2025erh | Transient Name Server

RA/DEC (2000)

09:37:19.246 +39:46:42.04

144.330192223 +39.778345194

Type

SN Ia

Redshift

0.023245

Discovery Report Classification Report

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-03-17 06:11:51.002

TNS AT

Y

Public

Y

Discovery Mag

18.0744

Filter

r-ZTF

Reporter/s

Nabeel Rehemtulla (CIERA, NU), 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
	20580	2025-03-17 21:56:32	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho	Jacob Wise	ZTF	tns_2025erh_2025-03-17_21-56-31.544_LT_SPRAT_ZTF.spec		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

L-GOTO

GOTO-N_GOTO-2

2025-03-17 20:34:41 - 2025-03-17 20:34:41

2460752.357417 - 2460752.357417

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476595	2025-03-17 20:34:41	2460752.357417	17.91	0.05		ABMag	L-GOTO	GOTO-N_GOTO-2	180

L-GOTO

GOTO-N_GOTO-1

2025-02-26 20:13:58 - 2025-02-26 20:13:58

2460733.343026 - 2460733.343026

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476594	2025-02-26 20:13:58	2460733.343026			19.4	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-03-10 07:09:14 - 2025-03-17 06:11:51

2460744.7980787 - 2460751.7582292

4

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476462	2025-03-17 06:11:51	2460751.7582292	18.0744	0.0609432		ABMag	r-ZTF	P48_ZTF-Cam
478606	2025-03-17 06:11:51	2460751.7582292	18.0744	0.060943	20.0397	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
476461	2025-03-10 07:09:14	2460744.7980787			19.371	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]
478605	2025-03-10 07:09:14	2460744.7980787			19.371	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

g-ZTF

P48_ZTF-Cam

2025-03-17 08:09:43 - 2025-03-17 08:09:43

2460751.840081 - 2460751.840081

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476463	2025-03-17 08:09:43	2460751.840081	18.0913	0.0718711		ABMag	g-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-03-15 11:36:31 - 2025-03-17 09:09:47

2460749.98369 - 2460751.88179

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476504	2025-03-17 09:09:47	2460751.88179	18.109	0.08	19.18	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
476503	2025-03-15 11:36:31	2460749.98369			18.54	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

i-P1

PS1_GPC1

2025-03-18 09:43:15 - 2025-03-18 09:43:15

2460752.90503 - 2460752.90503

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
476905	2025-03-18 09:43:15	2460752.90503	17.98	0.06	20.7	ABMag	i-P1	PS1_GPC1	45	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
249765	2025-03-24 19:28:08	Fink	Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al.	Fink	ZTF	09:37:19.241	+39:46:42.09	2025-03-17 06:11:51.003	18.0744	r-ZTF		PSN		ZTF25aajcusp	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25aajcusp		N
248903	2025-03-19 17:50:36	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	09:37:19.246	+39:46:42.04	2025-03-18 09:43:14.592	17.98	i-P1		PSN		PS25amj	Pan-STARRS				N
248704	2025-03-17 22:31:42	GOTO_bot	D. O'Neill,K. Ackley,M. Dyer et al.	GOTO	GOTO	09:37:19.266	+39:46:42.36	2025-03-17 20:34:41.088	17.91	L-GOTO		Other		GOTO25bbr	GOTO				N
248665	2025-03-17 12:53:09	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	09:37:19.236	+39:46:42.07	2025-03-17 09:09:46.656	18.109	orange-ATLAS		PSN		ATLAS25csl	ATLAS				N
248647	2025-03-17 08:20:51	Fritz	Nabeel Rehemtulla (CIERA,NU),Christoffer Fremling (Caltech) et al.	ZTF	ZTF	09:37:19.237	+39:46:42.12	2025-03-17 06:11:51.002	18.0744	r-ZTF		PSN		ZTF25aajcusp	ZTF		Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).	2025TNSTR1018....1R	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20580

2025-03-18 03:33:45

Jacob Wise

Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Anna Ho (Cornell)

ZTF

SN Ia

0.023245

1

ZTF

Spectrum is well fit by SN Ia-norm templates from previously classified events. Redshift of 0.023245 ± 0.000008 from SDSS DR13. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022).

2025TNSCR1038....1W

Related files

File	Comments	Last Modified (UT)	Modified By
tns_2025erh_atrep_20580_ZTF.pdf	NGSF fits	2025-03-18 03:33:46	Jacob Wise

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
20580	2025-03-17 21:56:32	LT / SPRAT		Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho	Jacob Wise	ZTF	tns_2025erh_2025-03-17_21-56-31.544_LT_SPRAT_ZTF.spec		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 248903 of Group Pan-STARRS
Previous RA, DEC: 09:37:19.237, +39:46:42.12 (144.3301555, +39.7783661)
Updated RA, DEC: 09:37:19.246, +39:46:42.04 (144.330192223, 39.778345194)

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