2025ei | Transient Name Server

RA/DEC (2000)

11:44:47.403 +19:46:24.38

176.1975142 +19.7734393

Type

SN II

Redshift

0.03

Discovery Report Classification Report

Related AstroNotes: 2025-8

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-01-06 12:49:48.576

TNS AT

Y

Public

Y

Discovery Mag

18.844

Filter

orange-ATLAS

Reporter/s

J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

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
	20114	2025-01-09 07:22:02	ESO-NTT / EFOSC2-NTT	899	F.Ragosta, I.Salmaso	S.Benetti	ePESSTO+	tns_2025ei_2025-01-09_07-22-02_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2025ei_2025-01-09_07-22-02_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	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
	20058	2025-01-07 15:51:10	UH88 / SNIFS	1200	Hinkle		SCAT	tns_2025ei_2025-01-07_15-51-10_UH88_SNIFS_SCAT.dat		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

2025-01-06 04:52:43 - 2025-01-08 02:29:54

2460681.703275 - 2460683.604105

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
461580	2025-01-08 02:29:54	2460683.604105	17.22	0.04		ABMag	L-GOTO	GOTO-N_GOTO-2	180
461579	2025-01-06 04:52:43	2460681.703275			19.2	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-01-12 08:41:20 - 2025-01-12 08:41:20

2460687.862037 - 2460687.862037

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462116	2025-01-12 08:41:20	2460687.862037			18.5739	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF

g-ZTF

P48_ZTF-Cam

2025-01-12 11:03:07 - 2025-01-12 11:03:07

2460687.9604977 - 2460687.9604977

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462117	2025-01-12 11:03:07	2460687.9604977	17.1282	0.0440961	19.3339	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-01-05 13:10:56 - 2025-01-05 13:10:56

2460681.04926 - 2460681.04926

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
461348	2025-01-05 13:10:56	2460681.04926			19.46	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[Last non detection]

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-01-06 12:49:49 - 2025-01-06 12:49:49

2460682.03459 - 2460682.03459

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
461349	2025-01-06 12:49:49	2460682.03459	18.844	0.131	19.55	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	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	Bibcode	Unreal	Auto classification
241032	2025-01-12 15:38:01	ALeRCE	A. Munoz-Arancibia,F.E. Bauer,G. Pignata et al.	ALeRCE	ZTF	11:44:47.403	+19:46:24.38	2025-01-12 11:03:07.001	17.1282	g-ZTF		PSN	SDSS J114447.79+194624.2	ZTF25aabskal	ZTF		Early SN candidate (g-rise > 0.92+-0.01 mag/day) classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25aabskal		N
240772	2025-01-08 10:01:58	GOTO_bot	A. Kumar,D. O'Neill,K. Ackley et al.	GOTO	GOTO	11:44:47.405	+19:46:24.55	2025-01-08 02:29:54.240	17.22	L-GOTO		Other		GOTO25ef	GOTO				N
240660	2025-01-06 15:52:03	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	11:44:47.418	+19:46:24.57	2025-01-06 12:49:48.576	18.844	orange-ATLAS		PSN		ATLAS25agn	ATLAS			2025TNSTR..65....1T	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20114

2025-01-09 16:59:14

ePESSTOplus_Bot1

F.Ragosta, I.Salmaso, S.Benetti, E. A. Zimmerman on behalf of ePESSTO+

ePESSTO+

SN II

0.03

1

ePESSTO+

2025TNSCR.129....1R

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
20114	2025-01-09 07:22:02	ESO-NTT / EFOSC2-NTT	899	F.Ragosta, I.Salmaso	S.Benetti	ePESSTO+	tns_2025ei_2025-01-09_07-22-02_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2025ei_2025-01-09_07-22-02_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	Object

20058

2025-01-07 16:29:35

Jason Hinkle

Jason Hinkle (UH/IfA) on behalf of SCAT

SCAT

SN II

0.02825

1

SCAT

Blue continuum with broad H and He features. The redshift is from the archival SDSS host spectrum.

2025TNSCR..99....1H

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
20058	2025-01-07 15:51:10	UH88 / SNIFS	1200	Hinkle		SCAT	tns_2025ei_2025-01-07_15-51-10_UH88_SNIFS_SCAT.dat		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 241032 of Group ZTF
Previous RA, DEC: 11:44:47.418, +19:46:24.57 (176.197575, +19.7734925)
Updated RA, DEC: 11:44:47.403, +19:46:24.38 (176.1975142, 19.7734393)

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