2025jyk | Transient Name Server

RA/DEC (2000)

22:20:52.154 -48:22:23.35

335.217308824 -48.3731529412

Type

SN Ia

Redshift

0.02

Discovery Report Classification Report

Reporting Group

BOSS

Discovering Data Source

BOSS

Discovery Date

2025-05-05 16:56:11.000

TNS AT

Y

Public

Y

Host Name

ESO-238-G-005

Discovery Mag

17

Filter

Clear-

Reporter/s

Stuart Parker

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

GOTO-S_GOTO-3_L

▌

ATLAS-CHL_ATLAS-04_orange

▌

ATLAS-STH_ATLAS-03_orange

▌

Other_Other_Clear

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
	21011	2025-05-10 00:55:10	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_2025jyk_2025-05-10_00-55-09.884_Lesedi_Mookodi_BlackGEM.csv		Object			The spectrum was taken with the SAAO's 1-m Lesedi 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 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-3

2025-04-05 18:40:17 - 2025-05-17 18:50:49

2460771.277984 - 2460813.285293

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
488771	2025-05-17 18:50:49	2460813.285293	15.51	0.01		ABMag	L-GOTO	GOTO-S_GOTO-3	180
488770	2025-04-05 18:40:17	2460771.277984			19.4	ABMag	L-GOTO	GOTO-S_GOTO-3	90		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2025-05-09 08:28:50 - 2025-05-09 08:28:50

2460804.85336 - 2460804.85336

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
487579	2025-05-09 08:28:50	2460804.85336	16.146	0.028	18.76	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot

orange-ATLAS

ATLAS-STH_ATLAS-03

2025-05-07 00:20:44 - 2025-05-07 00:20:44

2460802.5144 - 2460802.5144

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
487578	2025-05-07 00:20:44	2460802.5144			18.93	ABMag	orange-ATLAS	ATLAS-STH_ATLAS-03	30	Robot	[Last non detection]

Clear-

Other_Other

2024-04-04 14:14:20 - 2025-05-05 00:00:00

2460405.093287 - 2460800.5

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
487062	2025-05-05 00:00:00	2460800.5	17		18	Other	Clear-	Other_Other	40	Parker
487061	2024-04-04 14:14:20	2460405.093287			18	Other	Clear-	Other_Other	30	parker	[Last non detection] clear filter estimate only

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
255271	2025-05-17 20:32:57	GOTO_bot	D. O'Neill,A. Kumar,K. Ackley et al.	GOTO	GOTO	22:20:52.169	-48:22:23.48	2025-05-17 18:50:49.056	15.51	L-GOTO		Other		GOTO25css	GOTO				N
254638	2025-05-09 16:00:53	ATLAS_Bot1	J. Tonry,L. Denneau,H. Weiland et al.	ATLAS	ATLAS	22:20:52.154	-48:22:23.35	2025-05-09 08:28:50.304	16.146	orange-ATLAS		PSN		ATLAS25ewz	ATLAS				N
254359	2025-05-07 09:55:54	Stuart Parker	Stuart Parker et al.	BOSS	BOSS	22:20:52.000	-48:22:23.70	2025-05-05 16:56:11.000	17	Clear-		PSN	ESO-238-G-005		BOSS			2025TNSTR1695....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

21011

2025-05-10 09:03:24

Simon de Wet

Simon de Wet

BlackGEM

SN Ia

0.02

1

BlackGEM

Spectral template matching with NGSF shows a match to a SN Ia at z=0.02.

2025TNSCR1745....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
21011	2025-05-10 00:55:10	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_2025jyk_2025-05-10_00-55-09.884_Lesedi_Mookodi_BlackGEM.csv		Object			The spectrum was taken with the SAAO's 1-m Lesedi 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 254638 of Group ATLAS
Previous RA, DEC: 22:20:52.000, -48:22:23.70 (335.216667, -48.37325)
Updated RA, DEC: 22:20:52.154, -48:22:23.35 (335.217308824, -48.3731529412)

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