2026koi | Transient Name Server

RA/DEC (2000)

17:21:51.566 +31:06:22.16

260.46485659 +31.1061545827

Type

SN Ic-BL

Redshift

0.09

Discovery Report Classification Report

Related AstroNotes: 2026-125

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2026-04-24 01:33:12.672

TNS AT

Y

Public

Y

Discovery Mag

19.758

Filter

wide-ATLAS

Reporter/s

J. Tonry, L. Denneau, H. Weiland (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, P. J. Broda, A. J. Smith (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (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

▌

ATLAS-TDO_ATLAS-05_wide

▌

GOTO-N_GOTO-2_L

▌

PS2_GPC2_i

▌

ATLAS-HKO_ATLAS-02_orange

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
	23652	2026-05-06 07:05:10	ESO-NTT / EFOSC2-NTT	1799	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_2026koi_2026-05-06_07-05-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2026koi_2026-05-06_07-05-10_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

wide-ATLAS

ATLAS-TDO_ATLAS-05

2026-04-24 01:33:13 - 2026-04-24 01:33:13

2461154.56473 - 2461154.56473

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577594	2026-04-24 01:33:13	2461154.56473	19.758	0.292	20	ABMag	wide-ATLAS	ATLAS-TDO_ATLAS-05	30	Robot

L-GOTO

GOTO-N_GOTO-2

2026-04-22 02:41:42 - 2026-04-23 02:07:21

2461152.612294 - 2461153.588438

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577898	2026-04-23 02:07:21	2461153.588438	19.77	0.16		ABMag	L-GOTO	GOTO-N_GOTO-2	180
577897	2026-04-22 02:41:42	2461152.612294			20.2	ABMag	L-GOTO	GOTO-N_GOTO-2	180		[Last non detection]

i-P1

PS2_GPC2

2026-04-23 12:55:31 - 2026-04-23 12:55:31

2461154.03855 - 2461154.03855

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
579417	2026-04-23 12:55:31	2461154.03855	19.92	0.04	20.7	ABMag	i-P1	PS2_GPC2	27	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2026-04-23 12:14:03 - 2026-04-23 12:14:03

2461154.00976 - 2461154.00976

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
577593	2026-04-23 12:14:03	2461154.00976			19.57	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[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
302237	2026-05-03 21:38:31	YSE_Bot1	D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al.	YSE	Pan-STARRS	17:21:51.566	+31:06:22.16	2026-04-23 12:55:30.720	19.92	i-P1		PSN		PS26bdx	Pan-STARRS				N
301440	2026-04-25 12:05:12	GOTO_bot	G. Ramsay, K. Ackley, M. Dyer et al.	GOTO	GOTO	17:21:51.569	+31:06:23.02	2026-04-23 02:07:21.216	19.77	L-GOTO		Other		GOTO26dsd	GOTO				N
301294	2026-04-24 08:41:08	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	17:21:51.547	+31:06:22.19	2026-04-24 01:33:12.672	19.758	wide-ATLAS		PSN		ATLAS26etk	ATLAS			2026TNSTR1798....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

23649

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 Ic-BL

0.09

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
23652	2026-05-06 07:05:10	ESO-NTT / EFOSC2-NTT	1799	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_2026koi_2026-05-06_07-05-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci	tns_2026koi_2026-05-06_07-05-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 302237 of Group Pan-STARRS
Previous RA, DEC: 17:21:51.547, +31:06:22.19 (260.46478, +31.1061633333)
Updated RA, DEC: 17:21:51.566, +31:06:22.16 (260.46485659, +31.1061545827)

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