

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
508288	2025-08-11 04:17:23	2460898.678739			18.4	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

BG-q-BlackGem

BG3_BlackGEM-Cam3

2025-07-22 08:58:34 - 2025-07-22 08:58:34

2460878.8740046 - 2460878.8740046

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
586335	2025-07-22 08:58:34	2460878.8740046			20.14	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic	[Last non detection]

BG-q-BlackGem

BG2_BlackGEM-Cam2

2025-08-12 09:23:15 - 2025-08-12 09:23:15

2460899.8911458 - 2460899.8911458

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
586336	2025-08-12 09:23:15	2460899.8911458	17.83	0.09	18.77	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic

r-ZTF

P48_ZTF-Cam

2025-08-17 10:10:17 - 2025-08-17 10:10:17

2460904.9238079 - 2460904.9238079

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
509525	2025-08-17 10:10:17	2460904.9238079	17.3506	0.0426308		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-08-17 11:33:09 - 2025-08-17 11:33:09

2460904.9813542 - 2460904.9813542

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
509526	2025-08-17 11:33:09	2460904.9813542	17.3442	0.0398975		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-08-17 10:29:31 - 2025-08-17 10:29:31

2460904.93716 - 2460904.93716

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
509654	2025-08-17 10:29:31	2460904.93716	17.555	0.038	19.38	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	110	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
305732	2026-05-27 14:48:44	BlackGEM_Bot1	H. Tranin, F. Stoppa, D. Pieterse et al.	BlackGEM	BlackGEM	02:45:15.378	+08:27:43.12	2025-08-12 09:23:15.000	17.83	BG-q-BlackGem		PSN		BGEM J024515.38+082743.1	BlackGEM				N
268298	2025-08-29 03:34:44	LAST_Bot1	E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS) et al.	LAST	LAST	02:45:15.292	+08:27:41.43	2025-08-29 01:23:24.288	17.5	Clear-		PSN			LAST				N
266226	2025-08-17 13:11:07	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	02:45:15.360	+08:27:43.02	2025-08-17 10:29:30.624	17.555	orange-ATLAS		PSN		ATLAS25jqv	ATLAS				N
266177	2025-08-17 11:59:32	BTSbot_bot	Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF	ZTF	ZTF	02:45:15.378	+08:27:43.02	2025-08-17 10:10:17.002	17.3506	r-ZTF		PSN		ZTF25abjkphq	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).		N
265574	2025-08-12 19:02:31	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	02:45:15.393	+08:27:42.93	2025-08-12 18:22:08.832	18.17	L-GOTO		Other		GOTO25ftf	GOTO			2025TNSTR3161....1O	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

21809

2025-08-18 08:39:55

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

0.039

1

ZTF

2025TNSCR3267....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
21809	2025-08-18 07:56:30	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025tra_2025-08-18_07-56-29.890055_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 266177 of Group ZTF
Previous RA, DEC: 02:45:15.393, +08:27:42.93 (41.314136, +8.461925)
Updated RA, DEC: 02:45:15.378, +08:27:43.02 (41.314074, +8.4619513)

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