2026muw | Transient Name Server

RA/DEC (2000)

21:23:29.961 -07:40:49.04

320.874838 -7.680289

Type

SN IIn

Redshift

0.061582

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2026-05-14 09:06:33.984

TNS AT

Y

Public

Y

Discovery Mag

19.159

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
	23847	2026-05-24 09:45:46	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2026muw_2026-05-24_09-45-45.844308_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

L-GOTO

GOTO-S_GOTO-3

2026-05-05 18:22:46 - 2026-05-05 18:22:46

2461166.265808 - 2461166.265808

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
585008	2026-05-05 18:22:46	2461166.265808			19.4	ABMag	L-GOTO	GOTO-S_GOTO-3	180		[Last non detection]

cyan-ATLAS

ATLAS-CHL_ATLAS-04

2026-05-14 09:06:34 - 2026-05-14 09:06:34

2461174.87956 - 2461174.87956

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
583139	2026-05-14 09:06:34	2461174.87956	19.159	0.146	19.44	ABMag	cyan-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot

L-GOTO

GOTO-N_GOTO-1

2026-05-24 04:14:05 - 2026-05-24 04:14:05

2461184.676452 - 2461184.676452

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
585009	2026-05-24 04:14:05	2461184.676452	18.32	0.03		ABMag	L-GOTO	GOTO-N_GOTO-1	360

BG-q-BlackGem

BG3_BlackGEM-Cam3

2026-05-12 08:34:40 - 2026-05-19 08:44:33

2461172.8574074 - 2461179.8642708

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
583959	2026-05-19 08:44:33	2461179.8642708	18.12	0.04	20.51	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic
583958	2026-05-12 08:34:40	2461172.8574074			19.71	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic	[Last non detection]

i-ZTF

P48_ZTF-Cam

2026-05-23 11:15:45 - 2026-05-23 11:15:45

2461183.9692708 - 2461183.9692708

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
584875	2026-05-23 11:15:45	2461183.9692708	18.1543	0.0637138		ABMag	i-ZTF	P48_ZTF-Cam

r-ZTF

P48_ZTF-Cam

2026-04-24 11:48:30 - 2026-04-24 11:48:30

2461154.9920139 - 2461154.9920139

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
584874	2026-04-24 11:48:30	2461154.9920139	20.0307	0.154112		ABMag	r-ZTF	P48_ZTF-Cam

orange-ATLAS

ATLAS-MLO_ATLAS-01

2026-05-12 14:50:06 - 2026-05-12 14:50:06

2461173.11812 - 2461173.11812

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
583138	2026-05-12 14:50:06	2461173.11812			18.99	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	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
305080	2026-05-24 08:55:20	GOTO_bot	G. Ramsay, K. Ackley, M. Dyer et al.	GOTO	GOTO	21:23:29.980	-07:40:48.83	2026-05-24 04:14:05.280	18.32	L-GOTO		Other		GOTO26fcu	GOTO				N
305020	2026-05-23 14:47:07	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	21:23:29.987	-07:40:49.28	2026-04-24 11:48:30.000	20.0307	r-ZTF		PSN		ZTF26aaygtnj	ZTF				N
304591	2026-05-19 15:43:02	BlackGEM_Bot1	H. Tranin, F. Stoppa, D. Pieterse et al.	BlackGEM	BlackGEM	21:23:29.961	-07:40:49.04	2026-05-19 08:44:33.000	18.12	BG-q-BlackGem		PSN		BGEM J212329.96-074049.0	BlackGEM				N
304023	2026-05-17 05:28:51	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	21:23:29.976	-07:40:49.17	2026-05-14 09:06:33.984	19.159	cyan-ATLAS		PSN		ATLAS26fry	ATLAS			2026TNSTR2137....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

23843

2026-05-26 20:29:36

ZTF_Bot1

J. Sollerman, J. Castaneda Jaimes, C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF)

ZTF

SN IIn

0.061582

1

ZTF

2026TNSCR2296....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
23847	2026-05-24 09:45:46	P60 / SEDM	2700	SEDmRobot		ZTF	tns_2026muw_2026-05-24_09-45-45.844308_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 304591 of Group BlackGEM
Previous RA, DEC: 21:23:29.976, -07:40:49.17 (320.874900769, -7.68032576923)
Updated RA, DEC: 21:23:29.961, -07:40:49.04 (320.874838, -7.680289)

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