2021ali | Transient Name Server

RA/DEC (2000)

09:17:36.720 +18:19:23.46

139.402999685 +18.3231843014

Type

SLSN-II

Redshift

0.192

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2021-01-15 12:28:48.000

TNS AT

Y

Public

Y

Discovery Mag

19.504

Filter

cyan-ATLAS

Reporter/s

J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, M. Fulton, J. Gillanders (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)

NED SIMBAD DECaLS PanSTARRS-1 SkyMapper VizieR WISE DSS ADS

Light curves

▌

ATLAS-MLO_ATLAS-01_cyan

▌

ATLAS-HKO_ATLAS-02_cyan

▌

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
	8792	2021-01-21 00:00:00	Magellan-Clay / LDSS-3		Yuri Beletsky	Sebastian Gomez	FLEET	tns_2021ali_2021-01-21_Magellan-Clay_LDSS-3_FLEET.txt		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

cyan-ATLAS

ATLAS-MLO_ATLAS-01

2021-01-15 12:28:48 - 2021-01-15 12:28:48

2459230.02 - 2459230.02

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
187073	2021-01-15 12:28:48	2459230.02	19.504	0.154	19.89	ABMag	cyan-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

cyan-ATLAS

ATLAS-HKO_ATLAS-02

2021-01-09 13:22:05 - 2021-01-09 13:22:05

2459224.057 - 2459224.057

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
187072	2021-01-09 13:22:05	2459224.057			15.1	ABMag	cyan-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

w-P1

PS1_GPC1

2021-01-23 12:40:19 - 2021-01-23 12:40:19

2459238.028 - 2459238.028

1

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
188740	2021-01-23 12:40:19	2459238.028	19.8	0.09	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
97808	2021-01-25 23:47:43	PS1_Bot1	K. C. Chambers, T. de Boer, J. Bulger et al.	Pan-STARRS	Pan-STARRS	09:17:36.720	+18:19:23.46	2021-01-23 12:40:19.200	19.8	w-P1		PSN		PS21sz	Pan-STARRS		This transient was discovered with the help of citizen science project Supernova Hunters run by Zooniverse. The candidate was identified by volunteers including Henryk Krawczyk, Amoli Kakkar and carlton webb		N
96940	2021-01-16 13:50:26	ATLAS_Bot1	J. Tonry, L. Denneau, A. Heinze et al.	ATLAS	ATLAS	09:17:36.679	+18:19:23.14	2021-01-15 12:28:48.000	19.504	cyan-ATLAS		PSN		ATLAS21chx	ATLAS			2021TNSTR.161....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

8780

2021-02-05 20:53:39

Sebastian Gomez

Sebastian Gomez, Griffin Hosseinzadeh, Edo Berger (Harvard CfA) Peter Blanchard (Northwestern)

FLEET

SLSN-II

0.192

1

FLEET

AT2021ali was selected as a superluminous supernova candidate using FLEET (Gomez et al., 2020, ApJ, 904, 74) with a probability P(SLSN) = 0.45. The presence of balmer lines implies a redshift of z = 0.192. This makes the peak luminosity of the transient M_r = -20.1.

2021TNSCR.353....1G

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
8792	2021-01-21 00:00:00	Magellan-Clay / LDSS-3		Yuri Beletsky	Sebastian Gomez	FLEET	tns_2021ali_2021-01-21_Magellan-Clay_LDSS-3_FLEET.txt		Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 97808 of Group Pan-STARRS1
Previous RA, DEC: 09:17:36.679, +18:19:23.14 (139.40283, +18.323095)
Updated RA, DEC: 09:17:36.720, +18:19:23.46 (139.402999685, 18.3231843014)

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