Related papers: Cosmological Parameter Uncertainties from SALT-II …

The Dark Energy Survey Supernova Program: Modelling selection efficiency and observed core collapse supernova contamination

The analysis of current and future cosmological surveys of type Ia supernovae (SNe Ia) at high-redshift depends on the accurate photometric classification of the SN events detected. Generating realistic simulations of photometric SN surveys…

Cosmology and Nongalactic Astrophysics · Physics 2021-07-14 M. Vincenzi , M. Sullivan , O. Graur , D. Brout , T. M. Davis , C. Frohmaier , L. Galbany , C. P. Gutiérrez , S. R. Hinton , R. Hounsell , L. Kelsey , R. Kessler , E. Kovacs , S. Kuhlmann , J. Lasker , C. Lidman , A. Möller , R. C. Nichol , M. Sako , D. Scolnic , M. Smith , E. Swann , P. Wiseman , J. Asorey , G. F. Lewis , R. Sharp , B. E. Tucker , M. Aguena , S. Allam , S. Avila , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , A. Choi , M. Costanzi , L. N. da Costa , M. E. S. Pereira , J. De Vicente , S. Desai , H. T. Diehl , P. Doel , S. Everett , I. Ferrero , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , D. W. Gerdes , D. Gruen , R. A. Gruendl , G. Gutierrez , D. L. Hollowood , K. Honscheid , B. Hoyle , D. J. James , K. Kuehn , N. Kuropatkin , M. A. G. Maia , P. Martini , F. Menanteau , R. Miquel , R. Morgan , A. Palmese , F. Paz-Chinchón , A. A. Plazas , A. K. Romer , E. Sanchez , V. Scarpine , S. Serrano , I. Sevilla-Noarbe , M. Soares-Santos , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga , A. R. Walker , R. D. Wilkinson

Characterizing the Sample Selection for Supernova Cosmology

Type Ia supernovae (SNe Ia) are used as distance indicators to infer the cosmological parameters that specify the expansion history of the universe. Parameter inference depends on the criteria by which the analysis SN sample is selected.…

Cosmology and Nongalactic Astrophysics · Physics 2021-02-19 Alex G. Kim

BAHAMAS: new SNIa analysis reveals inconsistencies with standard cosmology

We present results obtained by applying our BAyesian HierArchical Modeling for the Analysis of Supernova cosmology (BAHAMAS) software package to the 740 spectroscopically confirmed supernovae type Ia (SNIa) from the "Joint Light-curve…

Cosmology and Nongalactic Astrophysics · Physics 2016-09-21 H. Shariff , X. Jiao , R. Trotta , D. A. van Dyk

Feeling Blue: Constructing a Robust SALT3 UV Template and Constraining its Redshift Dependency

Upcoming cosmological surveys will obtain numerous rest-frame ultraviolet (UV) observations of Type Ia supernovae (SNe Ia), yet there is concern about how standardizable SNe Ia are in the UV. In this work, we train a robust optical--UV SED…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-05 Qinan Wang , David O. Jones , Justin D. R. Pierel , Matthew R. Siebert , W. D'Arcy Kenworthy , Richard Kessler , Mi Dai , Ryan J. Foley , Ori D. Fox , Suvi Gezari , Sebastian Gomez , Peter McGill , Armin Rest , César Rojas-Bravo , Melissa Shahbandeh , Lou Strolger

ZTF SN~Ia DR2: Cosmology-independent constraints on Type Ia supernova standardisation from supernova siblings

Understanding Type Ia supernovae (SNe~Ia) and the empirical standardisation relations that make them excellent distance indicators is vital to improving cosmological constraints. SN~Ia ``siblings", i.e. two or more SNe~Ia in the same host…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-29 S. Dhawan , E. Mortsell , J. Johansson , A. Goobar , M. Rigault , M. Smith , K. Maguire , J. Nordin , G. Dimitriadis , P. E. Nugent , L. Galbany , J. Sollerman , T. de Jaeger , J. H. Terwel , Y. -L. Kim , Umut Burgaz , G. Helou , J. Purdum , S. L. Groom , R. Laher , B. Healy

The First Data Release of CNIa0.02 -- A Complete Nearby (Redshift <0.02) Sample of Type Ia Supernova Light Curves

The CNIa0.02 project aims to collect a complete, nearby sample of Type Ia supernovae (SNe Ia) light curves, and the SNe are volume-limited with host-galaxy redshifts z_host < 0.02. The main scientific goal is to infer the distributions of…

High Energy Astrophysical Phenomena · Physics 2022-12-29 Ping Chen , Subo Dong , C. S. Kochanek , K. Z. Stanek , R. S. Post , M. D. Stritzinger , J. L. Prieto , Alexei V. Filippenko , Juna A. Kollmeier , N. Elias-Rosa , Boaz Katz , Lina Tomasella , S. Bose , Chris Ashall , S. Benetti , D. Bersier , Joseph Brimacombe , Thomas G. Brink , P. Brown , David A. H. Buckley , Enrico Cappellaro , Grant W. Christie , Morgan Fraser , Mariusz Gromadzki , Thomas W. -S. Holoien , Shaoming Hu , Erkki Kankare , Robert Koff , P. Lundqvist , S. Mattila , P. A. Milne , Nidia Morrell , J. A. Munoz , Robert Mutel , Tim Natusch , Joel Nicolas , A. Pastorello , Simon Prentice , Tyler Roth , B. J. Shappee , Geoffrey Stone , Todd A. Thompson , Steven Villanueva , WeiKang Zheng

The Pantheon+ Analysis: Cosmological Constraints

We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves of 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift from $z=0.001$ to 2.26. This work features an increased sample size,…

Cosmology and Nongalactic Astrophysics · Physics 2022-11-16 Dillon Brout , Dan Scolnic , Brodie Popovic , Adam G. Riess , Joe Zuntz , Rick Kessler , Anthony Carr , Tamara M. Davis , Samuel Hinton , David Jones , W. D'Arcy Kenworthy , Erik R. Peterson , Khaled Said , Georgie Taylor , Noor Ali , Patrick Armstrong , Pranav Charvu , Arianna Dwomoh , Antonella Palmese , Helen Qu , Benjamin M. Rose , Christopher W. Stubbs , Maria Vincenzi , Charlotte M. Wood , Peter J. Brown , Rebecca Chen , Ken Chambers , David A. Coulter , Mi Dai , Georgios Dimitriadis , Alexei V. Filippenko , Ryan J. Foley , Saurabh W. Jha , Lisa Kelsey , Robert P. Kirshner , Anais Möller , Jessie Muir , Seshadri Nadathur , Yen-Chen Pan , Armin Rest , Cesar Rojas-Bravo , Masao Sako , Matthew R. Siebert , Mat Smith , Benjamin E. Stahl , Phil Wiseman

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

The Dark Energy Survey Supernova Program: A Reanalysis Of Cosmology Results And Evidence For Evolving Dark Energy With An Updated Type Ia Supernova Calibration

We present improved cosmological constraints from a re-analysis of the Dark Energy Survey (DES) 5-year sample of Type Ia supernovae (DES-SN5YR). This re-analysis includes an improved photometric cross-calibration, recent white dwarf…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-06 B. Popovic , P. Shah , W. D. Kenworthy , R. Kessler , T. M. Davis , A. Goobar , D. Scolnic , M. Vincenzi , P. Wiseman , R. Chen , E. Charleton , M. Acevedo , P. Armstrong , B. M. Boyd , D. Brout , R. Camilleri , J. Frieman , L. Galbany , M. Grayling , L. Kelsey , B. Rose , B. Sánchez , J. Lee , A. Möller , M. Smith , M. Sullivan , N. Shiamtanis , A. Alarcon , S. S. Allam , F. Andrade-Oliveira , S. Avila , D. Bacon , J. Blazek , S. Bocquet , D. Brooks , D. L. Burke , A. Carnero Rosell , J. Carretero , R. Cawthon , L. N. da Costa , M. E. da Silva Pereira , H. T. Diehl , S. Dodelson , P. Doel , S. Everett , C. Frohmaier , J. García-Bellido , D. Gruen , G. Gutierrez , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , D. J. James , N. Jeffrey , K. Kuehn , O. Lahav , S. Lee , C. Lidman , J. L. Marshall , J. Mena-Fernández , F. Menanteau , R. Miquel , J. Muir , J. Myles , R. L. C. Ogando , M. Paterno , A. A. Plazas Malagón , A. Porredon , J. Prat , R. C. Nichol , A. K. Romer , A. Roodman , E. Sanchez , D. Sanchez Cid , I. Sevilla-Noarbe , E. Suchyta , M. E. C. Swanson , C. To , D. L. Tucker , A. R. Walker , N. Weaverdyck

Accounting for Selection Effects in Supernova Cosmology with Simulation-Based Inference and Hierarchical Bayesian Modelling

Type Ia supernovae (SNe Ia) are thermonuclear exploding stars that can be used to put constraints on the nature of our universe. One challenge with population analyses of SNe Ia is Malmquist bias, where we preferentially observe the…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-24 Benjamin M. Boyd , Matthew Grayling , Stephen Thorp , Kaisey S. Mandel

Photometric Supernova Cosmology with BEAMS and SDSS-II

Supernova cosmology without spectroscopic confirmation is an exciting new frontier which we address here with the Bayesian Estimation Applied to Multiple Species (BEAMS) algorithm and the full three years of data from the Sloan Digital Sky…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Renée Hlozek , Martin Kunz , Bruce Bassett , Mat Smith , James Newling , Melvin Varughese , Rick Kessler , Joe Bernstein , Heather Campbell , Ben Dilday , Bridget Falck , Joshua Frieman , Steve Kulhmann , Hubert Lampeitl , John Marriner , Robert C. Nichol , Adam G. Riess , Masao Sako , Donald P. Schneider

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

On the Mechanism of Type Ia Supernovae

Type Ia supernovae (SNe Ia) are one of the major tools to determine the cosmological parameters. Utilizing them as distance indicators, it is possible to geometrically survey the universe. To this end, the intrinsic scatter in the…

Astrophysics · Physics 2007-05-23 F. K. Roepke , W. Hillebrandt , S. I. Blinnikov

The first Hubble diagram and cosmological constraints using superluminous supernova

We present the first Hubble diagram of superluminous supernovae (SLSNe) out to a redshift of two, together with constraints on the matter density, $\Omega_{\rm M}$, and the dark energy equation-of-state parameter, $w(\equiv p/\rho)$. We…

Cosmology and Nongalactic Astrophysics · Physics 2021-04-12 C. Inserra , M. Sullivan , C. R. Angus , E. Macaulay , R. C. Nichol , M. Smith , C. Frohmaier , C. P. Gutiérrez , M. Vicenzi , A. Möller , D. Brout , P. J. Brown , T. M. Davis , C. B. D'Andrea , L. Galbany , R. Kessler , A. G. Kim , Y. -C. Pan , M. Pursiainen , D. Scolnic , B. P. Thomas , P. Wiseman , T. M. C. Abbott , J. Annis , S. Avila , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , R. Cawthon , S. Desai , H. T. Diehl , T. F. Eifler , D. A. Finley , B. Flaugher , P. Fosalba , J. Frieman , J. Garcia-Bellido , E. Gaztanaga , D. W. Gerdes , T. Giannantonio , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , D. L. Hollowood , K. Honscheid , D. J. James , E. Krause , K. Kuehn , N. Kuropatkin , T. S. Li , C. Lidman , M. Lima , M. A. G. Maia , J. L. Marshall , P. Martini , F. Menanteau , R. Miquel , A. A. Plazas Malagón , A. K. Romer , A. Roodman , M. Sako , E. Sanchez , V. Scarpine , M. Schubnell , S. Serrano , I. Sevilla-Noarbe , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , D. L. Tucker , V. Vikram , A. R. Walker , Y. Zhang , J. Asorey , J. Calcino , D. Carollo , K. Glazebrook , S. R. Hinton , J. K. Hoormann , G. F. Lewis , R. Sharp , E. Swann , B. E. Tucker

Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples

We present a new technique to create a bin-averaged Hubble Diagram (HD) from photometrically identified SN~Ia data. The resulting HD is corrected for selection biases and contamination from core collapse (CC) SNe, and can be used to infer…

Cosmology and Nongalactic Astrophysics · Physics 2017-02-15 Richard Kessler , Dan Scolnic

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

Towards the Future of Supernova Cosmology

For future surveys, spectroscopic follow-up for all supernovae will be extremely difficult. However, one can use light curve fitters, to obtain the probability that an object is a Type Ia. One may consider applying a probability cut to the…

Cosmology and Nongalactic Astrophysics · Physics 2014-10-24 Michelle Lochner , Bruce A. Bassett , Melvin Varughese , Renée Hlozek , Martin Kunz , Mat Smith , James Newling

Supernovae as probes of cosmic parameters: estimating the bias from under-dense lines of sight

Correctly interpreting observations of sources such as type Ia supernovae (SNe Ia) require knowledge of the power spectrum of matter on AU scales - which is very hard to model accurately. Because under-dense regions account for much of the…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-22 V. C. Busti , R. F. L. Holanda , C. Clarkson

Constraints on CDM cosmology from galaxy power spectrum, CMB and SNIa evolution

We examine the constraints that can be obtained on standard cold dark matter models from the most currently used data set: CMB anisotropies, type Ia supernovae and the SDSS luminous red galaxies. We also examine how these constraints are…

Astrophysics · Physics 2015-05-13 L. D. Ferramacho , A. Blanchard , Y. Zolnierowski

Type Ia Supernova Light Curve Inference: Hierarchical Bayesian Analysis in the Near Infrared

We present a comprehensive statistical analysis of the properties of Type Ia SN light curves in the near infrared using recent data from PAIRITEL and the literature. We construct a hierarchical Bayesian framework, incorporating several…

Cosmology and Nongalactic Astrophysics · Physics 2009-10-21 Kaisey S. Mandel , W. Michael Wood-Vasey , Andrew S. Friedman , Robert P. Kirshner