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The Sloan Digital Sky Survey-II Supernova Survey: Technical Summary

The Sloan Digital Sky Survey-II (SDSS-II) has embarked on a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using repeated five-band (ugriz) imaging over an…

Astrophysics · Physics 2008-11-26 Joshua A. Frieman , B. Bassett , A. Becker , C. Choi , D. Cinabro , F. DeJongh , D. L. Depoy , B. Dilday , M. Doi , P. M. Garnavich , C. J. Hogan , J. Holtzman , M. Im , S. Jha , R. Kessler , K. Konishi , H. Lampeitl , J. Marriner , J. L. Marshall , D. McGinnis , G. Miknaitis , R. C. Nichol , J. L. Prieto , A. G. Riess , M. W. Richmond , R. Romani , M. Sako , D. P. Schneider , M. Smith , N. Takanashi , K. Tokita , K. van der Heyden , N. Yasuda , C. Zheng , J. Adelman-McCarthy , J. Annis , R. J. Assef , J. Barentine , R. Bender , R. D. Blandford , W. N. Boroski , M. Bremer , H. Brewington , C. A. Collins , A. Crotts , J. Dembicky , J. Eastman , A. Edge , E. Edmondson , E. Elson , M. E. Eyler , A. V. Filippenko , R. J. Foley , S. Frank , A. Goobar , T. Gueth , J. E. Gunn , M. Harvanek , U. Hopp , Y. Ihara , Ž. Ivezić , S. Kahn , J. Kaplan , S. Kent , W. Ketzeback , S. J. Kleinman , W. Kollatschny , R. G. Kron , J. Krzesiński , D. Lamenti , G. Leloudas , H. Lin , D. C. Long , J. Lucey , R. H. Lupton , E. Malanushenko , V. Malanushenko , R. J. McMillan , J. Mendez , C. W. Morgan , T. Morokuma , A. Nitta , L. Ostman , K. Pan , C. M. Rockosi , A. K. Romer , P. Ruiz-Lapuente , G. Saurage , K. Schlesinger , S. A. Snedden , J. Sollerman , C. Stoughton , M. Stritzinger , M. SubbaRao , D. Tucker , P. Vaisanen , L. C. Watson , S. Watters , J. C. Wheeler , B. Yanny , D. York

Improving Cosmological Distance Measurements Using Twin Type Ia Supernovae

We introduce a method for identifying "twin" Type Ia supernovae, and using them to improve distance measurements. This novel approach to Type Ia supernova standardization is made possible by spectrophotometric time series observations from…

Cosmology and Nongalactic Astrophysics · Physics 2015-12-16 H. K. Fakhouri , K. Boone , G. Aldering , P. Antilogus , C. Aragon , S. Bailey , C. Baltay , K. Barbary , D. Baugh , S. Bongard , C. Buton , J. Chen , M. Childress , N. Chotard , Y. Copin , P. Fagrelius , U. Feindt , M. Fleury , D. Fouchez , E. Gangler , B. Hayden , A. G. Kim , M. Kowalski , P. -F. Leget , S. Lombardo , J. Nordin , R. Pain , E. Pecontal , R. Pereira , S. Perlmutter , D. Rabinowitz , J. Ren , M. Rigault , D. Rubin , K. Runge , C. Saunders , R. Scalzo , G. Smadja , C. Sofiatti , M. Strovink , N. Suzuki , C. Tao , R. C. Thomas , B. A. Weaver

JWST Spectroscopy of SN H0pe: Classification and Time Delays of a Triply-imaged Type Ia Supernova at z = 1.78

SN H0pe is a triply imaged supernova (SN) at redshift $z=1.78$ discovered using the James Webb Space Telescope (JWST). In order to classify the SN spectroscopically and measure the relative time delays of its three images (designated A, B,…

Astrophysics of Galaxies · Physics 2024-03-29 Wenlei Chen , Patrick L. Kelly , Brenda L. Frye , Justin Pierel , S. P. Willner , Massimo Pascale , Seth H. Cohen , Christopher J. Conselice , Michael Engesser , Lukas J. Furtak , Daniel Gilman , Norman A. Grogin , Simon Huber , Saurabh W. Jha , Joel Johansson , Anton M. Koekemoer , Conor Larison , Ashish K. Meena , Matthew R. Siebert , Rogier A. Windhorst , Haojing Yan , Adi Zitrin

Over-Luminous Type Ia Supernovae and Standard Candle Cosmology

Type Ia supernovae (SNe\,Ia) serve as crucial cosmological distance indicators because of their empirical consistency in peak luminosity and characteristic light curve decline rates. These properties facilitate them to be standardized…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-25 Abhinandan Ravi , T. R. Govindarajan , Surajit Kalita

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 Fall 2004 SDSS Supernova Survey

In preparation for the Supernova Survey of the Sloan Digital Sky Survey (SDSS) II, a proposed 3-year extension to the SDSS, we have conducted an early engineering and science run during the fall of 2004, which consisted of approximately 20…

Astrophysics · Physics 2008-11-26 Masao Sako , Roger Romani , Josh Frieman , Jen Adelman-McCarthy , Andrew Becker , Fritz DeJongh , Ben Dilday , Juan Estrada , John Hendry , Jon Holtzman , Jared Kaplan , Rick Kessler , Hubert Lampeitl , John Marriner , Gajus Miknaitis , Adam Riess , Douglas Tucker , J. Barentine , R. Blandford , H. Brewington , J. Dembicky , M. Harvanek , S. Hawley , C. Hogan , D. Johnston , S. Kahn , B. Ketzeback , S. Kleinman , J. Krzesinski , D. Lamenti , D. Long , R. McMillan , P. Newman , A. Nitta , R. Nichol , R. Scranton , E. Sheldon , S. Snedden , C. Stoughton , D. York , the SDSS Collaboration

A Late-time Radio Survey of Type Ia-CSM Supernovae with the Very Large Array

Type Ia-CSM supernovae (SNe) are a rare and peculiar subclass of thermonuclear SNe characterized by emission lines of hydrogen or helium, indicative of a high-density circumstellar medium (CSM). Their implied mass-loss rates of $\sim…

High Energy Astrophysical Phenomena · Physics 2025-11-04 Olivia Griffith , Grace Showerman , Sumit K. Sarbadhicary , Chelsea E. Harris , Laura Chomiuk , Jesper Sollerman , Peter Lundqvist , Javier Moldon , Miguel Perez-Torres , Erik C. Kool , Takashi J. Moriya

The Carnegie Supernova Project: Analysis of the First Sample of Low-Redshift Type-Ia Supernovae

We present the analysis of the first set of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project. Well-sampled, high-precision optical (ugriBV) and near-infrared (NIR; YJHKs) light curves obtained in a well-understood…

Cosmology and Nongalactic Astrophysics · Physics 2011-04-07 Gaston Folatelli , M. M. Phillips , Christopher R. Burns , Carlos Contreras , Mario Hamuy , W. L. Freedman , S. E. Persson , Maximilian Stritzinger , Nicholas B. Suntzeff , Kevin Krisciunas , Luis Boldt , Sergio Gonzalez , Wojtek Krzeminski , Nidia Morrell , Miguel Roth , Francisco Salgado , Barry F. Madore , David Murphy , Pamela Wyatt , Weidong Li , Alexei V. Filippenko , Nicole Miller

Supernova rates from the SUDARE VST-Omegacam search. I

We describe the observing strategy, data reduction tools and early results of a supernova (SN) search project, named SUDARE, conducted with the ESO VST telescope aimed at measuring the rate of the different types of SNe in the redshift…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-18 E. Cappellaro , M. T. Botticella , G. Pignata , L. Grado , L. Greggio , L. Limatola , M. Vaccari , A. Baruffolo , S. Benetti , F. Bufano , M. Capaccioli , E. Cascone , G. Covone , D. De Cicco , S. Falocco , M. Della Valle , M. Jarvis , L. Marchetti , N. R. Napolitano , M. Paolillo , A. Pastorello , M. Radovich , P. Schipani , S. Spiro , L. Tomasella , M. Turatto

Towards a Cosmological Hubble Diagram for Type II-P Supernovae

We present the first high-redshift Hubble diagram for Type II-P supernovae (SNe II-P) based upon five events at redshift up to z~0.3. This diagram was constructed using photometry from the Canada-France-Hawaii Telescope Supernova Legacy…

Astrophysics · Physics 2009-11-11 Peter Nugent , Mark Sullivan , Richard Ellis , Avishay Gal-Yam , Douglas C. Leonard , D. Andrew Howell , Pierre Astier , Raymond G. Carlberg , Alex Conley , Sebastien Fabbro , Dominique Fouchez , James D. Neill , Reynald Pain , Kathy Perrett , Chris J. Pritchet , Nicolas Regnault

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

Optical and Infrared Photometry of the Type Ia Supernovae 1991T, 1991bg, 1999ek, 2001bt, 2001cn, 2001cz, and 2002bo

We present optical and/or infrared photometry of the Type Ia supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline rate parameters Delta m_15(B) close to the…

Astrophysics · Physics 2009-11-10 Kevin Krisciunas , Nicholas B. Suntzeff , Mark M. Phillips , Pablo Candia , Jose Luis Prieto , R. Antezana , R. Chassagne , H. -W. Chen , M. Dickinson , P. R. Eisenhardt , J. Espinoza , P. M. Garnavich , D. Gonzalez , T. E. Harrison , M. Hamuy , V. D. Ivanov , W. Krzeminski , C. Kulesa , P. McCarthy , A. Moro-Martin , C. Muena , A. Noriega-Crespo , S. E. Persson , P. A. Pinto , M. Roth , E. P. Rubenstein , S. A. Stanford , G. S. Stringfellow , A. Zapata , Alain Porter , Marina Wischnjewsky

Evidence for Type Ia Supernova Diversity from Ultraviolet Observations with the Hubble Space Telescope

We present ultraviolet (UV) spectroscopy and photometry of four Type Ia supernovae (SNe 2004dt, 2004ef, 2005M, and 2005cf) obtained with the UV prism of the Advanced Camera for Surveys on the Hubble Space Telescope. This dataset provides…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Xiaofeng Wang , Lifan Wang , Alexei V. Filippenko , Eddie Baron , Markus Kromer , Dennis Jack , Tianmeng Zhang , Greg Aldering , Pierre Antilogus , David Arnett , Dietrich Baade , Brian J. Barris , Stefano Benetti , Patrice Bouchet , Adam S. Burrows , Ramon Canal , Enrico Cappellaro , Raymond Carlberg , Elisa di Carlo , Peter Challis , Arlin Crotts , John I. Danziger , Massimo Della Valle , Michael Fink , Ryan J. Foley , Claes Fransson , Avishay Gal-Yam , Peter Garnavich , Chris L. Gerardy , Gerson Goldhaber , Mario Hamuy , Wolfgang Hillebrandt , Peter A. Hoeflich , Stephen T. Holland , Daniel E. Holz , John P. Hughes , David J. Jeffery , Saurabh W. Jha , Dan Kasen , Alexei M. Khokhlov , Robert P. Kirshner , Robert Knop , Cecilia Kozma , Kevin Krisciunas , Brian C. Lee , Bruno Leibundgut , Eric J. Lentz , Douglas C. Leonard , Walter H. G. Lewin , Weidong Li , Mario Livio , Peter Lundqvist , Dan Maoz , Thomas Matheson , Paolo Mazzali , Peter Meikle , Gajus Miknaitis , Peter Milne , Stefan Mochnacki , Ken'Ichi Nomoto , Peter E. Nugent , Elaine Oran , Nino Panagia , Saul Perlmutter , Mark M. Phillips , Philip Pinto , Dovi Poznanski , Christopher J. Pritchet , Martin Reinecke , Adam Riess , Pilar Ruiz-Lapuente , Richard Scalzo , Eric M. Schlegel , Brian Schmidt , James Siegrist , Alicia M. Soderberg , Jesper Sollerman , George Sonneborn , Anthony Spadafora , Jason Spyromilio , Richard A. Sramek , Sumner G. Starrfield , Louis G. Strolger , Nicholas B. Suntzeff , Rollin Thomas , John L. Tonry , Amedeo Tornambe , James W. Truran , Massimo Turatto , Michael Turner , Schuyler D. Van Dyk , Kurt Weiler , J. Craig Wheeler , Michael Wood-Vasey , Stan Woosley , Hitoshi Yamaoka

Cepheid Calibrations from the Hubble Space Telescope of the Luminosity of Two Recent Type Ia Supernovae and a Re-determination of the Hubble Constant

We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC 3370 and SN 1998aq in NGC 3982. For NCG…

Astrophysics · Physics 2009-11-10 Adam G. Riess , Weidong Li , Peter B. Stetson , Alexei V. Filippenko , Saurabh Jha , Robert P. Kirshner , Peter M. Challis , Peter M. Garnavich , Ryan Chornock

Carnegie Supernova Project-II: A new method to photometrically identify sub-types of extreme Type Ia Supernovae

We present a new method to photometrically delineate between various sub-types of type Ia supernovae (SNe Ia). Using the color-stretch parameters, $s_{BV}$ or $s_{gr}$, and the time of i-band primary maximum relative to the B-band or g-band…

High Energy Astrophysical Phenomena · Physics 2020-05-27 C. Ashall , J. Lu , C. Burns , E. Y. Hsiao , M. Stritzinger , N. B. Suntzeff , M. M. Phillips , E. Baron , C. Contreras , S. Davis , L. Galbany , P. Hoeflich , S. Holmbo , N. Morrell , E. Karamehmetoglu , K. Krisciunas , S. Kumar , M. Shahbandeh , S. Uddin

LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations

Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently-discovered strongly…

High Energy Astrophysical Phenomena · Physics 2025-03-12 Conor Larison , Justin D. R. Pierel , Max J. B. Newman , Saurabh W. Jha , Daniel Gilman , Erin E. Hayes , Aadya Agrawal , Nikki Arendse , Simon Birrer , Mateusz Bronikowski , John M. Della Costa , David A. Coulter , Frédéric Courbin , Sukanya Chakrabarti , Jose M. Diego , Kyle A. Dalrymple , Suhail Dhawan , Ariel Goobar , Christa Gall , Jens Hjorth , Xiaosheng Huang , Shude Mao , Rui Marques-Chaves , Paolo A. Mazzali , Anupreeta More , Leonidas A. Moustakas , Ismael Pérez-Fournon , Tanja Petrushevska , Frédérick Poidevin , Armin Rest , Anowar J. Shajib , Raphael Shirley , William Sheu , Louis-Gregory Strolger , Sherry H. Suyu , Tommaso Treu , Yossef Zenati

The DEHVILS in the Details: Type Ia Supernova Hubble Residual Comparisons and Mass Step Analysis in the Near-Infrared

Measurements of Type Ia Supernovae (SNe Ia) in the near-infrared (NIR) have been used both as an alternate path to cosmology compared to optical measurements and as a method of constraining key systematics for the larger optical studies.…

Cosmology and Nongalactic Astrophysics · Physics 2024-10-02 Erik R. Peterson , Daniel Scolnic , David O. Jones , Aaron Do , Brodie Popovic , Adam G. Riess , Arianna Dwomoh , Joel Johansson , David Rubin , Bruno O. Sánchez , Benjamin J. Shappee , John L. Tonry , R. Brent Tully , Maria Vincenzi

Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae

We present spectra of high-redshift supernovae (SNe) that were taken with the Subaru low resolution optical spectrograph, FOCAS. These SNe were found in SN surveys with Suprime-Cam on Subaru, the CFH12k camera on the Canada-France-Hawaii…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Tomoki Morokuma , Kouichi Tokita , Christopher Lidman , Mamoru Doi , Naoki Yasuda , Greg Aldering , Rahman Amanullah , Kyle Barbary , Kyle Dawson , Vitaliy Fadeyev , Hannah K. Fakhouri , Gerson Goldhaber , Ariel Goobar , Takashi Hattori , Junji Hayano , Isobel M. Hook , D. Andrew Howell , Hisanori Furusawa , Yutaka Ihara , Nobunari Kashikawa , Rob A. Knop , Kohki Konishi , Joshua Meyers , Takeshi Oda , Reynald Pain , Saul Perlmutter , David Rubin , Anthony L. Spadafora , Nao Suzuki , Naohiro Takanashi , Tomonori Totani , Hiroyuki Utsunomiya , Lifan Wang

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts. From the spectra alone, 20 candidates are…

Astrophysics · Physics 2009-11-10 C. Lidman , D. A. Howell , G. Folatelli , G. Garavini , S. Nobili , G. Aldering , R. Amanullah , P. Antilogus , P. Astier , G. Blanc , M. S. Burns , A. Conley , S. E. Deustua , M. Doi , R. Ellis , S. Fabbro , V. Fadeyev , R. Gibbons , G. Goldhaber , A. Goobar , D. E. Groom , I. Hook , N. Kashikawa , A. G. Kim , R. A. Knop , B. C. Lee , J. Mendez , T. Morokuma , K. Motohara , P. E. Nugent , R. Pain , S. Perlmutter , V. Prasad , R. Quimby , J. Raux , N. Regnault , P. Ruiz-Lapuente , G. Sainton , B. E. Schaefer , K. Schahmaneche , E. Smith , A. L. Spadafora , V. Stanishev , N. A. Walton , L. Wang , W. M. Wood-Vasey , N. Yasuda

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

We present observations of 10 type Ia supernovae (SNe Ia) between 0.16 < z < 0.62. With previous data from our High-Z Supernova Search Team, this expanded set of 16 high-redshift supernovae and 34 nearby supernovae are used to place…

Astrophysics · Physics 2008-11-26 Adam G. Riess , Alexei V. Filippenko , Peter Challis , Alejandro Clocchiattia , Alan Diercks , Peter M. Garnavich , Ron L. Gilliland , Craig J. Hogan , Saurabh Jha , Robert P. Kirshner , B. Leibundgut , M. M. Phillips , David Reiss , Brian P. Schmidt , Robert A. Schommer , R. Chris Smith , J. Spyromilio , Christopher Stubbs , Nicholas B. Suntzeff , John Tonry