2026jcw | Transient Name Server

RA/DEC (2000)

13:48:22.880 -31:10:42.45

207.095332316 -31.1784581835

Type

SN IIn

Redshift

0.039

Discovery Report Classification Report

Related AstroNotes: 2026-125

Reporting Group

BlackGEM

Discovering Data Source

BlackGEM

Discovery Date

2026-04-09 01:53:37.000

TNS AT

Y

Public

Y

Discovery Mag

19.95

Filter

BG-q-BlackGem

Reporter/s

P. Groot, H. Tranin, F. Stoppa, D. Pieterse, G. Ramsay, S. Faris, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi

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
	23650	2026-05-06 06:12:48	ESO-NTT / EFOSC2-NTT	900	Jasvinderjit Khaulsay, Camila Cárdenas	Aiswarya Sankar.K, Anirban Dutta, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Amar Aryan, Ting-Wan Chen	ePESSTO+	tns_2026jcw_2026-05-06_06-12-48_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2026jcw_2026-05-06_06-12-48_ESO-NTT_EFOSC2-NTT_ePESSTO+.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

2026-03-05 15:58:57 - 2026-04-07 14:34:45

2461105.165941 - 2461138.10746

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
578461	2026-04-07 14:34:45	2461138.10746	19.98	0.2		ABMag	L-GOTO	GOTO-S_GOTO-4	180
578460	2026-03-05 15:58:57	2461105.165941			18.9	ABMag	L-GOTO	GOTO-S_GOTO-4	180		[Last non detection]

orange-ATLAS

ATLAS-STH_ATLAS-03

2026-04-09 21:58:35 - 2026-04-09 21:58:35

2461140.41568 - 2461140.41568

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
574215	2026-04-09 21:58:35	2461140.41568	19.155	0.162	19.51	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot

BG-q-BlackGem

BG3_BlackGEM-Cam3

2026-04-09 01:53:37 - 2026-04-09 01:53:37

2461139.5789005 - 2461139.5789005

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
574047	2026-04-09 01:53:37	2461139.5789005	19.95	0.15	20.54	ABMag	BG-q-BlackGem	BG3_BlackGEM-Cam3	60	robotic

BG-q-BlackGem

BG2_BlackGEM-Cam2

2026-04-07 05:35:13 - 2026-04-07 05:35:13

2461137.7327894 - 2461137.7327894

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
574046	2026-04-07 05:35:13	2461137.7327894			19.95	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic	[Last non detection]

orange-ATLAS

ATLAS-HKO_ATLAS-02

2026-04-07 11:17:23 - 2026-04-07 11:17:23

2461137.97041 - 2461137.97041

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
574214	2026-04-07 11:17:23	2461137.97041			14.2	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

w-P1

PS1_GPC1

2026-05-20 07:46:11 - 2026-05-20 07:46:11

2461180.82374 - 2461180.82374

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
590493	2026-05-20 07:46:11	2461180.82374	18.64	0.02	22	ABMag	w-P1	PS1_GPC1	45	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
307821	2026-06-09 10:28:21	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	13:48:22.880	-31:10:42.45	2026-05-20 07:46:11.136	18.64	w-P1		PSN		PS26bvm	Pan-STARRS				N
301747	2026-04-27 22:40:34	GOTO_bot	D. O'Neill, K. Ackley, M. Dyer et al.	GOTO	GOTO	13:48:22.879	-31:10:42.43	2026-04-07 14:34:44.544	19.98	L-GOTO		Other		GOTO26dox	GOTO				N
299566	2026-04-10 09:31:45	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	13:48:22.910	-31:10:42.63	2026-04-09 21:58:34.752	19.155	orange-ATLAS		PSN		ATLAS26dxz	ATLAS				N
299481	2026-04-10 06:33:02	BlackGEM_Bot1	P. Groot, H. Tranin, F. Stoppa et al.	BlackGEM	BlackGEM	13:48:22.893	-31:10:42.12	2026-04-09 01:53:37.000	19.95	BG-q-BlackGem		PSN		BGEM J134822.89-311042.1	BlackGEM			2026TNSTR1520....1G	N

Classification Reports

ID

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

23647

2026-05-06 16:59:54

ePESSTOplus_Bot1

Jasvinderjit Khaulsay, Camila Cárdenas, Aiswarya Sankar.K, Anirban Dutta, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Amar Aryan, Ting-Wan Chen, O. Yaron on behalf of ePESSTO+

ePESSTO+

SN IIn

0.039

1

ePESSTO+

2026TNSCR1962....1K

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
23650	2026-05-06 06:12:48	ESO-NTT / EFOSC2-NTT	900	Jasvinderjit Khaulsay, Camila Cárdenas	Aiswarya Sankar.K, Anirban Dutta, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Amar Aryan, Ting-Wan Chen	ePESSTO+	tns_2026jcw_2026-05-06_06-12-48_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2026jcw_2026-05-06_06-12-48_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 307821 of Group Pan-STARRS
Previous RA, DEC: 13:48:22.893, -31:10:42.12 (207.095387, -31.178367)
Updated RA, DEC: 13:48:22.880, -31:10:42.45 (207.095332316, -31.1784581835)

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