2021ksr | Transient Name Server

RA/DEC (2000)

15:13:41.507 +70:44:36.39

228.422946671 +70.7434417737

Type

SN Ib

Redshift

0.053

Discovery Report Classification Report

Reporting Group

ATLAS

Discovering Data Source

ATLAS

Discovery Date

2021-04-30 10:56:38.400

TNS AT

Public

Discovery Mag

18.918

Filter

orange-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, C. Webb (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_orange

▌

ATLAS-HKO_ATLAS-02_orange

▌

PS1_GPC1_i

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
	9570	2021-05-05 02:53:47	TNG / DOLORES	900	Shane Moran		None	tns_2021ksr_2021-05-05_02-53-47_TNG_DOLORES.dat	tns_2021ksr_2021-05-05_02-53-47_TNG_DOLORES.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

orange-ATLAS

ATLAS-MLO_ATLAS-01

2021-04-30 10:56:38 - 2021-04-30 10:56:38

2459334.956 - 2459334.956

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
209320	2021-04-30 10:56:38	2459334.956	18.918	0.174	19.25	ABMag	orange-ATLAS	ATLAS-MLO_ATLAS-01	30	Robot

orange-ATLAS

ATLAS-HKO_ATLAS-02

2021-04-28 12:41:46 - 2021-04-28 12:41:46

2459333.029 - 2459333.029

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
209319	2021-04-28 12:41:46	2459333.029			18.74	ABMag	orange-ATLAS	ATLAS-HKO_ATLAS-02	30	Robot	[Last non detection]

i-P1

PS1_GPC1

2021-05-04 11:54:14 - 2021-05-04 11:54:14

2459338.996 - 2459338.996

Photometry

ID	Obs-date	JD	Mag. / Flux	Err	Lim. Mag./Flux	Units	Filter	Tel / Inst	Exp-time	Observer/s	Remarks
211225	2021-05-04 11:54:14	2459338.996	19.26	0.05	20.7	ABMag	i-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
108634	2021-05-07 10:12:05	PS1_Bot1	K. C. Chambers, T. de Boer, J. Bulger et al.	Pan-STARRS	Pan-STARRS	15:13:41.507	+70:44:36.39	2021-05-04 11:54:14.400	19.26	i-P1		PSN		PS21dor	Pan-STARRS				N
107909	2021-05-01 00:14:53	ATLAS_Bot1	J. Tonry, L. Denneau, A. Heinze et al.	ATLAS	ATLAS	15:13:41.636	+70:44:36.54	2021-04-30 10:56:38.400	18.918	orange-ATLAS		PSN		ATLAS21nqe	ATLAS			2021TNSTR1406....1T	N

Classification Reports

Time received (UT)

Sender

Classifier/s

Group

Classification

Redshift

Spectra

Related files

Assoc. Groups

End prop. period

Remarks

ADS Bibcode

9560

2021-05-05 20:25:03

Shane Moran

Shane Moran, Rubina Kotak, Seppo Mattila (University of Turku), Morgan Fraser (University College Dublin)

None

SN Ib

0.053

The authors report, on behalf of a larger collaboration, on the spectroscopic classification of AT 2021ksr (15:13:41.636 +70:44:36.54) that was reported as a transient candidate by the ZTF collaboration. The spectrum matches well with Ib spectra in the SNID classification tool (https://people.lam.fr/blondin.stephane/software/snid/), which suggests that it is approximately 7 days pre-maximum at a redshift of z = 0.053. The observations were carried out on 2021-05-05 02:53:47.040 at the 3.58 m Telescopio Nazionale Galileo (http://www.tng.iac.es) using the DOLORES instrument with the LR-B grism (range 300-843 nm).

2021TNSCR1480....1M

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
9570	2021-05-05 02:53:47	TNG / DOLORES	900	Shane Moran		None	tns_2021ksr_2021-05-05_02-53-47_TNG_DOLORES.dat	tns_2021ksr_2021-05-05_02-53-47_TNG_DOLORES.fits	Object

Comments

Object coordinates updated

Object coordinates updated according to AT-report 108634 of Group Pan-STARRS1
Previous RA, DEC: 15:13:41.636, +70:44:36.54 (228.4234825, +70.7434825)
Updated RA, DEC: 15:13:41.507, +70:44:36.39 (228.422946671, 70.7434417737)

SN 2021ksr

Spectra

Light curves

Comments

Object coordinates updated