2026xg | Transient Name Server

RA/DEC (2000)

12:51:04.978 +08:12:32.44

192.770739924 +8.20901193752

Type

SN IIb

Redshift

0.055

Discovery Report Classification Report

Related AstroNotes: 2026-92

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2026-01-11 12:09:09.996

TNS AT

Y

Public

Y

Discovery Mag

19.9833

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
	23405	2026-03-23 07:24:00	Magellan-Clay / LDSS-3		Yuri Beletsky	Harsh Kumar	FLEET	tns_2026xg_2026-03-23_07-24-00_Magellan-Clay_LDSS-3_FLEET.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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2026-01-15 05:07:04 - 2026-01-16 04:05:26

2461055.71324 - 2461056.67044

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
550859	2026-01-16 04:05:26	2461056.67044	19.365	0.116	20.14	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot
550858	2026-01-15 05:07:04	2461055.71324			20.11	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

w-P1

PS2_GPC2

2026-01-17 12:54:04 - 2026-01-17 12:54:04

2461058.03755 - 2461058.03755

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
554941	2026-01-17 12:54:04	2461058.03755	19.4	0.05	22	ABMag	w-P1	PS2_GPC2	45	Robot

L-GOTO

GOTO-N_GOTO-1

2025-12-31 06:09:26 - 2026-01-15 04:58:33

2461040.756549 - 2461055.707335

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
552014	2026-01-15 04:58:33	2461055.707335	19.95	0.2		ABMag	L-GOTO	GOTO-N_GOTO-1	180
552013	2025-12-31 06:09:26	2461040.756549			20	ABMag	L-GOTO	GOTO-N_GOTO-1	180		[Last non detection]

r-ZTF

P48_ZTF-Cam

2026-01-10 13:16:22 - 2026-01-13 11:43:06

2461051.0530324 - 2461053.9882639

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
549424	2026-01-13 11:43:06	2461053.9882639	19.5836	0.168102		ABMag	r-ZTF	P48_ZTF-Cam
549422	2026-01-10 13:16:22	2461051.0530324			19.4212	ABMag	r-ZTF	P48_ZTF-Cam			[Last non detection]

g-ZTF

P48_ZTF-Cam

2026-01-11 12:09:10 - 2026-01-11 12:09:10

2461052.0063657 - 2461052.0063657

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
549423	2026-01-11 12:09:10	2461052.0063657	19.9833	0.170726		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
289519	2026-01-31 02:01:51	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	12:51:04.978	+08:12:32.44	2026-01-17 12:54:04.320	19.4	w-P1		PSN		PS26ol	Pan-STARRS				N
288030	2026-01-20 09:54:32	GOTO_bot	G. Ramsay, D. O'Neill, K. Ackley et al.	GOTO	GOTO	12:51:04.986	+08:12:32.92	2026-01-15 04:58:33.312	19.95	L-GOTO		Other		GOTO26jn	GOTO				N
287568	2026-01-16 22:53:49	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	12:51:04.991	+08:12:32.57	2026-01-16 04:05:26.016	19.365	wide-ATLAS		PSN		ATLAS26arq	ATLAS				N
286909	2026-01-13 13:02:49	Fritz	Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al.	ZTF	ZTF	12:51:04.999	+08:12:32.07	2026-01-11 12:09:09.996	19.9833	g-ZTF		PSN		ZTF26aaavhvm	ZTF			2026TNSTR.146....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

23403

2026-03-31 20:28:03

Peter Blanchard

Peter Blanchard (Harvard/CfA), Harsh Kumar (Harvard/CfA), Edo Berger (Harvard/CfA), Sebastian Gomez (UT Austin), Daichi Hiramatsu (Univ. of Florida)

FLEET

SN IIb

0.055

1

FLEET

2026TNSCR1380....1B

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
23405	2026-03-23 07:24:00	Magellan-Clay / LDSS-3		Yuri Beletsky	Harsh Kumar	FLEET	tns_2026xg_2026-03-23_07-24-00_Magellan-Clay_LDSS-3_FLEET.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 289519 of Group Pan-STARRS
Previous RA, DEC: 12:51:04.999, +08:12:32.07 (192.7708307, +8.2089076)
Updated RA, DEC: 12:51:04.978, +08:12:32.44 (192.770739924, +8.20901193752)

Log in or register to post comments

Log in or register to post comments