2025qkw | Transient Name Server

RA/DEC (2000)

23:08:32.063 -12:17:32.51

347.133594265 -12.2923651973

Type

SN Ia

Redshift

0.09

Discovery Report Classification Report

Related AstroNotes: 2025-220

Reporting Group

ALeRCE

Discovering Data Source

ZTF

Discovery Date

2025-07-05 10:27:46.002

TNS AT

Y

Public

Y

Host Name

2dFGRS TGS871Z177

Discovery Mag

19.9324

Filter

g-ZTF

Reporter/s

F. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, A. Mourao, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, B. Gamboa, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, E. Pizarro, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker

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
	21571	2025-07-18 06:09:11	ESO-NTT / EFOSC2-NTT	950	G. Csoernyei	G. Csoernyei	None	tns_2025qkw_2025-07-18_06-09-11.365_ESO-NTT_EFOSC2-NTT_None.asci	tns_2025qkw_2025-07-18_06-09-11.365_ESO-NTT_EFOSC2-NTT_None.fits	Object			Quick-reduction spectrum
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 Quick-reduction spectrum

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-07-09 04:18:20 - 2025-07-09 04:18:20

2460865.6794 - 2460865.6794

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
502486	2025-07-09 04:18:20	2460865.6794	19.007	0.16	19.4	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot

L-GOTO

GOTO-S_GOTO-3

2025-07-18 15:38:05 - 2025-07-18 15:38:05

2460875.151454 - 2460875.151454

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
503328	2025-07-18 15:38:05	2460875.151454	18.71	0.08		ABMag	L-GOTO	GOTO-S_GOTO-3	180

L-GOTO

GOTO-N_GOTO-2

2025-07-02 04:41:40 - 2025-07-02 04:41:40

2460858.695596 - 2460858.695596

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
503327	2025-07-02 04:41:40	2460858.695596			19.1	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

w-P1

PS2_GPC2

2025-07-04 13:30:31 - 2025-07-04 13:30:31

2460861.06286 - 2460861.06286

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
501749	2025-07-04 13:30:31	2460861.06286	20.22	0.05	22	ABMag	w-P1	PS2_GPC2	45	Robot

orange-ATLAS

ATLAS-STH_ATLAS-03

2025-07-08 00:27:42 - 2025-07-08 00:27:42

2460864.51924 - 2460864.51924

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
502485	2025-07-08 00:27:42	2460864.51924			19.1	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot	[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-07-02 11:02:50 - 2025-07-02 11:02:50

2460858.9603009 - 2460858.9603009

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
501050	2025-07-02 11:02:50	2460858.9603009			20.6002	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF

g-ZTF

P48_ZTF-Cam

2025-07-05 10:27:46 - 2025-07-05 10:29:08

2460861.9359491 - 2460861.9368981

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
501052	2025-07-05 10:29:08	2460861.9368981	19.8647	0.135875	20.3302	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF
501051	2025-07-05 10:27:46	2460861.9359491	19.9324	0.175933	20.3507	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF

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
262932	2025-07-18 18:14:52	GOTO_bot	A. Kumar, G. Ramsay, K. Ackley et al.	GOTO	GOTO	23:08:32.047	-12:17:32.51	2025-07-18 15:38:05.280	18.71	L-GOTO		Other		GOTO25fay	GOTO				N
262471	2025-07-14 16:41:32	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	23:08:32.039	-12:17:32.49	2025-07-09 04:18:20.160	19.007	wide-ATLAS		PSN		ATLAS25hpa	ATLAS				N
262016	2025-07-10 14:38:40	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	23:08:32.063	-12:17:32.51	2025-07-04 13:30:31.104	20.22	w-P1		PSN		PS25etz	Pan-STARRS				N
261672	2025-07-05 18:33:32	ALeRCE	F. Forster, F.E. Bauer, G. Pignata et al.	ALeRCE	ZTF	23:08:32.056	-12:17:32.59	2025-07-05 10:27:46.002	19.9324	g-ZTF		PSN	2dFGRS TGS871Z177	ZTF25aazvkec	ZTF		Early SN candidate (g-rise > 0.14+-0.06 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/ZTF25aazvkec	2025TNSTR2569....1F	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

21571

2025-07-19 21:24:11

Geza Csornyei

G. Csoernyei, M. Vioque, M. Mirabile (ESO), G. Fernandes Goncalves (Federal University of Technology), L. Hauer (University of Vienna), P. M. Lequizamon Pineda (Università degli Studi di Padova), A. Moore (University College Cork), E. Nilson (Lund University), A. Pisapia (INAF-OAS), J. Willingham (Macquarie University)

None

SN Ia

0.09

1

GELATO finds good matches with 1998bu close to maximum light. Redshift is based on template matching.

2025TNSCR2777....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
21571	2025-07-18 06:09:11	ESO-NTT / EFOSC2-NTT	950	G. Csoernyei	G. Csoernyei	None	tns_2025qkw_2025-07-18_06-09-11.365_ESO-NTT_EFOSC2-NTT_None.asci	tns_2025qkw_2025-07-18_06-09-11.365_ESO-NTT_EFOSC2-NTT_None.fits	Object			Quick-reduction spectrum

Comments

Object coordinates updated

Object coordinates updated according to AT-report 262016 of Group Pan-STARRS
Previous RA, DEC: 23:08:32.056, -12:17:32.59 (347.1335664, -12.29238495)
Updated RA, DEC: 23:08:32.063, -12:17:32.51 (347.133594265, -12.2923651973)

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