Related papers: Cosmological Parameter Uncertainties from SALT-II …

First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases

We describe catalog-level simulations of Type Ia supernova (SN~Ia) light curves in the Dark Energy Survey Supernova Program (DES-SN), and in low-redshift samples from the Center for Astrophysics (CfA) and the Carnegie Supernova Project…

Cosmology and Nongalactic Astrophysics · Physics 2019-05-13 R. Kessler , D. Brout , C. B. D'Andrea , T. M. Davis , S. R. Hinton , A. G. Kim , J. Lasker , C. Lidman , E. Macaulay , A. Möller , M. Sako , D. Scolnic , M. Smith , M. Sullivan , B. Zhang , P. Andersen , J. Asorey , A. Avelino , J. Calcino , D. Carollo , P. Challis , M. Childress , A. Clocchiatti , S. Crawford , A. V. Filippenko , R. J. Foley , K. Glazebrook , J. K. Hoormann , E. Kasai , R. P. Kirshner , G. F. Lewis , K. S. Mandel , M. March , E. Morganson , D. Muthukrishna , P. Nugent , Y. -C. Pan , N. E. Sommer , E. Swann , R. C. Thomas , B. E. Tucker , S. A. Uddin , T. M. C. Abbott , S. Allam , J. Annis , S. Avila , M. Banerji , K. Bechtol , E. Bertin , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , M. Crocce , L. N. da Costa , C. Davis , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , T. F. Eifler , B. Flaugher , P. Fosalba , J. Frieman , J. Garcia-Bellido , E. Gaztanaga , D. W. Gerdes , D. Gruen , R. A. Gruendl , G. Gutierrez , W. G. Hartley , D. L. Hollowood , K. Honscheid , D. J. James , M. W. G. Johnson , M. D. Johnson , E. Krause , K. Kuehn , N. Kuropatkin , O. Lahav , T. S. Li , M. Lima , J. L. Marshall , P. Martini , F. Menanteau , C. J. Miller , R. Miquel , B. Nord , A. A. Plazas , A. Roodman , E. Sanchez , V. Scarpine , R. Schindler , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , M. Soares-Santos , F. Sobreira , E. Suchyta , G. Tarle , D. Thomas , A. R. Walker , Y. Zhang

ZTF SN Ia DR2: Improved SN Ia colors through expanded dimensionality with SALT3+

Type Ia supernovae (SNe Ia) are a key probe in modern cosmology, as they can be used to measure luminosity distances at gigaparsec scales. Models of their light-curves are used to project heterogeneous observed data onto a common basis for…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-14 W. D. Kenworthy , A. Goobar , D. O. Jones , J. Johansson , S. Thorp , R. Kessler , U. Burgaz , S. Dhawan , G. Dimitriadis , L. Galbany , M. Ginolin , Y. -L. Kim , K. Maguire , T. E. Müller-Bravo , P. Nugent , J. Nordin , B. Popovic , P. J. Pessi , M. Rigault , P. Rosnet , J. Sollerman , J. H. Terwel , A. Townsend , R. R. Laher , J. Purdum , D. Rosselli , B. Rusholme

First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation

We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified type Ia supernovae (SNe Ia) from the first three years of the Dark Energy Survey Supernova Program (DES-SN), spanning a…

Cosmology and Nongalactic Astrophysics · Physics 2019-06-04 D. Brout , D. Scolnic , R. Kessler , C. B. D'Andrea , T. M. Davis , R. R. Gupta , S. R. Hinton , A. G. Kim , J. Lasker , C. Lidman , E. Macaulay , A. Möller , R. C. Nichol , M. Sako , M. Smith , M. Sullivan , B. Zhang , P. Andersen , J. Asorey , A. Avelino , B. A. Bassett , P. Brown , J. Calcino , D. Carollo , P. Challis , M. Childress , A. Clocchiatti , A. V. Filippenko , R. J. Foley , L. Galbany , K. Glazebrook , J. K. Hoormann , E. Kasai , R. P. Kirshner , K. Kuehn , S. Kuhlmann , G. F. Lewis , K. S. Mandel , M. March , V. Miranda , E. Morganson , D. Muthukrishna , P. Nugent , A. Palmese , Y. -C. Pan , R. Sharp , N. E. Sommer , E. Swann , R. C. Thomas , B. E. Tucker , S. A. Uddin , W. Wester , T. M. C. Abbott , S. Allam , J. Annis , S. Avila , K. Bechtol , G. M. Bernstein , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , C. E. Cunha , L. N. da Costa , C. Davis , J. De Vicente , D. L. DePoy , S. Desai , H. T. Diehl , P. Doel , A. Drlica-Wagner , T. F. Eifler , J. Estrada , E. Fernandez , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , D. Gruen , R. A. Gruendl , G. Gutierrez , W. G. Hartley , D. L. Hollowood , K. Honscheid , B. Hoyle , D. J. James , M. Jarvis , T. Jeltema , E. Krause , O. Lahav , T. S. Li , M. Lima , M. A. G. Maia , J. Marriner , J. L. Marshall , P. Martini , F. Menanteau , C. J. Miller , R. Miquel , R. L. C. Ogando , A. A. Plazas , A. K. Romer , A. Roodman , E. S. Rykoff , E. Sanchez , B. Santiago , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , R. C. Smith , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , M. A. Troxel , D. L. Tucker , V. Vikram , A. R. Walker , Y. Zhang

Propagating Uncertainties in the SALT3 Model Training Process to Cosmological Constraints

Type Ia supernovae (SNe Ia) are standardizable candles that must be modeled empirically to yield cosmological constraints. To understand the robustness of this modeling to variations in the model training procedure, we build an end-to-end…

Cosmology and Nongalactic Astrophysics · Physics 2024-01-22 M. Dai , D. O. Jones , W. D. Kenworthy , R. Kessler , J. D. R. Pierel , R. J. Foley , S. W. Jha , D. M. Scolnic

The Dark Energy Survey Supernova Program: Cosmological biases from supernova photometric classification

Cosmological analyses of samples of photometrically-identified Type Ia supernovae (SNe Ia) depend on understanding the effects of 'contamination' from core-collapse and peculiar SN Ia events. We employ a rigorous analysis on…

Cosmology and Nongalactic Astrophysics · Physics 2022-06-15 M. Vincenzi , M. Sullivan , A. Möller , P. Armstrong , B. A. Bassett , D. Brout , D. Carollo , A. Carr , T. M. Davis , C. Frohmaier , L. Galbany , K. Glazebrook , O. Graur , L. Kelsey , R. Kessler , E. Kovacs , G. F. Lewis , C. Lidman , U. Malik , R. C. Nichol , B. Popovic , M. Sako , D. Scolnic , M. Smith , G. Taylor , B. E. Tucker , P. Wiseman , M. Aguena , S. Allam , J. Annis , J. Asorey , D. Bacon , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , J. Carretero , F. J. Castander , M. Costanzi , L. N. da Costa , M. E. S. Pereira , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , S. Everett , I. Ferrero , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , D. W. Gerdes , D. Gruen , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , T. S. Li , M. Lima , M. A. G. Maia , J. L. Marshall , R. Miquel , R. Morgan , R. L. C. Ogando , A. Palmese , F. Paz-Chinchón , A. Pieres , A. A. Plazas Malagón , K. Reil , A. Roodman , E. Sanchez , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , E. Suchyta , G. Tarle , C. To , T. N. Varga , J. Weller , R. D. Wilkinson

Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters

For spectroscopically confirmed Type Ia supernovae we evaluate models of intrinsic brightness variations with detailed data/Monte Carlo comparisons of the dispersion in the following quantities: Hubble-diagram scatter, color difference…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Richard Kessler , Julien Guy , John Marriner , Marc Betoule , Jon Brinkmann , David Cinabro , Patrick El-Hage , Joshua Frieman , Saurabh Jha , Jennifer Mosher , Donald P. Schneider

Training Custom Light Curve Models of SN Ia Sub-Populations Selected According to Host Galaxy Properties

Type Ia supernova (SN Ia) cosmology analyses include a luminosity step function in their distance standardization process to account for an observed yet unexplained difference in the post-standardization luminosities of SNe Ia originating…

Cosmology and Nongalactic Astrophysics · Physics 2024-01-17 G. Taylor , C. Lidman , B. Popovic , H. Abbot

ZTF SN Ia DR2: Study of Type Ia Supernova lightcurve fits

Type Ia supernova (SN Ia) cosmology relies on the estimation of lightcurve parameters to derive precision distances that leads to the estimation of cosmological parameters. The empirical SALT2 lightcurve modeling that relies on only two…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-19 M. Rigault , M. Smith , N. Regnault , D. W. Kenworthy , K. Maguire , A. Goobar , G. Dimitriadis , M. Amenouche , M. Aubert , C. Barjou-Delayre , C. E. Bellm , U. Burgaz , B. Carreres , Y. Copin , M. Deckers , T. de Jaeger , S. Dhawan , F. Feinstein , D. Fouchez , L. Galbany , M. Ginolin , J. M. Graham , Y. -L. Kim , M. Kowalski , D. Kuhn , R. S. Kulkarni , E. T. Muller-Bravo , K. Nordin , M. Popovic , J. Purdum , P. Rosnet , D. Rosselli , B. Racine , F. Ruppin , J. Sollerman , H. J. Terwel , A. Townsend

Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples

We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. The data set includes several low-redshift samples (z<0.1), all 3 seasons from the SDSS-II…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 M. Betoule , R. Kessler , J. Guy , J. Mosher , D. Hardin , R. Biswas , P. Astier , P. El-Hage , M. Konig , S. Kuhlmann , J. Marriner , R. Pain , N. Regnault , C. Balland , B. A. Bassett , P. J. Brown , H. Campbell , R. G. Carlberg , F. Cellier-Holzem , D. Cinabro , A. Conley , C. B. D'Andrea , D. L. DePoy , M. Doi , R. S. Ellis , S. Fabbro , A. V. Filippenko , R. J. Foley , J. A. Frieman , D. Fouchez , L. Galbany , A. Goobar , R. R. Gupta , G. J. Hill , R. Hlozek , C. J. Hogan , I. M. Hook , D. A. Howell , S. W. Jha , L. Le Guillou , G. Leloudas , C. Lidman , J. L. Marshall , A. Möller , A. M. Mourão , J. Neveu , R. Nichol , M. D. Olmstead , N. Palanque-Delabrouille , S. Perlmutter , J. L. Prieto , C. J. Pritchet , M. Richmond , A. G. Riess , V. Ruhlmann-Kleider , M. Sako , K. Schahmaneche , D. P. Schneider , M. Smith , J. Sollerman , M. Sullivan , N. A. Walton , C. J. Wheeler

Type Ia supernova parameter estimation: a comparison of two approaches using current datasets

By using the Sloan Digital Sky Survey (SDSS) first year type Ia supernova (SN Ia) compilation, we compare two different approaches (traditional \chi^2 and complete likelihood) to determine parameter constraints when the magnitude dispersion…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 B. L. Lago , M. O. Calvão , S. E. Jorás , R. R. R. Reis , I. Waga , R. Giostri

SALT2 Versus SALT3: Updated Model Surfaces and Their Impacts on Type Ia Supernova Cosmology

For the past decade, SALT2 has been the most common model used to fit Type Ia supernova (SN Ia) light curves for dark energy analyses. Recently, the SALT3 model was released, which upgraded a number of model features but has not yet been…

Cosmology and Nongalactic Astrophysics · Physics 2023-02-08 G. Taylor , D. O. Jones , B. Popovic , M. Vincenzi , R. Kessler , D. Scolnic , M. Dai , W. D. Kenworthy , J. D. R. Pierel

Assessment of the Systematic Uncertainties in the Cosmological Analysis of the SDSS Supernovae Photometric Sample

Improvement in the precision of measurements of cosmological parameters with Type Ia Supernovae (SNIa) is expected to come from large photometrically identified (photometric) SN samples. Here we re-analyse the SDSS photometric SN sample,…

Cosmology and Nongalactic Astrophysics · Physics 2020-03-04 Brodie Popovic , Dan Scolnic , Richard Kessler

Incorporating Astrophysical Systematics into a Generalized Likelihood for Cosmology with Type Ia Supernovae

Traditional cosmological inference using Type Ia supernovae (SNeIa) have used stretch- and color-corrected fits of SN Ia light curves and assumed a resulting fiducial mean and symmetric intrinsic dispersion for the resulting relative…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-17 Kara A. Ponder , W. Michael Wood-Vasey , Andrew R. Zentner

Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves

We combine the CfA3 supernova Type Ia (SN Ia) sample with samples from the literature to calculate improved constraints on the dark energy equation of state parameter, w. The CfA3 sample is added to the Union set of Kowalski et al. (2008)…

Cosmology and Nongalactic Astrophysics · Physics 2009-07-22 Malcolm Hicken , W. Michael Wood-Vasey , Stephane Blondin , Peter Challis , Saurabh Jha , Patrick L. Kelly , Armin Rest , Robert P. Kirshner

Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters

We use 1169 Pan-STARRS supernovae (SNe) and 195 low-$z$ ($z < 0.1$) SNe Ia to measure cosmological parameters. Though most Pan-STARRS SNe lack spectroscopic classifications, in a previous paper (I) we demonstrated that photometrically…

Cosmology and Nongalactic Astrophysics · Physics 2018-04-25 D. O. Jones , D. M. Scolnic , A. G. Riess , A. Rest , R. P. Kirshner , E. Berger , R. Kessler , Y. -C. Pan , R. J. Foley , R. Chornock , C. A. Ortega , P. J. Challis , W. S. Burgett , K. C. Chambers , P. W. Draper , H. Flewelling , M. E. Huber , N. Kaiser , R. -P. Kudritzki , N. Metcalfe , J. Tonry , R. J. Wainscoat , C. Waters , E. E. E. Gall , R. Kotak , M. McCrum , S. J. Smartt , K. W. Smith

Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample

We probe the systematic uncertainties from 113 Type Ia supernovae (SNIa) in the Pan-STARRS1 (PS1) sample along with 197 SN Ia from a combination of low-redshift surveys. The companion paper by Rest et al. (2013) describes the photometric…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 D. Scolnic , A. Rest , A. Riess , M. E. Huber , R. J. Foley , D. Brout , R. Chornock , G. Narayan , J. L. Tonry , E. Berger , A. M. Soderberg , C. W. Stubbs , R. P. Kirshner , S. Rodney , S. J. Smartt , E. Schlafly , M. T. Botticella , P. Challis , I. Czekal , M. Drout , M. J. Hudson , R. Kotak , C. Leibler , R. Lunnan , G. H. Marion , M. McCrum , D. Milisavljevic , A. Pastorello , N. E. Sanders , K. Smith , E. Stafford , D. Thilker , S. Valenti , W. M. Wood-Vasey , Z. Zheng , W. S. Burgett , K. C. Chambers , L. Denneau , P. W. Draper , H. Flewelling , K. W. Hodapp , N. Kaiser , R. P. Kudritzki , E. A. Magnier , N. Metcalfe , P. A. Price , W. Sweeney , R. Wainscoat , C. Waters

Cosmology with Photometrically-Classified Type Ia Supernovae from the SDSS-II Supernova Survey

We present the cosmological analysis of 752 photometrically-classified Type Ia Supernovae (SNe Ia) obtained from the full Sloan Digital Sky Survey II (SDSS-II) Supernova (SN) Survey, supplemented with host-galaxy spectroscopy from the…

Cosmology and Nongalactic Astrophysics · Physics 2013-08-05 Heather Campbell , Chris B. D'Andrea , Robert C. Nichol , Masao Sako , Mathew Smith , Hubert Lampeitl , Matthew D. Olmstead , Bruce Bassett , Rahul Biswas , Peter Brown , David Cinabro , Kyle S. Dawson , Ben Dilday , Ryan J. Foley , Joshua A. Frieman , Peter Garnavich , Renee Hlozek , Saurabh W. Jha , Steve Kuhlmann , Martin Kunz , John Marriner , Ramon Miquel , Michael Richmond , Adam Riess , Donald P. Schneider , Jesper Sollerman , Matt Taylor , Gong-Bo Zhao

Comparison of cosmological parameter inference methods applied to supernovae lightcurves fitted with SALT2

We present a comparison of two methods for cosmological parameter inference from supernovae Ia lightcurves fitted with the SALT2 technique. The standard chi-square methodology and the recently proposed Bayesian hierarchical method (BHM) are…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 M. C. March , N. V. Karpenka , F. Feroz , M. P. Hobson

First-year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Hubble Diagram and Cosmological Parameters

We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. These data fill in…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Richard Kessler , Andrew Becker , David Cinabro , Jake Vanderplas , Joshua A. Frieman , John Marriner , Tamara M Davis , Benjamin Dilday , Jon Holtzman , Saurabh Jha , Hubert Lampeitl , Masao Sako , Mathew Smith , Chen Zheng , Robert C. Nichol , Bruce Bassett , Ralf Bender , Darren L. Depoy , Mamoru Doi , Ed Elson , Alex V. Filippenko , Ryan J. Foley , Peter M. Garnavich , Ulrich Hopp , Yutaka Ihara , William Ketzeback , W. Kollatschny , Kohki Konishi , Jennifer L. Marshall , Russet J. McMillan , Gajus Miknaitis , Tomoki Morokuma , Edvard M"ortsell , Kaike Pan , Jose Luis Prieto , Michael W. Richmond , Adam G. Riess , Roger Romani , Donald P. Schneider , Jesper Sollerman , Naohiro Takanashi , Kouichi Tokita , Kurt van der Heyden , J. C. Wheeler , Naoki Yasuda , Donald York

First-Year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Constraints on Non-Standard Cosmological Models

We use the new SNe Ia discovered by the SDSS-II Supernova Survey together with additional supernova datasets as well as observations of the cosmic microwave background and baryon acoustic oscillations to constrain cosmological models. This…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 J. Sollerman , E. Mörtsell , T. M. Davis , M. Blomqvist , B. Bassett , A. C. Becker , D. Cinabro , A. V. Filippenko , R. J. Foley , J. Frieman , P. Garnavich , H. Lampeitl , J. Marriner , R. Miquel , R. C. Nichol , M. W. Richmond , M. Sako , D. P. Schneider , M. Smith , J. T. Vanderplas , J. C. Wheeler