2026bcs | Transient Name Server

RA/DEC (2000)

17:54:25.364 +42:49:17.82

268.60568277778 +42.821616033333

Type

SN Ia

Redshift

0.0695

Discovery Report Classification Report

Related AstroNotes: 2026-18

Reporting Group

ZTF

Discovering Data Source

ZTF

Discovery Date

2026-01-18 13:21:05.002

TNS AT

Y

Public

Y

Discovery Mag

18.827

Filter

g-ZTF

Reporter/s

Daniel Perley (LJMU), Christoffer Fremling (Caltech), 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
	22923	2026-02-04 11:32:24	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2026bcs_2026-02-04_11-32-24.059103_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
	22933	2026-02-03 22:00:17	Lijiang-2.4m / YFOSC		Luhan Li	Luhan Li	YNTS	tns_2026bcs_2026-02-03_22-00-17.256_Lijiang-2.4m_YFOSC_YNTS.dat		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

2026-01-29 07:16:14 - 2026-01-29 07:16:14

2461069.80294 - 2461069.80294

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
555034	2026-01-29 07:16:14	2461069.80294			16.62	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot	[Last non detection]

r-WFST

WFST_WFST-WFC

2026-03-30 20:05:17 - 2026-03-30 20:05:17

2461130.337 - 2461130.337

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
573942	2026-03-30 20:05:17	2461130.337	19.73	0.04		ABMag	r-WFST	WFST_WFST-WFC	30

L-GOTO

GOTO-N_GOTO-2

2025-11-06 19:28:42 - 2026-03-08 06:26:57

2460986.311596 - 2461107.768721

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
565636	2026-03-08 06:26:57	2461107.768721	19.35	0.17		ABMag	L-GOTO	GOTO-N_GOTO-2	180
565635	2025-11-06 19:28:42	2460986.311596			19.3	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

g-ZTF

P48_ZTF-Cam

2026-01-18 13:21:05 - 2026-01-20 13:10:14

2461059.0563079 - 2461061.0487731

3

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553103	2026-01-20 13:10:14	2461061.0487731	18.5994	0.074531		ABMag	g-ZTF	P48_ZTF-Cam
553102	2026-01-18 13:21:05	2461059.0563079	18.827	0.080717		ABMag	g-ZTF	P48_ZTF-Cam
556001	2026-01-18 13:21:05	2461059.0563079	18.827	0.080717	20.3151	ABMag	g-ZTF	P48_ZTF-Cam	30	Robot	Data provided by ZTF, classified by Fink

orange-ATLAS

ATLAS-HKO_ATLAS-02

2026-01-30 14:34:06 - 2026-01-30 14:34:06

2461071.10701 - 2461071.10701

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
555035	2026-01-30 14:34:06	2461071.10701	18.422	0.17	18.45	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot

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
299421	2026-04-09 13:26:50	WFST_SN	Zelin Xu, Dezheng Meng, Ji-an Jiang et al.	WFST	WFST	17:54:25.360	+42:49:17.68	2026-03-30 20:05:16.800	19.73	r-WFST		PSN		WFST260330agjzn	WFST				N
294910	2026-03-18 10:12:04	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	17:54:25.292	+42:49:18.24	2026-03-08 06:26:57.408	19.35	L-GOTO		Other		GOTO26cai	GOTO				N
290039	2026-02-05 19:48:14	Fink	Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker	Fink	ZTF	17:54:25.364	+42:49:17.82	2026-01-18 13:21:05.003	18.827	g-ZTF		PSN		ZTF26aachhsm	ZTF		Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF26aachhsm		N
289561	2026-01-31 09:20:43	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	17:54:25.342	+42:49:17.67	2026-01-30 14:34:05.664	18.422	orange-ATLAS		PSN		ATLAS26bgu	ATLAS				N
288564	2026-01-24 07:51:42	Fritz	Daniel Perley (LJMU), Christoffer Fremling (Caltech), Theophile du Laz (Caltech) on behalf of ZTF	ZTF	ZTF	17:54:25.370	+42:49:17.89	2026-01-18 13:21:05.002	18.827	g-ZTF		PSN		ZTF26aachhsm	ZTF			2026TNSTR.318....1P	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

22932

2026-02-07 13:51:46

Luhan Li

Bo Wang, Luhan Li, Xinjie Luo, Shiyang Dong, Dongdong Liu(YNAO)

YNTS

SN Ia

1

YNTS

2026TNSCR.527....1W

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
22933	2026-02-03 22:00:17	Lijiang-2.4m / YFOSC		Luhan Li	Luhan Li	YNTS	tns_2026bcs_2026-02-03_22-00-17.256_Lijiang-2.4m_YFOSC_YNTS.dat		Object

22922

2026-02-05 16:21:50

ZTF_Bot1

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

ZTF

SN Ia

0.0695

1

ZTF

2026TNSCR.495....1W

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
22923	2026-02-04 11:32:24	P60 / SEDM	2160	SEDmRobot	auto	ZTF	tns_2026bcs_2026-02-04_11-32-24.059103_P60_SEDM_ZTF.ascii		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 290039 of Group ZTF
Previous RA, DEC: 17:54:25.370, +42:49:17.89 (268.6057096, +42.8216355)
Updated RA, DEC: 17:54:25.364, +42:49:17.82 (268.60568277778, +42.821616033333)

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