Related papers: The Dark Energy Bedrock All-Sky Supernova Program:…

Implications of Two Type Ia Supernova Populations for Cosmological Measurements

Recent work suggests that Type Ia supernovae (SNe) are composed of two distinct populations: prompt and delayed. By explicitly incorporating properties of host galaxies, it may be possible to target and eliminate systematic differences…

Astrophysics · Physics 2010-11-11 Devdeep Sarkar , Alexandre Amblard , Asantha Cooray , Daniel E. Holz

Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey

We combine high redshift Type Ia supernovae from the first 3 years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality joint sample of 472 SNe (123 low-$z$, 93 SDSS,…

Cosmology and Nongalactic Astrophysics · Physics 2011-04-11 A. Conley , J. Guy , M. Sullivan , 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 , M. J. Hudson , E. Hsiao , T. Kronborg , C. Lidman , A. M. Mourao , J. D. Neill , S. Perlmutter , P. Ripoche , N. Suzuki , E. S. Walker

Studying the Ultraviolet Spectrum of the First Spectroscopically Confirmed Supernova at redshift two

We present observations of DES16C2nm, the first spectroscopically confirmed hydrogen-free superluminous supernova (SLSN-I) at redshift z~2. DES16C2nm was discovered by the Dark Energy Survey (DES) Supernova Program, with follow-up…

High Energy Astrophysical Phenomena · Physics 2018-02-21 M. Smith , M. Sullivan , R. C. Nichol , L. Galbany , C. B. D'Andrea , C. Inserra , C. Lidman , A. Rest , M. Schirmer , A. V. Filippenko , W. Zheng , S. Bradley Cenko , C. R. Angus , P. J. Brown , T. M. Davis , D. A. Finley , S. Gonzalez-Gaitan , C. P. Gutierrez , R. Kessler , S. Kuhlmann , J. Marriner , A. Moller , P. E. Nugent , S. Prajs , R. Thomas , R. Wolf , A. Zenteno , T. M. C. Abbott , F. B. Abdalla , S. Allam , J. Annis , K. Bechtol , A. Benoit-Levy , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , M. Crocce , C. E. Cunha , L. N. da Costa , C. Davis , 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. A. Goldstein , D. Gruen , R. A. Gruendl , J. Gschwend , G. Gutierrez , K. Honscheid , D. J. James , M. W. G. Johnson , K. Kuehn , N. Kuropatkin , T. S. Li , M. Lima , M. A. G. Maia , J. L. Marshall , P. Martini , F. Menanteau , C. J. Miller , R. Miguel , R. L. C. Ogando , D. Petravick , A. A. Plazas , A. K. Romer , E. S. Rykoff , M. Sako , E. Sanchez , V. Scarpine , R. Schindler , M. Schubnell , I. Sevilla-Noarbe , R. C. Smith , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , A. R. Walker

The Rate of Type Ia Supernovae at z~0.2 from SDSS-I Overlapping Fields

In the course of the Sloan Digital Sky Survey (SDSS-I), a large fraction of the surveyed area was observed more than once due to field tiling overlap, usually at different epochs. We utilize some of these data to perform a supernova (SN)…

Astrophysics · Physics 2009-11-13 Assaf Horesh , Dovi Poznanski , Eran O. Ofek , Dan Maoz

ZTF SN Ia DR2 follow-up: Characterization of subluminous Type Ia supernovae in the ZTF DR2 full sample

The Zwicky Transient Facility Data Release 2 (ZTF DR2) includes a total of 3,628 Type Ia supernovae (SNe~Ia), providing the largest and most complete sample of spectroscopically confirmed SNe~Ia at low redshift to date. In this paper, we…

High Energy Astrophysical Phenomena · Physics 2025-12-25 Alaa Alburai , Lluís Galbany , Umut Burgaz , Georgios Dimitriadis , Joel Johansson , Mat Smith , Ramon Sanfeliu , Sandra Guerra , Tomás Müller-Bravo , Ariel Goobar , Suhail Dhawan , Young-Lo Kim , Jakob Nordin , Alice Townsend , Jesper Sollerman , Madeleine Ginolin , Mickael Rigault , Jacco H. Terwel , Roger Smith , Avery Wold , Tracy X. Chen , Theophile Jegou du Laz

Extending the supernova Hubble diagram to z~1.5 with the Euclid space mission

We forecast dark energy constraints that could be obtained from a new large sample of Type Ia supernovae where those at high redshift are acquired with the Euclid space mission. We simulate a three-prong SN survey: a z<0.35 nearby sample…

Cosmology and Nongalactic Astrophysics · Physics 2014-12-03 P. Astier , C. Balland , M. Brescia , E. Cappellaro , R. G. Carlberg , S. Cavuoti , M. Della Valle , E. Gangler , A. Goobar , J. Guy , D. Hardin , I. M. Hook , R. Kessler , A. Kim , E. Linder , G. Longo , K. Maguire , F. Mannucci , S. Mattila , R. Nichol , R. Pain , N. Regnault , S. Spiro , M. Sullivan , C. Tao , M. Turatto , X. F. Wang , W. M. Wood-Vasey

SDSS-II Supernova Survey: An Analysis of the Largest Sample of Type Ia Supernovae and Correlations with Host-Galaxy Spectral Properties

Using the largest single-survey sample of Type Ia supernovae (SNe Ia) to date, we study the relationship between properties of SNe Ia and those of their host galaxies, focusing primarily on correlations with Hubble residuals (HR). Our…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-27 Rachel C. Wolf , Chris B. D'Andrea , Ravi R. Gupta , Masao Sako , John A. Fischer , Rick Kessler , Saurabh W. Jha , Marisa C. March , Daniel M. Scolnic , Johanna-Laina Fischer , Heather Campbell , Robert C. Nichol , Matthew D. Olmstead , Michael Richmond , Donald P. Schneider , Mathew Smith

Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra are used to determine the redshift and…

Astrophysics · Physics 2008-11-26 I. M. Hook , D. A. Howell , G. Aldering , R. Amanullah , M. S. Burns , A. Conley , S. E. Deustua , R. Ellis , S. Fabbro , V. Fadeyev , G. Folatelli , G. Garavini , R. Gibbons , G. Goldhaber , A. Goobar , D. E. Groom , A. G. Kim , R. A. Knop , M. Kowalski , C. Lidman , S. Nobili , P. E. Nugent , R. Pain , C. R. Pennypacker , S. Perlmutter , P. Ruiz-Lapuente , G. Sainton , B. E. Schaefer , E. Smith , A. L. Spadafora , V. Stanishev , R. C. Thomas , N. A. Walton , L. Wang , W. M. Wood-Vasey

The Pantheon+ Analysis: The Full Dataset and Light-Curve Release

Here we present 1701 light curves of 1550 spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological parameters as part of the Pantheon+ SN analysis and the SH0ES (Supernovae and H0 for the Equation of…

Cosmology and Nongalactic Astrophysics · Physics 2022-10-26 Dan Scolnic , Dillon Brout , Anthony Carr , Adam G. Riess , Tamara M. Davis , Arianna Dwomoh , David O. Jones , Noor Ali , Pranav Charvu , Rebecca Chen , Erik R. Peterson , Brodie Popovic , Benjamin M. Rose , Charlotte Wood , Peter J. Brown , Ken Chambers , David A. Coulter , Kyle G. Dettman , Georgios Dimitriadis , Alexei V. Filippenko , Ryan J. Foley , Saurabh W. Jha , Charles D. Kilpatrick , Robert P. Kirshner , Yen-Chen Pan , Armin Rest , Cesar Rojas-Bravo , Matthew R. Siebert , Benjamin E. Stahl , WeiKang Zheng

SCONE: Supernova Classification with a Convolutional Neural Network

We present a novel method of classifying Type Ia supernovae using convolutional neural networks, a neural network framework typically used for image recognition. Our model is trained on photometric information only, eliminating the need for…

Instrumentation and Methods for Astrophysics · Physics 2021-11-10 Helen Qu , Masao Sako , Anais Möller , Cyrille Doux

Supernova Rates and Luminosity Functions from ASAS-SN I: 2014--2017 Type Ia SNe and Their Subtypes

We present the volumetric rates and luminosity functions (LFs) of Type Ia supernovae (SNe Ia) from the $V$-band All-Sky Automated Survey for Supernovae (ASAS-SN) catalogues spanning discovery dates from UTC 2014-01-26 to UTC 2017-12-29. Our…

High Energy Astrophysical Phenomena · Physics 2024-05-27 D. D. Desai , C. S. Kochanek , B. J. Shappee , T. Jayasinghe , K. Z. Stanek , T. W. -S. Holoien , T. A. Thompson , C. Ashall , J. F. Beacom , A. Do , S. Dong , J. L. Prieto

Constraining Cosmic Evolution of Type Ia Supernovae

We present the first large-scale effort of creating composite spectra of high-redshift type Ia supernovae (SNe Ia) and comparing them to low-redshift counterparts. Through the ESSENCE project, we have obtained 107 spectra of 88…

Astrophysics · Physics 2014-11-18 Ryan J. Foley , A. V. Filippenko , C. Aguilera , A. C. Becker , S. Blondin , P. Challis , A. Clocchiatti , R. Covarrubias , T. M. Davis , P. M. Garnavich , S. Jha , R. P. Kirshner , K. Krisciunas , B. Leibundgut , W. Li , T. Matheson , A. Miceli , G. Miknaitis , G. Pignata , A. Rest , A. G. Riess , B. P. Schmidt , R. C. Smith , J. Sollerman , J. Spyromilio , C. W. Stubbs , J. L. Tonry , N. B. Suntzeff , W. M. Wood-Vasey , A. Zenteno

Understanding Type Ia Supernova Distance Biases by Simulating Spectral Variations

In the next decade, transient searches from the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope will increase the sample of known Type Ia Supernovae (SN Ia) from $\sim10^3$ to $10^5$. With this reduction of statistical…

Cosmology and Nongalactic Astrophysics · Physics 2021-04-28 J. D. R. Pierel , D. O. Jones , M. Dai , D. Q. Adams , R. Kessler , S. Rodney , M. R. Siebert , R. J. Foley , W. D. Kenworthy , D. Scolnic

The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg$^2$ of the sky

We present cosmological constraints from the Dark Energy Camera All Data Everywhere (DECADE) cosmic shear analysis. This work uses shape measurements for 107 million galaxies measured through Dark Energy Camera (DECam) imaging of $5,\!412$…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-24 D. Anbajagane , C. Chang , A. Drlica-Wagner , C. Y. Tan , M. Adamow , R. A. Gruendl , L. F. Secco , Z. Zhang , M. R. Becker , P. S. Ferguson , N. Chicoine , K. Herron , A. Alarcon , R. Teixeira , D. Suson , A. N. Alsina , A. Amon , F. Andrade-Oliveira , J. Blazek , C. R. Bom , H. Camacho , J. A. Carballo-Bello , A. Carnero Rosell , R. Cawthon , W. Cerny , A. Choi , Y. Choi , S. Dodelson , C. Doux , K. Eckert , J. Elvin-Poole , J. Esteves , M. Gatti , G. Giannini , D. Gruen , W. G. Hartley , K. Herner , E. M. Huff , D. J. James , M. Jarvis , E. Krause , N. Kuropatkin , C. E. Martínez-Vázquez , P. Massana , S. Mau , J. McCullough , G. E. Medina , B. Mutlu-Pakdil , J. Myles , M. Navabi , N. E. D. Noël , A. B. Pace , A. Porredon , J. Prat , M. Raveri , A. H. Riley , E. S. Rykoff , J. D. Sakowska , S. Samuroff , D. Sanchez-Cid , D. J. Sand , L. Santana-Silva , I. Sevilla-Noarbe , T. Shin , M. Soares-Santos , G. S. Stringfellow , C. To , A. Tong , M. A. Troxel , A. K. Vivas , M. Yamamoto , B. Yanny , B. Yin , Y. Zhang , J. Zuntz

Using Host Galaxy Photometric Redshifts to Improve Cosmological Constraints with Type Ia Supernova in the LSST Era

We perform a rigorous cosmology analysis on simulated type Ia supernovae (SN~Ia) and evaluate the improvement from including photometric host-galaxy redshifts compared to using only the "zspec" subset with spectroscopic redshifts from the…

Cosmology and Nongalactic Astrophysics · Physics 2023-03-08 Ayan Mitra , Richard Kessler , Surhud More , Renee Hlozek , The LSST Dark Energy Science Collaboration

OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release

We present results for the first three years of OzDES, a six-year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the Anglo-Australian…

Cosmology and Nongalactic Astrophysics · Physics 2017-08-16 M. J. Childress , C. Lidman , T. M. Davis , B. E. Tucker , J. Asorey , F. Yuan , T. M. C. Abbott , F. B. Abdalla , S. Allam , J. Annis , M. Banerji , A. Benoit-Levy , S. R. Bernard , E. Bertin , D. Brooks , E. Buckley-Geer , D. L. Burke , A. Carnero Rosell , D. Carollo , M. Carrasco Kind , J. Carretero , F. J. Castander , C. E. Cunha , L. N. da Costa , C. B. D'Andrea , P. Doel , T. F. Eifler , A. E. Evrard , B. Flaugher , R. J. Foley , P. Fosalba , J. Frieman , J. Garcia-Bellido , K. Glazebrook , D. A. Goldstein , D. Gruen , R. A. Gruendl , J. Gschwend , R. R. Gupta , G. Gutierrez , S. R. Hinton , J. K. Hoormann , D. J. James , R. Kessler , A. G. Kim , A. L. King , E. Kovacs , K. Kuehn , S. Kuhlmann , N. Kuropatkin , D. J. Lagattuta , G. F. Lewis , T. S. Li , M. Lima , H. Lin , E. Macaulay , M. A. G. Maia , J. Marriner , M. March , J. L. Marshall , P. Martini , R. G. McMahon , F. Menanteau , R. Miquel , A. Moller , E. Morganson , J. Mould , D. Mudd , D. Muthukrishna , R. C. Nichol , B. Nord , R. L. C. Ogando , F. Ostrovski , D. Parkinson , A. A. Plazas , S. L. Reed , K. Reil , A. K. Romer , E. S. Rykoff , M. Sako , E. Sanchez , V. Scarpine , R. Schindler , M. Schubnell , D. Scolnic , I. Sevilla-Noarbe , N. Seymour , R. Sharp , M. Smith , M. Soares-Santos , F. Sobreira , N. E. Sommer , H. Spinka , E. Suchyta , M. Sullivan , M. E. C. Swanson , G. Tarle , S. A. Uddin , A. R. Walker , W. Wester , B. R. Zhang

Reddening, Absorption, and Decline Rate Corrections for a Complete Sample of Type Ia Supernovae leading to a Fully Corrected Hubble Diagram to v<30,000kms-1

Photometric BVI and redshift data corrected for streaming motions are compiled for 111 "Branch normal", 4 1991T-like, 7 1991bg-like, and 2 unusual SNe Ia. Color excesses E(B-V)host of normal SNe Ia, due to the absorption of the host galaxy,…

Astrophysics · Physics 2009-11-10 B. Reindl , G. A. Tammann , A. Sandage , A. Saha

Prospects of Searching for Type Ia Supernovae with 2.5-m Wide Field Survey Telescope

Type Ia Supernovae (SNe Ia) are the thermonuclear explosion of a carbon-oxygen white dwarf (WD) and are well-known as a distance indicator. However, it is still unclear how WDs increase their mass near the Chandrasekhar limit and how the…

Solar and Stellar Astrophysics · Physics 2022-12-27 Maokai Hu , Lei Hu , Ji-an Jiang , Lin Xiao , Lulu Fan , Junjie Wei , Xuefeng Wu

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

New Early Dark Energy is compatible with current LSS data

Recently a full-shape analysis of large-scale structure (LSS) data was employed to provide new constraints on a class of Early Dark Energy (EDE) models. In this note, we derive similar constraints on New Early Dark Energy (NEDE) using the…

Cosmology and Nongalactic Astrophysics · Physics 2021-06-02 Florian Niedermann , Martin S. Sloth