2025abgi | Transient Name Server

RA/DEC (2000)

23:57:27.349 -02:54:22.15

359.3639559 -2.9061519

Type

SN II

Redshift

0.023396

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-10-21 21:06:52.128

TNS AT

Y

Public

Y

Discovery Mag

18.489

Filter

cyan-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), M. R. Alarcón, J. Licandro, P. Nichita (IAC), 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, P. J. Broda (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
	22374	2025-11-08 06:44:52	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025abgi_2025-11-08_06-44-51.665962_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

2025-09-11 00:12:37 - 2025-10-24 18:12:27

2460929.50876 - 2460973.25865

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
526626	2025-10-24 18:12:27	2460973.25865	18.54			ABMag	Clear-	LAST_LAST-Cam	400
526625	2025-09-11 00:12:37	2460929.50876			19.36	ABMag	Clear-	LAST_LAST-Cam	400		[Last non detection]

L-GOTO

GOTO-S_GOTO-3

2025-10-24 11:48:24 - 2025-10-24 11:48:24

2460972.991953 - 2460972.991953

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
526591	2025-10-24 11:48:24	2460972.991953	18.28	0.06		ABMag	L-GOTO	GOTO-S_GOTO-3	180

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-10-21 00:43:38 - 2025-10-21 00:43:38

2460969.5303 - 2460969.5303

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525866	2025-10-21 00:43:38	2460969.5303			19.02	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

cyan-ATLAS

ATLAS-STH_ATLAS-03

2025-10-21 21:06:52 - 2025-10-21 21:06:52

2460970.37977 - 2460970.37977

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
525867	2025-10-21 21:06:52	2460970.37977	18.489	0.114	19.62	ABMag	cyan-ATLAS	ATLAS-STH_ATLAS-03	30	Robot

L-GOTO

GOTO-N_GOTO-1

2025-10-20 23:24:49 - 2025-10-20 23:24:49

2460969.475569 - 2460969.475569

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
526590	2025-10-20 23:24:49	2460969.475569			20.1	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

g-ZTF

P48_ZTF-Cam

2025-10-03 08:35:42 - 2025-11-08 06:00:24

2460951.858125 - 2460987.7502778

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
529580	2025-11-08 06:00:24	2460987.7502778	18.2634	0.0737058		ABMag	g-ZTF	P48_ZTF-Cam
529579	2025-10-29 05:59:51	2460977.7498958	18.13	0.024524		ABMag	g-ZTF	P48_ZTF-Cam
529578	2025-10-03 08:35:42	2460951.858125			19.8191	ABMag	g-ZTF	P48_ZTF-Cam			[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
276012	2025-11-08 06:26:38	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	23:57:27.349	-02:54:22.15	2025-10-29 05:59:50.997	18.13	g-ZTF		PSN		ZTF25acazvii	ZTF				N
274696	2025-10-24 19:03:04	LAST_Bot1	E. O. Ofek (WIS), R. Konno (WIS), E. A. Zimmerman (WIS) et al.	LAST	LAST	23:57:27.393	-02:54:22.17	2025-10-24 18:12:27.360	18.54	Clear-		PSN			LAST				N
274679	2025-10-24 16:04:08	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	23:57:27.336	-02:54:22.41	2025-10-24 11:48:24.480	18.28	L-GOTO		Other		GOTO25jcs	GOTO				N
274336	2025-10-23 01:35:09	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	23:57:27.349	-02:54:22.50	2025-10-21 21:06:52.128	18.489	cyan-ATLAS		PSN		ATLAS25ndf	ATLAS			2025TNSTR4251....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

22373

2025-11-08 19:31:44

ZTF_Bot1

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

ZTF

SN II

0.023396

1

ZTF

2025TNSCR4487....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
22374	2025-11-08 06:44:52	P60 / SEDM	2700	SEDmRobot	auto	ZTF	tns_2025abgi_2025-11-08_06-44-51.665962_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 276012 of Group ZTF
Previous RA, DEC: 23:57:27.349, -02:54:22.50 (359.363952273, -2.90625136364)
Updated RA, DEC: 23:57:27.349, -02:54:22.15 (359.3639559, -2.9061519)

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