Related papers: SNLS: Overview and High-z Spectroscopy

Gemini Spectroscopy of Supernovae from SNLS: Improving High Redshift SN Selection and Classification

We present new techiques for improving the efficiency of supernova (SN) classification at high redshift using 64 candidates observed at Gemini North and South during the first year of the Supernova Legacy Survey (SNLS). The SNLS is an…

Astrophysics · Physics 2009-11-13 D. A. Howell , M. Sullivan , K. Perrett , T. J. Bronder , I. M. Hook , P. Astier , E. Aubourg , D. Balam , S. Basa , R. G. Carlberg , S. Fabbro , D. Fouchez , J. Guy , H. Lafoux , J. D. Neill , R. Pain , N. Palanque-Delabrouille , C. J. Pritchet , N. Regnault , J. Rich , R. Taillet , R. Knop , R. G. McMahon , S. Perlmutter , N. A. Walton

Supernova Legacy Survey: Using Spectral Signatures To Improve Type Ia Supernovae As Distance Indicators

GMOS optical long-slit spectroscopy at the Gemini-North telescope was used to classify targets from the Supernova Legacy Survey (SNLS) from July 2005 and May 2006 - May 2008. During this time, 95 objects were observed. Where possible the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 E. S. Walker , I. M. Hook , M. Sullivan , D. A. Howell , P. Astier , C. Balland , S. Basa , T. J. Bronder , R. Carlberg , A. Conley , D. Fouchez , J. Guy , D. Hardin , R. Pain , K. Perrett , C. Pritchet , N. Regnault , J. Rich , G. Aldering , H. K. Fakhouri , T. Kronborg , N. Palanque-Delabrouille , S. Perlmutter , V. Ruhlmann-Kleider , T. Zhang

SNLS -- the Supernova Legacy Survey

Type Ia supernovae provide direct evidence for an accelerating universe, and for the existence of "dark energy" driving this expansion. The Supernova Legacy Survey (SNLS) will deliver many hundreds of SNIa detections, and well-sampled…

Astrophysics · Physics 2007-05-23 C. J. Pritchet , SNLS Collaboration

The Supernova Legacy Survey

Type Ia supernovae (SNe Ia) currently provide the most direct evidence for an accelerating Universe and for the existence of an unknown "dark energy" driving this expansion. The 5-year Supernova Legacy Survey (SNLS;…

Astrophysics · Physics 2019-08-14 Mark Sullivan

Supernova Legacy Survey (SNLS) : real time operations and photometric analysis

Type Ia supernovae (SN Ia) have provided the first evidence for an accelerating universe and for the existence of an unknown ``dark energy'' driving this expansion. The 5-year Supernova Legacy Survey (SNLS) will deliver \~700 type Ia…

Astrophysics · Physics 2019-08-14 N. Palanque-Delabrouille

SNLS Spectroscopy: Testing for Evolution in Type Ia Supernovae

Aims: We present a quantitative study of a new data set of high redshift Type Ia supernovae spectra, observed at the Gemini telescopes during the first 34 months of the Supernova Legacy Survey. During this time 123 supernovae candidates…

Astrophysics · Physics 2009-11-13 T. J. Bronder , I. M. Hook , P. Astier , D. Balam , C. Balland , S. Basa , R. G. Carlberg , A. Conley , D. Fouchez , J. Guy , D. A. Howell , J. D. Neill , R. Pain , K. Perrett , C. J. Pritchet , N. Regnault , M. Sullivan , S. Baumont , S. Fabbro , M. Filliol , S. Perlmutter , P. Ripoche

The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints

We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). These events were detected and their…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 J. Guy , M. Sullivan , A. Conley , N. Regnault , P. Astier , C. Balland , S. Basa , R. G. Carlberg , D. Fouchez , D. Hardin , I. M. Hook , D. A. Howell , R. Pain , N. Palanque-Delabrouille , K. M. Perrett , C. J. Pritchet , J. Rich , V. Ruhlmann-Kleider , D. Balam , S. Baumont , R. S. Ellis , S. Fabbro , H. K. Fakhouri , N. Fourmanoit , S. Gonzalez-Gaitan , M. L. Graham , E. Hsiao , T. Kronborg , C. Lidman , A. M. Mourao , S. Perlmutter , P. Ripoche , N. Suzuki , E. S. Walker

Real-time Analysis and Selection Biases in the Supernova Legacy Survey

The Supernova Legacy Survey (SNLS) has produced a high-quality, homogeneous sample of Type Ia supernovae (SNe Ia) out to redshifts greater than z=1. In its first four years of full operation (to June 2007), the SNLS discovered more than…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 K. Perrett , D. Balam , M. Sullivan , C. Pritchet , A. Conley , R. Carlberg , P. Astier , C. Balland , S. Basa , D. Fouchez , J. Guy , D. Hardin , I. M. Hook , D. A. Howell , R. Pain , N. Regnault

The ESO/VLT 3rd year Type Ia supernova data set from the Supernova Legacy Survey

We present 139 spectra of 124 Type Ia supernovae (SNeIa) that were observed at the ESO/VLT during the first three years of the Canada-France-Hawai Telescope (CFHT) Supernova Legacy Survey (SNLS). This homogeneous data set is used to test…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 C. Balland , S. Baumont , S. Basa , M. Mouchet , D. A. Howell , P. Astier , R. G. Carlberg , A. Conley , D. Fouchez , J. Guy , D. Hardin , I. M. Hook , R. Pain , K. Perrett , C. J. Pritchet , N. Regnault , J. Rich , M. Sullivan , P. Antilogus , V. Arsenijevic , J. Le Du , S. Fabbro , C. Lidman , A. Mourao , N. Palanque-Delabrouille , E. Pecontal , V. Ruhlmann-Kleider

Photometric Calibration of the Supernova Legacy Survey Fields

The 5-year project Supernova Legacy Survey (SNLS) delivers $\sim 100$ Type-Ia supernovae (SNe Ia) per year, in the redshift range $0.3 < z < 1.0$, with well-sampled $g'r'i'z'$ lightcurves. The SNLS Collaboration uses the 1 deg$^2$ Megacam…

Astrophysics · Physics 2007-05-23 N. Regnault

The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the…

Astrophysics · Physics 2015-01-27 P. Astier , J. Guy , N. Regnault , R. Pain , E. Aubourg , D. Balam , S. Basa , R. G. Carlberg , S. Fabbro , D. Fouchez , I. M. Hook , D. A. Howell , H. Lafoux , J. D. Neill , N. Palanque-Delabrouille , K. Perrett , C. J. Pritchet , J. Rich , M. Sullivan , R. Taillet , G. Aldering , P. Antilogus , V. Arsenijevic , C. Balland , S. Baumont , J. Bronder , H. Courtois , R. S. Ellis , M. Filiol , A. C. Goncalves , A. Goobar , D. Guide , D. Hardin , V. Lusset , C. Lidman , R. McMahon , M. Mouchet , A. Mourao , S. Perlmutter , P. Ripoche , C. Tao , N. Walton

Photometric selection of Type Ia supernovae in the Supernova Legacy Survey

We present a sample of 485 photometrically identified Type Ia supernova candidates mined from the first three years of data of the CFHT SuperNova Legacy Survey (SNLS). The images were submitted to a deferred processing independent of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 G. Bazin , V. Ruhlmann-Kleider , N. Palanque-Delabrouille , J. Rich , E. Aubourg , P. Astier , C. Balland , S. Basa , R. G. Carlberg , A. Conley , D. Fouchez , J. Guy , D. Hardin , I. M. Hook , D. A. Howell , R. Pain , K. Perrett , C. J. Pritchet , N. Regnault , M. Sullivan , N. Fourmanoit , S. Gonzalez-Gaitan , C. Lidman , S. Perlmutter , P. Ripoche , E. S. Walker

Search For Type Ia Supernova NUV-Optical Subclasses

In response to a recently reported observation of evidence for two classes of Type Ia Supernovae (SNe Ia) distinguished by their brightness in the rest-frame near ultraviolet (NUV), we search for the phenomenon in publicly available…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-16 David Cinabro , Daniel Scolnic , Richard Kessler , Ashley Li , Jake Miller

Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies

While many studies have shown a correlation between properties of the light curves of Type Ia SN (SNe Ia) and properties of their host galaxies, it remains unclear what is driving these correlations. We introduce a new direct method to…

Astrophysics of Galaxies · Physics 2020-06-17 D. Scolnic , M. Smith , A. Massiah , P. Wiseman , D. Brout , R. Kessler , T. M. Davis , R. J. Foley , L. Galbany , S. R. Hinton , R. Hounsell , L. Kelsey , C. Lidman , R. Morgan , R. C. Nichol , A. Möller , B. Popovic , M. Sako , M. Sullivan , B. P. Thomas , T. M. C. Abbott , M. Aguena , S. Allam , J. Annis , S. Avila , K. Bechtol , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , D. Carollo , M. Carrasco Kind , J. Carretero , M. Costanzi , L. N. da Costa , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , A. Drlica-Wagner , K. Eckert , T. F. Eifler , S. Everett , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , D. W. Gerdes , K. Glazebrook , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , W. G. Hartley , D. L. Hollowood , K. Honscheid , D. J. James , K. Kuehn , N. Kuropatkin , G. F. Lewis , T. S. Li , M. Lima , E. Macaulay , M. A. G. Maia , J. L. Marshall , F. Menanteau , R. Miquel , A. Palmese , F. Paz-Chinchón , A. A. Plazas , M. Pursiainen , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , N. E. Sommer , E. Suchyta , M. E. C. Swanson , G. Tarle , B. E. Tucker , T. N. Varga , A. R. Walker , R. Wilkinson

Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation

We report on work to increase the number of well-measured Type Ia supernovae (SNe Ia) at high redshifts. Light curves, including high signal-to-noise HST data, and spectra of six SNe Ia that were discovered during 2001 are presented.…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-15 R. Amanullah , C. Lidman , D. Rubin , G. Aldering , P. Astier , K. Barbary , M. S. Burns , A. Conley , K. S. Dawson , S. E. Deustua , M. Doi , S. Fabbro , L. Faccioli , H. K. Fakhouri , G. Folatelli , A. S. Fruchter , H. Furusawa , G. Garavini , G. Goldhaber , A. Goobar , D. E. Groom , I. Hook , D. A. Howell , N. Kashikawa , A. G. Kim , R. A. Knop , M. Kowalski , E. Linder , J. Meyers , T. Morokuma , S. Nobili , J. Nordin , P. E. Nugent , L. Ostman , R. Pain , N. Panagia , S. Perlmutter , J. Raux , P. Ruiz-Lapuente , A. L. Spadafora , M. Strovink , N. Suzuki , L. Wang , W. M. Wood-Vasey , N. Yasuda

The Dark Energy Survey 5-year photometrically identified Type Ia Supernovae

As part of the cosmology analysis using Type Ia Supernovae (SN Ia) in the Dark Energy Survey (DES), we present photometrically identified SN Ia samples using multi-band light-curves and host galaxy redshifts. For this analysis, we use the…

Cosmology and Nongalactic Astrophysics · Physics 2022-07-21 A. Möller , M. Smith , M. Sako , M. Sullivan , M. Vincenzi , P. Wiseman , P. Armstrong , J. Asorey , D. Brout , D. Carollo , T. M. Davis , C. Frohmaier , L. Galbany , K. Glazebrook , L. Kelsey , R. Kessler , G. F. Lewis , C. Lidman , U. Malik , R. C. Nichol , D. Scolnic , B. E. Tucker , T. M. C. Abbott , M. Aguena , S. Allam , J. Annis , E. Bertin , S. Bocquet , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , C. Conselice , M. Costanzi , M. Crocce , L. N. da Costa , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , S. Everett , I. Ferrero , D. A. Finley , B. Flaugher , D. Friedel , J. Frieman , J. García-Bellido , D. W. Gerdes , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , M. March , J. L. Marshall , F. Menanteau , R. Miquel , R. Morgan , A. Palmese , F. Paz-Chinchón , A. Pieres , A. A. Plazas Malagón , A. K. Romer , A. Roodman , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga

Photometric classification of type Ia supernovae in the SuperNova Legacy Survey with supervised learning

In the era of large astronomical surveys, photometric classification of supernovae (SNe) has become an important research field due to limited spectroscopic resources for candidate follow-up and classification. In this work, we present a…

Instrumentation and Methods for Astrophysics · Physics 2016-12-14 A. Möller , V. Ruhlmann-Kleider , C. Leloup , J. Neveu , N. Palanque-Delabrouille , J. Rich , R. Carlberg , C. Lidman , C. Pritchet

The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties

We present the full Hubble diagram of photometrically-classified Type Ia supernovae (SNe Ia) from the Dark Energy Survey supernova program (DES-SN). DES-SN discovered more than 20,000 SN candidates and obtained spectroscopic redshifts of…

Cosmology and Nongalactic Astrophysics · Physics 2024-01-24 M. Vincenzi , D. Brout , P. Armstrong , B. Popovic , G. Taylor , M. Acevedo , R. Camilleri , R. Chen , T. M. Davis , S. R. Hinton , L. Kelsey , R. Kessler , J. Lee , C. Lidman , A. Möller , H. Qu , M. Sako , B. Sanchez , D. Scolnic , M. Smith , M. Sullivan , P. Wiseman , J. Asorey , B. A. Bassett , D. Carollo , A. Carr , R. J. Foley , C. Frohmaier , L. Galbany , K. Glazebrook , O. Graur , E. Kovacs , K. Kuehn , U. Malik , R. C. Nichol , B. Rose , B. E. Tucker , M. Toy , D. L. Tucker , F. Yuan , T. M. C. Abbott , M. Aguena , O. Alves , F. Andrade-Oliveira , J. Annis , D. Bacon , K. Bechtol , G. M. Bernstein , D. Brooks , D. L. Burke , A. Carnero Rosell , J. Carretero , F. J. Castander , C. Conselice , L. N. da Costa , M. E. S. Pereira , S. Desai , H. T. Diehl , P. Doel , I. Ferrero , B. Flaugher , D. Friedel , J. Frieman , J. García-Bellido , M. Gatti , G. Giannini , D. Gruen , R. A. Gruendl , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , N. Kuropatkin , O. Lahav , S. Lee , H. Lin , J. L. Marshall , J. Mena-Fernández , F. Menanteau , R. Miquel , A. Palmese , A. Pieres , A. A. Plazas Malagón , A. Porredon , A. K. Romer , A. Roodman , E. Sanchez , D. Sanchez Cid , M. Schubnell , I. Sevilla-Noarbe , E. Suchyta , M. E. C. Swanson , G. Tarle , C. To , A. R. Walker , N. Weaverdyck

Measuring the Properties of Dark Energy with Photometrically Classified Pan-STARRS Supernovae. I. Systematic Uncertainty from Core-Collapse Supernova Contamination

The Pan-STARRS (PS1) Medium Deep Survey discovered over 5,000 likely supernovae (SNe) but obtained spectral classifications for just 10% of its SN candidates. We measured spectroscopic host galaxy redshifts for 3,147 of these likely SNe and…

Cosmology and Nongalactic Astrophysics · Physics 2017-07-05 D. O. Jones , D. M. Scolnic , A. G. Riess , R. Kessler , A. Rest , R. P. Kirshner , E. Berger , C. A. Ortega , R. J. Foley , R. Chornock , P. J. Challis , W. S. Burgett , K. C. Chambers , P. W. Draper , H. Flewelling , M. E. Huber , N. Kaiser , R. -P. Kudritzki , N. Metcalfe , R. J. Wainscoat , C. Waters

ZTF SN Ia DR2: The spectral diversity of Type Ia supernovae in a volume-limited sample

More than 3000 spectroscopically confirmed Type Ia supernovae (SNe Ia) are presented in the Zwicky Transient Facility SN Ia Data Release 2 (ZTF DR2). In this paper, we detail the spectral properties of 482 SNe Ia near maximum light, up to a…

High Energy Astrophysical Phenomena · Physics 2025-08-18 U. Burgaz , K. Maguire , G. Dimitriadis , L. Harvey , R. Senzel , J. Sollerman , J. Nordin , L. Galbany , M. Rigault , M. Smith , A. Goobar , J. Johansson , P. Rosnet , M. Amenouche , M. Deckers , S. Dhawan , M. Ginolin , Y. -L. Kim , A. A. Miller , T. E. Muller-Bravo , P. E. Nugent , J. H. Terwel , R. Dekany , A. Drake , M. J. Graham , S. L. Groom , M. M. Kasliwal , S. R. Kulkarni , K. Nolan , G. Nir , R. L. Riddle , B. Rusholme , Y. Sharma