2025qcu | Transient Name Server

RA/DEC (2000)

21:55:13.832 +23:38:22.55

328.8076317 +23.6395981

Type

SN Ia

Redshift

0.064

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-07-01 11:33:38.016

TNS AT

Y

Public

Y

Discovery Mag

18.737

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

▌

LAST_LAST-Cam_Clear

▌

GOTO-N_GOTO-2_L

▌

P48_ZTF-Cam_g

▌

ATLAS-HKO_ATLAS-02_orange

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
	21477	2025-07-06 07:38:59	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025qcu_2025-07-06_07-38-59.349119_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
	21464	2025-07-03 12:37:57	UH88 / SNIFS	1800	Desai		SCAT	tns_2025qcu_2460860.02635_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

Clear-

LAST_LAST-Cam

2025-06-02 23:04:26 - 2025-07-21 23:32:36

2460829.46141 - 2460878.48097

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
504088	2025-07-21 23:32:36	2460878.48097	18.65			ABMag	Clear-	LAST_LAST-Cam	380
504087	2025-06-02 23:04:26	2460829.46141			20.55	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-N_GOTO-2

2025-07-03 23:43:06 - 2025-07-04 00:51:01

2460860.488265 - 2460860.535429

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
500698	2025-07-04 00:51:01	2460860.535429	18.4	0.17		ABMag	L-GOTO	GOTO-N_GOTO-2	360
500697	2025-07-03 23:43:06	2460860.488265			18.1	ABMag	L-GOTO	GOTO-N_GOTO-2	360		[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-06-28 10:55:41 - 2025-07-05 08:30:11

2460854.9553356 - 2460861.854294

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
500947	2025-07-05 08:30:11	2460861.854294	18.1128	0.0513521		ABMag	g-ZTF	P48_ZTF-Cam
500946	2025-06-29 09:53:53	2460855.912419	19.0529	0.082814		ABMag	g-ZTF	P48_ZTF-Cam
500945	2025-06-28 10:55:41	2460854.9553356			19.5343	ABMag	g-ZTF	P48_ZTF-Cam			[Last non detection]

orange-ATLAS

ATLAS-HKO_ATLAS-02

2025-06-27 13:34:33 - 2025-07-01 11:33:38

2460854.06566 - 2460857.98169

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
500388	2025-07-01 11:33:38	2460857.98169	18.737	0.095	19.56	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot
500387	2025-06-27 13:34:33	2460854.06566			18.83	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
263328	2025-07-22 05:16:53	LAST_Bot1	E. A. Zimmerman (WIS), R. Konno (WIS), A. Horowicz (WIS) et al.	LAST	LAST	21:55:13.857	+23:38:22.09	2025-07-21 23:32:35.808	18.65	Clear-		PSN			LAST				N
261587	2025-07-05 10:59:34	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	21:55:13.832	+23:38:22.55	2025-06-29 09:53:53.001	19.0529	g-ZTF		PSN		ZTF25aaymgxm	ZTF				N
261450	2025-07-04 07:19:10	GOTO_bot	A. Kumar, G. Ramsay, K. Ackley et al.	GOTO	GOTO	21:55:13.839	+23:38:22.29	2025-07-04 00:51:01.152	18.4	L-GOTO		Other		GOTO25eot	GOTO				N
261284	2025-07-02 20:26:54	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	21:55:13.834	+23:38:22.69	2025-07-01 11:33:38.016	18.737	orange-ATLAS		PSN		ATLAS25guc	ATLAS			2025TNSTR2520....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

21477

2025-07-06 08:31:48

ZTF_Bot1

C. Fremling, D. Neill, Y. Sharma on behalf of the SEDM Team (Caltech) and the Zwicky Transient Facility (ZTF) based on SNIascore

ZTF

SN Ia

0.064

1

ZTF

2025TNSCR2587....1F

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
21477	2025-07-06 07:38:59	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025qcu_2025-07-06_07-38-59.349119_P60_SEDM_ZTF.ascii		Object

21464

2025-07-03 13:54:53

Dhvanil Desai

Dhvanil Desai (on behalf of the SCAT team)

SCAT

SN Ia

0.064

1

SCAT

Redshift estimate from SNID.

2025TNSCR2548....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
21464	2025-07-03 12:37:57	UH88 / SNIFS	1800	Desai		SCAT	tns_2025qcu_2460860.02635_UH88_SNIFS_SCAT.dat		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 261587 of Group ZTF
Previous RA, DEC: 21:55:13.834, +23:38:22.69 (328.807640909, +23.6396363636)
Updated RA, DEC: 21:55:13.832, +23:38:22.55 (328.8076317, +23.6395981)

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