2025ulq | Transient Name Server

RA/DEC (2000)

00:19:16.398 -17:31:50.25

4.81832485 -17.5306236375

Type

SN Ia

Redshift

0.074

Discovery Report Classification Report

Related AstroNotes: 2025-269

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2025-08-16 09:31:32.998

TNS AT

Y

Public

Y

Discovery Mag

20.5252

Filter

g-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	Assoc. Groups	End prop. period	Remarks
	21878	2025-08-27 08:54:03	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025ulq_2025-08-27_08-54-03.457119_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
	21881	2025-08-27 04:35:49	NOT / ALFOSC		M. Pursiainen, I. Worssam	M. Pursiainen, I. Worssam	GOTO	tns_2025ulq_2025-08-27_04-35-49_NOT_ALFOSC_GOTO.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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2025-08-13 02:42:56 - 2025-08-21 00:54:08

2460900.61315 - 2460908.53759

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
510816	2025-08-21 00:54:08	2460908.53759	18.918	0.142	19.48	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot
510815	2025-08-13 02:42:56	2460900.61315			18.21	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

L-GOTO

GOTO-S_GOTO-3

2025-08-17 15:42:07 - 2025-08-17 15:42:07

2460905.154254 - 2460905.154254

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
511729	2025-08-17 15:42:07	2460905.154254	19.98	0.17		ABMag	L-GOTO	GOTO-S_GOTO-3	180

L-GOTO

GOTO-N_GOTO-2

2025-08-14 03:11:29 - 2025-08-14 03:11:29

2460901.632978 - 2460901.632978

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
511728	2025-08-14 03:11:29	2460901.632978			18.3	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2025-08-16 08:33:05 - 2025-08-18 09:03:05

2460903.8563079 - 2460905.8771412

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
513907	2025-08-18 09:03:05	2460905.8771412	19.7648	0.142014	20.4419	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink
510078	2025-08-16 08:33:05	2460903.8563079			20.2336	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]
513906	2025-08-16 08:33:05	2460903.8563079			20.2336	ABMag	r-ZTF	P48_ZTF-Cam	30	Robot	[Last non detection] Data provided by ZTF, classified by Fink

g-ZTF

P48_ZTF-Cam

2025-08-16 09:31:33 - 2025-08-18 10:20:17

2460903.8969097 - 2460905.9307523

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
510080	2025-08-18 10:20:17	2460905.9307523	19.5442	0.113187		ABMag	g-ZTF	P48_ZTF-Cam
510079	2025-08-16 09:31:33	2460903.8969097	20.5252	0.199666		ABMag	g-ZTF	P48_ZTF-Cam

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
268461	2025-08-29 18:18:38	Fink	Julien Peloton,Anais Moller,Emille E. O. Ishida on behalf of the Fink broker et al.	Fink	ZTF	00:19:16.398	-17:31:50.25	2025-08-18 09:03:05.000	19.7648	r-ZTF		PSN		ZTF25abjiyiz	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF25abjiyiz		N
267343	2025-08-23 15:50:40	GOTO_bot	A. Kumar,D. O'Neill,K. Ackley et al.	GOTO	GOTO	00:19:16.397	-17:31:50.16	2025-08-17 15:42:07.200	19.98	L-GOTO		Other		GOTO25gff	GOTO				N
266874	2025-08-21 08:30:05	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	00:19:16.393	-17:31:50.10	2025-08-21 00:54:07.776	18.918	wide-ATLAS		PSN		ATLAS25kbw	ATLAS				N
266502	2025-08-18 11:59:59	Fritz	Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al.	ZTF	ZTF	00:19:16.400	-17:31:49.85	2025-08-16 09:31:32.998	20.5252	g-ZTF		PSN		ZTF25abjiyiz	ZTF			2025TNSTR3262....1S	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

21881

2025-08-27 11:28:45

David O'Neill

M. Pursiainen, I. Worssam, D. O'Neill, J. Lyman, T. Killestein, K. Ackley, M. Dyer, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, A. Kumar on behalf of GOTO collaboration

GOTO

SN Ia

0.074

1

GOTO

Classified as a normal Type Ia at peak using SNID-SAGE.

2025TNSCR3404....1P

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
21881	2025-08-27 04:35:49	NOT / ALFOSC		M. Pursiainen, I. Worssam	M. Pursiainen, I. Worssam	GOTO	tns_2025ulq_2025-08-27_04-35-49_NOT_ALFOSC_GOTO.dat		Object

21878

2025-08-27 09:47:08

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

0.074

1

ZTF

2025TNSCR3406....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
21878	2025-08-27 08:54:03	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025ulq_2025-08-27_08-54-03.457119_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 268461 of Group ZTF
Previous RA, DEC: 00:19:16.400, -17:31:49.85 (4.8183351, -17.5305143)
Updated RA, DEC: 00:19:16.398, -17:31:50.25 (4.81832485, -17.5306236375)

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