2026sqm | Transient Name Server

RA/DEC (2000)

21:25:48.202 -29:24:54.84

321.450840504 -29.415232451

Type

SN Ia

Redshift

0.057

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2026-07-06 11:45:02.304

TNS AT

Y

Public

Y

Discovery Mag

18.635

Filter

orange-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, J. Weston, X. Sheng, C. R. Angus, D. Magill, A. J. Smith, L. Shingles (QUB), A. Aamer (Arizona), P. Ramsden (Birmingham/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (Oxford), L. Rhodes (TSI/McGill), T. Moore, A. Rest (STScI), T.-W. Chen (NCU), C. Deasy-Millar (TCD), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

GOTO-S_GOTO-4_L

▌

ATLAS-CHL_ATLAS-04_orange

▌

ATLAS-HKO_ATLAS-02_orange

▌

PS1_GPC1_w

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
	24242	2026-07-11 11:38:46	UH88 / SNIFS	1800	Desai		SCAT	tns_2026sqm_2461232.98525_UH88_SNIFS_SCAT.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 z-step: v-step: Remarks

Light Curves

Filter

Tel / Inst

Obs-date range

JD Range

Photometry

L-GOTO

GOTO-S_GOTO-4

2026-06-23 17:06:33 - 2026-07-20 15:28:31

2461215.212877 - 2461242.144801

2

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
606176	2026-07-20 15:28:31	2461242.144801	19.18	0.06		ABMag	L-GOTO	GOTO-S_GOTO-4	180
606175	2026-06-23 17:06:33	2461215.212877			20.1	ABMag	L-GOTO	GOTO-S_GOTO-4	180		[Last non detection]

orange-ATLAS

ATLAS-CHL_ATLAS-04

2026-07-05 06:39:36 - 2026-07-05 06:39:36

2461226.7775 - 2461226.7775

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
600224	2026-07-05 06:39:36	2461226.7775			18.85	ABMag	orange-ATLAS	ATLAS-CHL_ATLAS-04	30	Robot	[Last non detection]

orange-ATLAS

ATLAS-HKO_ATLAS-02

2026-07-06 11:45:02 - 2026-07-06 11:45:02

2461227.98961 - 2461227.98961

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
600225	2026-07-06 11:45:02	2461227.98961	18.635	0.156	18.95	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot

w-P1

PS1_GPC1

2026-07-08 12:08:30 - 2026-07-08 12:08:30

2461230.0059 - 2461230.0059

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
605699	2026-07-08 12:08:30	2461230.0059	18.8	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
316449	2026-07-22 13:19:26	GOTO_bot	S. Belkin, D. O'Neill, K. Ackley et al.	GOTO	GOTO	21:25:48.167	-29:24:54.78	2026-07-20 15:28:30.720	19.18	L-GOTO		Other		GOTO26hdk	GOTO				N
316102	2026-07-20 22:37:08	PS1_Bot1	K. C. Chambers, T. de Boer, J. Fairlamb et al.	Pan-STARRS	Pan-STARRS	21:25:48.202	-29:24:54.84	2026-07-08 12:08:29.760	18.8	w-P1		PSN		PS26few	Pan-STARRS				N
313395	2026-07-08 07:48:49	ATLAS_Bot1	J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al.	ATLAS	ATLAS	21:25:48.177	-29:24:54.86	2026-07-06 11:45:02.304	18.635	orange-ATLAS		PSN		ATLAS26ifh	ATLAS			2026TNSTR2835....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

24236

2026-07-12 22:37:47

Dhvanil Desai

Dhvanil Desai (on behalf of the SCAT team)

SCAT

SN Ia

0.057

1

SCAT

Classification and redshift using the red side of the spectrum with SNID-SAGE.

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
24242	2026-07-11 11:38:46	UH88 / SNIFS	1800	Desai		SCAT	tns_2026sqm_2461232.98525_UH88_SNIFS_SCAT.dat		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 316102 of Group Pan-STARRS
Previous RA, DEC: 21:25:48.177, -29:24:54.86 (321.450738, -29.415238)
Updated RA, DEC: 21:25:48.202, -29:24:54.84 (321.450840504, -29.415232451)

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