2025wpl | Transient Name Server

RA/DEC (2000)

13:48:10.469 -30:27:25.31

207.043621 -30.457031

Type

SN II

Redshift

0.012

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2025-09-01 17:16:05.664

TNS AT

Y

Public

Y

Discovery Mag

17.341

Filter

orange-ATLAS

Reporter/s

J. Tonry, L. Denneau, H. Weiland, R. Siverd (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 (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (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
	21984	2025-09-07 17:20:52	Lesedi / Mookodi	600	N. Erasmus, S. Potter, C. van Gend, H. Worters, S. Chandra, D. Cunnama, M. Hlakola, P. Rabe, R. Julie (all SAAO)	Simon de Wet	BlackGEM	tns_2025wpl_2025-09-07_17-20-52.202_Lesedi_Mookodi_BlackGEM.csv		Object			The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager [1] as part of the “IO” rapid follow-up program [2]. The spectrum was taken with the widest (4") slit width which resulted in a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250
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 The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager [1] as part of the “IO” rapid follow-up program [2]. The spectrum was taken with the widest (4") slit width which resulted in a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-S_GOTO-4

2026-01-24 17:39:12 - 2026-01-24 17:39:12

2461065.235558 - 2461065.235558

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553413	2026-01-24 17:39:12	2461065.235558	19.79	0.11		ABMag	L-GOTO	GOTO-S_GOTO-4	180

L-GOTO

GOTO-S_GOTO-3

2025-07-06 10:41:19 - 2025-07-06 10:41:19

2460862.945362 - 2460862.945362

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
553412	2025-07-06 10:41:19	2460862.945362			19.5	ABMag	L-GOTO	GOTO-S_GOTO-3	360		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-08-16 01:38:02 - 2025-08-16 01:38:02

2460903.56808 - 2460903.56808

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
514942	2025-08-16 01:38:02	2460903.56808			19.19	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	110	Robot	[Last non detection]

orange-ATLAS

ATLAS-STH_ATLAS-03

2025-09-01 17:16:06 - 2025-09-01 17:16:06

2460920.21951 - 2460920.21951

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
514943	2025-09-01 17:16:06	2460920.21951	17.341	0.104	17.95	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot

BG-q-BlackGem

BG2_BlackGEM-Cam2

2025-04-28 03:30:30 - 2025-12-31 08:00:10

2460793.6461806 - 2461040.8334491

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
546568	2025-12-31 08:00:10	2461040.8334491	19.05	0.08	20.4	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic
546567	2025-04-28 03:30:30	2460793.6461806			21.16	ABMag	BG-q-BlackGem	BG2_BlackGEM-Cam2	60	robotic	[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
288737	2026-01-24 20:24:41	GOTO_bot	D. O'Neill, M. Pursiainen, K. Ackley et al.	GOTO	GOTO	13:48:10.491	-30:27:25.51	2026-01-24 17:39:12.384	19.79	L-GOTO		PSN		GOTO26zg	GOTO				N
285256	2026-01-01 12:02:02	BlackGEM_Bot1	S. Faris, H. Tranin, F. Stoppa et al.	BlackGEM	BlackGEM	13:48:10.469	-30:27:25.31	2025-12-31 08:00:10.000	19.05	BG-q-BlackGem		PSN		BGEM J134810.47-302725.3	BlackGEM				N
268954	2025-09-01 20:25:23	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland et al.	ATLAS	ATLAS	13:48:10.474	-30:27:25.25	2025-09-01 17:16:05.664	17.341	orange-ATLAS		PSN		ATLAS25kwk	ATLAS			2025TNSTR3490....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

21984

2025-09-07 18:57:23

Simon de Wet

Simon de Wet

BlackGEM

SN II

0.012

1

BlackGEM

SNID SAGE (Stoppa, in prep, 2025) shows close matches to young Type II SN spectra at z=0.012.

2025TNSCR3606....1d

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
21984	2025-09-07 17:20:52	Lesedi / Mookodi	600	N. Erasmus, S. Potter, C. van Gend, H. Worters, S. Chandra, D. Cunnama, M. Hlakola, P. Rabe, R. Julie (all SAAO)	Simon de Wet	BlackGEM	tns_2025wpl_2025-09-07_17-20-52.202_Lesedi_Mookodi_BlackGEM.csv		Object			The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager [1] as part of the “IO” rapid follow-up program [2]. The spectrum was taken with the widest (4") slit width which resulted in a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250

Comments

Object coordinates updated

Object coordinates updated according to AT-report 285256 of Group BlackGEM
Previous RA, DEC: 13:48:10.474, -30:27:25.25 (207.04364, -30.4570128571)
Updated RA, DEC: 13:48:10.469, -30:27:25.31 (207.043621, -30.457031)

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