2025nn | Transient Name Server

RA/DEC (2000)

07:17:39.340 +43:49:03.12

109.413916845 +43.817532949

Type

SN Ia-91bg-like

Redshift

0.05

Discovery Report Classification Report

Related AstroNotes: 2025-44

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-01-11 08:10:27.001

TNS AT

Public

Discovery Mag

19.7685

Filter

r-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
	20279	2025-01-26 00:00:00	FLWO-1.5m / FAST		Gilbert Esquerdo, Perry Berlind	Jessica Mink, S. Karthik Yadavalli, Kaylee de Soto, Yize Dong	YSE	tns_2025nn_2025-01-26_FLWO-1.5m_FAST_YSE.txt	tns_2025nn_2025-01-26_FLWO-1.5m_FAST_YSE.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
	20272	2025-01-25 04:50:59	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025nn_2025-01-25_04-50-58.914726_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

w-P1

PS2_GPC2

2025-01-19 09:04:01 - 2025-01-19 09:04:01

2460694.87779 - 2460694.87779

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464188	2025-01-19 09:04:01	2460694.87779	18.65	0.04	22	ABMag	w-P1	PS2_GPC2	45	Robot

L-GOTO

GOTO-N_GOTO-1

2025-01-19 04:16:17 - 2025-01-24 20:13:51

2460694.677973 - 2460700.342955

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
464391	2025-01-24 20:13:51	2460700.342955	18.49	0.09		ABMag	L-GOTO	GOTO-N_GOTO-1	180
464390	2025-01-19 04:16:17	2460694.677973			18.7	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-01-11 08:10:27 - 2025-01-16 09:11:59

2460686.8405903 - 2460691.8833218

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462449	2025-01-16 09:11:59	2460691.8833218	18.8307	0.121139		ABMag	r-ZTF	P48_ZTF-Cam
462448	2025-01-11 08:10:27	2460686.8405903	19.7685	0.303453		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-01-11 05:43:54 - 2025-01-11 05:43:54

2460686.7388194 - 2460686.7388194

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462447	2025-01-11 05:43:54	2460686.7388194			19.2609	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-01-18 05:42:43 - 2025-01-18 05:42:43

2460693.738 - 2460693.738

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462871	2025-01-18 05:42:43	2460693.738	19.023	0.197	19.13	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-01-16 10:42:13 - 2025-01-16 10:42:13

2460691.94598 - 2460691.94598

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
462870	2025-01-16 10:42:13	2460691.94598			18.91	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	AT Type	Internal name	Assoc. Groups	ADS Bibcode	Unreal
242316	2025-01-25 08:41:12	GOTO_bot	D. O'Neill,G. Ramsay,K. Ackley et al.	GOTO	GOTO	07:17:39.356	+43:49:02.58	2025-01-24 20:13:50.880	18.49	L-GOTO	Other	GOTO25mq	GOTO		N
242228	2025-01-23 23:48:41	PS1_Bot1	K. C. Chambers,T. de Boer,J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	07:17:39.340	+43:49:03.12	2025-01-19 09:04:01.056	18.65	w-P1	PSN	PS25ih	Pan-STARRS		N
241364	2025-01-18 14:33:43	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	07:17:39.335	+43:49:02.81	2025-01-18 05:42:43.200	19.023	orange-ATLAS	PSN	ATLAS25amh	ATLAS		N
241184	2025-01-16 12:49:45	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	07:17:39.335	+43:49:03.15	2025-01-11 08:10:27.001	19.7685	r-ZTF	PSN	ZTF25aacaoby	ZTF	2025TNSTR.211....1S	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

20279

2025-01-30 23:35:51

Yize Dong

S. Karthik Yadavalli (Harvard/CfA), Yize Dong (Harvard/CfA), Kaylee de Soto (Harvard/CfA), V. Ashley Villar (Harvard/CfA), Matthew Grayling (Cambridge), Erin Hayes (Cambridge), Kaisey S. Mandel (Cambridge), Diego Farias (DARK/NBI), Christa Gall (DARK/NBI), Aprajita Hajela (DARK/NBI), Jens Hjorth (DARK/NBI), Luca Izzo (DARK/NBI), Danial Langeroodi (DARK/NBI), Aidan Sedgewick (DARK/NBI), Radek Wojtak, Sandra Raimundo (DARK/NBI+ U. Southampton), Charlie Kilpatrick (Northwestern), Steven Smartt (QUB/Oxford), Ken W. Smith (QUB/Oxford), Charlotte Angus (QUB), David Coulter (STScI), Justin Pierel (STScI), Armin Rest (STScI), Matthew Seibert (STScI), Prasiddha Arunachalam (UC Santa Cruz), Kyle W. Davis (UC Santa Cruz), Ryan J. Foley (UC Santa Cruz), Rav Kaur (UC Santa Cruz), Phillip Macias (UC Santa Cruz), Kishore Patra (UC Santa Cruz), César Rojas-Bravo (UC Santa Cruz), Enrico Ramirez-Ruiz (UC Santa Cruz), Kirsty Taggart (UC Santa Cruz), Ken C. Chambers (U Hawaii), David Jones (U Hawaii), Mark E. Huber (U Hawaii), Eugene A. Magnier (U Hawaii), R. J. Wainscoat (U Hawaii), Henna Abunemeh (UIUC), Nicholas Earl (UIUC), K. Decker French (UIUC), Ayan Mitra (UIUC), Tanner Murphey (UIUC), Jack O’Brien (UIUC), Haille Perkins (UIUC), Gautham Narayan (UIUC), Margaret Shepherd (UIUC), Margaret Verrico (UIUC), Amanda Wasserman (UIUC), Maria Drout (U. Toronto), Vivienne Baldasarre (Washington State University), Alexander Messick (Washington State University), Sandra Raimundo (U. Southampton), Katie Auchettl (University of Melbourne), Stephen Thorpe (Stockholm University), Yen-Chen Pan (National Central University)

YSE

SN Ia-91bg-like

0.05

Add

YSE

The best match from SNID (Blondin & Tonry 2007, ApJ, 666, 1024) is a Type Ia-91bg supernova at redshift near 0.05.

2025TNSCR.423....1Y

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
20279	2025-01-26 00:00:00	FLWO-1.5m / FAST		Gilbert Esquerdo, Perry Berlind	Jessica Mink, S. Karthik Yadavalli, Kaylee de Soto, Yize Dong	YSE	tns_2025nn_2025-01-26_FLWO-1.5m_FAST_YSE.txt	tns_2025nn_2025-01-26_FLWO-1.5m_FAST_YSE.fits	Object

20272

2025-01-30 21:54:21

ZTF_Bot1

S. Covarrubias, M. Chu, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SN Ia

0.055

Add

ZTF

2025TNSCR.424....1C

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
20272	2025-01-25 04:50:59	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2025nn_2025-01-25_04-50-58.914726_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 242228 of Group Pan-STARRS
Previous RA, DEC: 07:17:39.335, +43:49:03.15 (109.4138953, +43.8175414)
Updated RA, DEC: 07:17:39.340, +43:49:03.12 (109.413916845, 43.817532949)

SN 2025nn

Spectra

Light curves

Comments

Object coordinates updated