2026acjs | Transient Name Server

RA/DEC (2000)

18:54:32.379 -62:51:31.29

283.634910833 -62.8586925

Type

SN II

Redshift

0.0155

Discovery Report Classification Report

Related AstroNotes: 2026-278

Reporting Group

GOTO

Discovering Data Source

GOTO

Discovery Date

2026-09-20 09:28:57.504

TNS AT

Y

Public

Y

Host Name

PGC093566

Comments

[Object cross-matched with PGC093566]

Discovery Mag

17.87

Filter

L-GOTO

Reporter/s

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

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

GOTO-S_GOTO-4_L

▌

GOTO-S_GOTO-3_L

▌

ATLAS-CHL_ATLAS-04_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
	24741	2026-09-21 00:00:00	ANU-2.3m / WiFeS		K. Auchettl (University of Melbourne/UCSC)	L. Rauf (ANU)	Supernova Alliance	tns_2026acjs_2026-09-21_ANU-2.3m_WiFeS_Supernova_Alliance.dat	tns_2026acjs_2026-09-21_ANU-2.3m_WiFeS_Supernova_Alliance.fits	Object			Fit with superfit.
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 z-step: v-step: Remarks Fit with superfit.

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-S_GOTO-4

2026-09-20 09:28:58 - 2026-09-20 09:28:58

2461303.895114 - 2461303.895114

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
620579	2026-09-20 09:28:58	2461303.895114	17.87	0.04		ABMag	L-GOTO	GOTO-S_GOTO-4	180

L-GOTO

GOTO-S_GOTO-3

2026-08-28 13:22:54 - 2026-08-28 13:22:54

2461281.057567 - 2461281.057567

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
620578	2026-08-28 13:22:54	2461281.057567			19.2	ABMag	L-GOTO	GOTO-S_GOTO-3	180		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2026-09-23 04:09:35 - 2026-09-26 01:20:31

2461306.67332 - 2461309.55591

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
621775	2026-09-26 01:20:31	2461309.55591	17.175	0.056	18.6	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot
621774	2026-09-23 04:09:35	2461306.67332			14.99	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	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
324945	2026-09-26 11:29:06	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	18:54:32.379	-62:51:31.29	2026-09-26 01:20:30.624	17.175	orange-ATLAS		PSN		ATLAS26lux	ATLAS				N
324344	2026-09-20 10:48:01	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	18:54:32.345	-62:51:31.44	2026-09-20 09:28:57.504	17.87	L-GOTO		Other		GOTO26kdm	GOTO			2026TNSTR3796....1O	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

24733

2026-09-22 13:04:54

Liana Rauf

L. Rauf (ANU), K. Auchettl (University of Melbourne/UCSC), B. P. Schmidt (ANU), P. Armstrong (ANU), D. Cao (ANU), C. Lidman (ANU), B. Martin (ANU), A. Protheroe (ANU), J. Shi (University of Melbourne), and B. E. Tucker (ANU)

Supernova Alliance

SN II

0.0155

1

Supernova Alliance

Hot blue continuum Consistent with a young SN II with very broad underlying Halpha and the Flash features at ~4600A typically attributed to He II, C IV‬, and N III.

2026TNSCR3842....1R

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
24741	2026-09-21 00:00:00	ANU-2.3m / WiFeS		K. Auchettl (University of Melbourne/UCSC)	L. Rauf (ANU)	Supernova Alliance	tns_2026acjs_2026-09-21_ANU-2.3m_WiFeS_Supernova_Alliance.dat	tns_2026acjs_2026-09-21_ANU-2.3m_WiFeS_Supernova_Alliance.fits	Object			Fit with superfit.

Comments

Object coordinates updated

Object coordinates updated according to AT-report 324945 of Group ATLAS
Previous RA, DEC: 18:54:32.345, -62:51:31.44 (283.634771, -62.858732)
Updated RA, DEC: 18:54:32.379, -62:51:31.29 (283.634910833, -62.8586925)

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