2025heg | Transient Name Server

RA/DEC (2000)

18:20:46.154 +19:37:30.82

275.1923066 +19.6252269

Type

SN Ia

Redshift

0.0298

Discovery Report Classification Report

Related AstroNotes: 2026-218

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-04-09 11:27:19.998

TNS AT

Y

Public

Y

Discovery Mag

19.7172

Filter

g-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
	20761	2025-04-13 08:18:44	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025heg_2025-04-13_08-18-43.563527_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 z-step: v-step: Remarks

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-S_GOTO-3

2025-04-06 17:37:37 - 2025-04-06 17:37:37

2460772.23446 - 2460772.23446

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
481982	2025-04-06 17:37:37	2460772.23446			20	ABMag	L-GOTO	GOTO-S_GOTO-3	180		[Last non detection]

L-GOTO

GOTO-N_GOTO-1

2025-04-13 04:53:20 - 2025-04-13 04:53:20

2460778.703696 - 2460778.703696

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
481983	2025-04-13 04:53:20	2460778.703696	18.84	0.2		ABMag	L-GOTO	GOTO-N_GOTO-1	180

r-ZTF

P48_ZTF-Cam

2025-04-11 10:11:15 - 2025-04-11 10:11:15

2460776.9244792 - 2460776.9244792

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
481838	2025-04-11 10:11:15	2460776.9244792	18.9167	0.116792		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-04-06 11:59:02 - 2025-04-09 11:27:20

2460771.9993287 - 2460774.9773148

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
481837	2025-04-09 11:27:20	2460774.9773148	19.7172	0.154467		ABMag	g-ZTF	P48_ZTF-Cam
484016	2025-04-09 11:27:20	2460774.9773148	19.7172	0.154467	20.3129	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
481836	2025-04-06 11:59:02	2460771.9993287			20.2873	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]
484015	2025-04-06 11:59:02	2460771.9993287			20.2873	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-04-14 13:44:06 - 2025-04-14 13:44:06

2460780.07229 - 2460780.07229

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
482223	2025-04-14 13:44:06	2460780.07229	18.471	0.142	18.86	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-04-12 13:44:52 - 2025-04-12 13:44:52

2460778.07282 - 2460778.07282

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
482222	2025-04-12 13:44:52	2460778.07282			18.24	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[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
252571	2025-04-24 18:15:20	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	18:20:46.154	+19:37:30.82	2025-04-09 11:27:19.999	19.7172	g-ZTF		PSN		ZTF25aambsqu	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25aambsqu		N
251689	2025-04-15 16:51:53	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	18:20:46.142	+19:37:30.74	2025-04-14 13:44:05.856	18.471	orange-ATLAS		PSN		ATLAS25dvn	ATLAS				N
251536	2025-04-13 10:16:06	GOTO_bot	G. Ramsay, D. O'Neill, K. Ackley et al.	GOTO	GOTO	18:20:46.179	+19:37:30.85	2025-04-13 04:53:19.680	18.84	L-GOTO		Other		GOTO25bui	GOTO				N
251435	2025-04-11 11:45:10	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	18:20:46.150	+19:37:30.95	2025-04-09 11:27:19.998	19.7172	g-ZTF		PSN		ZTF25aambsqu	ZTF			2025TNSTR1359....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

20761

2025-04-14 14:14:25

ZTF_Bot1

K. Das, S. Covarrubias, M. Kasliwal (Caltech) on behalf of the ZTF CATS150 collaboration

ZTF

SN Ia

0.0298

1

ZTF

2025TNSCR1387....1D

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
20761	2025-04-13 08:18:44	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025heg_2025-04-13_08-18-43.563527_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 252571 of Group ZTF
Previous RA, DEC: 18:20:46.150, +19:37:30.95 (275.1922923, +19.6252634)
Updated RA, DEC: 18:20:46.154, +19:37:30.82 (275.1923066, +19.6252269)

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