2025ian | Transient Name Server

RA/DEC (2000)

20:58:11.509 +14:55:29.66

314.5479561 +14.9249053

Type

SN Ia

Redshift

0.05

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-04-22 08:50:45.312

TNS AT

Y

Public

Y

Discovery Mag

17.677

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, J. Tweddle (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
	20887	2025-04-23 09:48:05	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025ian_2025-04-23_09-48-04.919796_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

Clear-

LAST_LAST-Cam

2024-07-05 21:47:29 - 2025-05-31 23:00:12

2460497.40798 - 2460827.45847

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
493169	2025-05-31 23:00:12	2460827.45847	19.34			ABMag	Clear-	LAST_LAST-Cam	400
493168	2024-07-05 21:47:29	2460497.40798			21.1	ABMag	Clear-	LAST_LAST-Cam	3200		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-04-22 08:50:45 - 2025-04-22 08:50:45

2460787.86858 - 2460787.86858

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
483432	2025-04-22 08:50:45	2460787.86858	17.677	0.095	18.48	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot

L-GOTO

GOTO-N_GOTO-1

2024-12-07 20:00:24 - 2025-05-03 03:57:06

2460652.333611 - 2460798.664653

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
485716	2025-05-03 03:57:06	2460798.664653	17.67	0.02		ABMag	L-GOTO	GOTO-N_GOTO-1	720
485715	2024-12-07 20:00:24	2460652.333611			19.1	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-04-20 10:56:08 - 2025-04-22 11:35:20

2460785.9556481 - 2460787.9828704

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
483469	2025-04-22 11:35:20	2460787.9828704	17.6959	0.0578808		ABMag	r-ZTF	P48_ZTF-Cam
483468	2025-04-20 10:56:08	2460785.9556481	17.8897	0.0752215		ABMag	r-ZTF	P48_ZTF-Cam

g-ZTF

P48_ZTF-Cam

2025-04-11 11:46:57 - 2025-04-11 11:46:57

2460776.9909375 - 2460776.9909375

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
483467	2025-04-11 11:46:57	2460776.9909375			19.5046	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-MLO_ATLAS-01

2025-04-15 15:06:43 - 2025-04-15 15:06:43

2460781.12966 - 2460781.12966

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
483431	2025-04-15 15:06:43	2460781.12966			18.8	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot	[Last non detection]

Other-

Other_Other

2023-08-09 21:12:42 - 2025-05-04 03:39:45

2460166.38382 - 2460799.6526

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
486539	2025-05-04 03:39:45	2460799.6526	18.1		18.6	VegaMag	Other-	Other_Other	60	Robot	MASTER-SAAO
486538	2025-05-04 03:25:42	2460799.64285	17.9		18.6	VegaMag	Other-	Other_Other	60	Robot	MASTER-SAAO
486537	2023-08-09 21:12:42	2460166.38382			19.1	VegaMag	Other-	Other_Other	180	Robot	[Last non detection] MASTER-SAAO

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
257505	2025-06-01 01:47:04	LAST_Bot1	E. A. Zimmerman (WIS),R. Konno (WIS),A. Horowicz (WIS) et al.	LAST	LAST	20:58:11.569	+14:55:28.97	2025-05-31 23:00:11.808	19.34	Clear-		PSN			LAST				N
253906	2025-05-04 08:55:08	MASTER	Ya.Kechin,V.Lipunov,E.Gorbovskoy et al.	MASTER	MASTER	20:58:11.500	+14:55:28.10	2025-05-04 03:25:42.240	17.9	Other-		PSN		MASTER OT J205811.50+145528.1	MASTER				N
253484	2025-05-03 08:15:19	GOTO_bot	G. Ramsay,D. O'Neill,K. Ackley et al.	GOTO	GOTO	20:58:11.512	+14:55:29.58	2025-05-03 03:57:05.760	17.67	L-GOTO		Other		GOTO25cgc	GOTO				N
252315	2025-04-22 16:27:01	Fritz	Jacob Wise (LJMU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	20:58:11.509	+14:55:29.66	2025-04-20 10:56:07.995	17.8897	r-ZTF		PSN		ZTF25aanmgrm	ZTF				N
252299	2025-04-22 13:39:56	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	20:58:11.496	+14:55:29.67	2025-04-22 08:50:45.312	17.677	orange-ATLAS		PSN		ATLAS25ebg	ATLAS			2025TNSTR1482....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

20887

2025-04-23 11:00:54

ZTF_Bot1

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

ZTF

SN Ia

0.05

1

ZTF

2025TNSCR1511....1S

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
20887	2025-04-23 09:48:05	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2025ian_2025-04-23_09-48-04.919796_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 252315 of Group ZTF
Previous RA, DEC: 20:58:11.496, +14:55:29.67 (314.547901429, +14.9249085714)
Updated RA, DEC: 20:58:11.509, +14:55:29.66 (314.5479561, +14.9249053)

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