2026bgd | Transient Name Server

RA/DEC (2000)

13:20:59.037 -43:40:35.69

200.245988 -43.676581

Type

SN Ia

Redshift

0.004

Discovery Report Classification Report

Related AstroNotes: 2026-15, 2026-16

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2026-01-24 08:29:44.736

TNS AT

Y

Public

Y

Discovery Mag

18.208

Filter

cyan-ATLAS

Reporter/s

J. Tonry, L. Denneau, H. Weiland (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, A. J. Smith (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (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
	22872	2026-01-27 14:24:00	ANU-2.3m / WiFeS	600	Robotic	C. Lidman	None	tns_2026bgd_2026-01-27.6_ANU-2.3m_WiFeS_None.dat	tns_2026bgd_2026-01-27.6_ANU-2.3m_WiFeS_None.fits	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

L-GOTO

GOTO-S_GOTO-4

2026-01-24 17:14:53 - 2026-01-24 17:14:53

2461065.218673 - 2461065.218673

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553868	2026-01-24 17:14:53	2461065.218673	18.28	0.04		ABMag	L-GOTO	GOTO-S_GOTO-4	180

L-GOTO

GOTO-S_GOTO-3

2026-01-07 16:14:44 - 2026-01-07 16:14:44

2461048.1769 - 2461048.1769

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553867	2026-01-07 16:14:44	2461048.1769			19.5	ABMag	L-GOTO	GOTO-S_GOTO-3	135		[Last non detection]

cyan-ATLAS

ATLAS-CHL_ATLAS-04

2026-01-23 08:57:47 - 2026-01-24 08:29:45

2461063.87346 - 2461064.85399

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553449	2026-01-24 08:29:45	2461064.85399	18.208	0.088	19.19	ABMag	cyan-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot
553448	2026-01-23 08:57:47	2461063.87346			18.79	ABMag	cyan-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

BG-q-BlackGem

BG3_BlackGEM-Cam3

2026-01-18 06:51:48 - 2026-01-28 07:08:52

2461058.7859722 - 2461068.7978241

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
554443	2026-01-28 07:08:52	2461068.7978241	17.08	0.03	20.96	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic
554442	2026-01-18 06:51:48	2461058.7859722			20.87	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic	[Last non detection]

Other-

Other_Other

2025-07-02 00:16:28 - 2026-02-05 09:03:43

2460858.51144 - 2461076.87758

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
556354	2026-02-05 09:03:43	2461076.87758	16.2		18.7	VegaMag	Other-	Other_Other	60	Robot	MASTER-OAFA
556353	2026-02-05 08:23:32	2461076.84968	16.2		19.1	VegaMag	Other-	Other_Other	60	Robot	MASTER-OAFA
556352	2025-07-02 00:16:28	2460858.51144			19.9	VegaMag	Other-	Other_Other	180	Robot	[Last non detection] MASTER-OAFA

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
290203	2026-02-07 18:03:37	MASTER	Ya.Kechin, V.Lipunov, E.Gorbovskoy et al.	MASTER	MASTER	13:20:59.040	-43:40:35.50	2026-02-05 08:23:32.352	16.2	Other-		PSN		MASTER OT J132059.04-434035.5	MASTER				N
289246	2026-01-28 19:25:04	BlackGEM_Bot1	G. Ramsay, H. Tranin, F. Stoppa et al.	BlackGEM	BlackGEM	13:20:59.037	-43:40:35.69	2026-01-28 07:08:52.000	17.08	BG-q-BlackGem		PSN		BGEM J132059.04-434035.7	BlackGEM				N
288953	2026-01-25 21:35:58	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	13:20:59.020	-43:40:35.93	2026-01-24 17:14:53.088	18.28	L-GOTO		Other		GOTO26adi	GOTO				N
288755	2026-01-24 20:37:23	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	13:20:59.018	-43:40:35.83	2026-01-24 08:29:44.736	18.208	cyan-ATLAS		PSN		ATLAS26bca	ATLAS			2026TNSTR.309....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

22871

2026-01-27 22:43:20

Chris Lidman

C. Lidman (ANU), B. P. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), B. Martin (ANU), A. Moller (Swinburne), L. Rauf (ANU), and B. E. Tucker (ANU)

None

SN Ia

0.004

1

Classified with Superfit. Similar to SN 86g a few days before max. Redshift from SN.

2026TNSCR.366....1L

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
22872	2026-01-27 14:24:00	ANU-2.3m / WiFeS	600	Robotic	C. Lidman	None	tns_2026bgd_2026-01-27.6_ANU-2.3m_WiFeS_None.dat	tns_2026bgd_2026-01-27.6_ANU-2.3m_WiFeS_None.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 289246 of Group BlackGEM
Previous RA, DEC: 13:20:59.018, -43:40:35.83 (200.24591, -43.67662)
Updated RA, DEC: 13:20:59.037, -43:40:35.69 (200.245988, -43.676581)

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