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Roger C. Cappallo
Researcher at Massachusetts Institute of Technology
Publications - 14
Citations - 866
Roger C. Cappallo is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Murchison Widefield Array & Very-long-baseline interferometry. The author has an hindex of 8, co-authored 14 publications receiving 793 citations. Previous affiliations of Roger C. Cappallo include Max Planck Society.
Papers
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Journal ArticleDOI
DiFX2: A more flexible, efficient, robust and powerful software correlator
Adam T. Deller,Walter Brisken,Chris Phillips,John Morgan,Walter Alef,Roger C. Cappallo,Enno Middelberg,Jonathan D. Romney,Helge Rottmann,Steven Tingay,Randall B. Wayth +10 more
TL;DR: The evolution in the capabilities of the DiFX correlator over the past three years is described, including a number of new capabilities, substantial performance improvements, and a large amount of supporting infrastructure to ease use of the code.
Journal ArticleDOI
Overcoming real-world obstacles in 21 cm power spectrum estimation: A method demonstration and results from early Murchison Widefield Array data
Joshua S. Dillon,Adrian Liu,Christopher L. Williams,Jacqueline N. Hewitt,Max Tegmark,Edward H. Morgan,Alan M. Levine,Miguel F. Morales,Steven Tingay,Gianni Bernardi,Judd D. Bowman,Frank H. Briggs,Roger C. Cappallo,David Emrich,Daniel A. Mitchell,Divya Oberoi,Divya Oberoi,Thiagaraj Prabu,Randall B. Wayth,Rachel L. Webster +19 more
TL;DR: A robust power spectrum estimation framework that preserves the so-called EoR window and keeps track of estimator errors and covariances is developed.
Journal ArticleDOI
First spectroscopic imaging observations of the sun at low radio frequencies with the murchison widefield array prototype
Divya Oberoi,Lynn D. Matthews,Iver H. Cairns,David Emrich,Vasili Lobzin,Colin J. Lonsdale,Edward H. Morgan,T. Prabu,Harish Vedantham,Randall B. Wayth,Andrew Williams,Christopher L. Williams,Stephen M. White,Gabrielle Allen,W. Arcus,David G. Barnes,L. Benkevitch,Gianni Bernardi,Judd D. Bowman,Frank H. Briggs,John D. Bunton,S. Burns,Roger C. Cappallo,Michael A. Clark,Brian E. Corey,M. Dawson,David DeBoer,David DeBoer,A. De Gans,Ludi deSouza,Mark Derome,R. G. Edgar,T. Elton,Robert F. Goeke,M. R. Gopalakrishna,Lincoln J. Greenhill,Bryna J. Hazelton,David Herne,Jacqueline N. Hewitt,P. A. Kamini,David L. Kaplan,Justin C. Kasper,Rachel Kennedy,Rachel Kennedy,B. B. Kincaid,Jonathan Kocz,R. Koeing,Errol Kowald,Mervyn J. Lynch,S. Madhavi,Stephen R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Andrew Y. Ng,Stephen M. Ord,Joseph Pathikulangara,Alan E. E. Rogers,A. Roshi,A. Roshi,Joseph E. Salah,Robert J. Sault,Antony Schinckel,N. Udaya Shankar,K. S. Srivani,J. Stevens,Ravi Subrahmanyan,D. Thakkar,Steven Tingay,J. Tuthill,Annino Vaccarella,Mark Waterson,Mark Waterson,Rachel L. Webster,Alan R. Whitney +73 more
TL;DR: In this paper, the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27, were presented, covering the instantaneous frequency band 170.9- 201.6 MHz.
Journal ArticleDOI
Low-frequency Imaging of Fields at High Galactic Latitude with the Murchison Widefield Array 32 Element Prototype
Christopher L. Williams,Jacqueline N. Hewitt,Alan M. Levine,Angelica de Oliveira-Costa,Judd D. Bowman,Frank H. Briggs,Bryan Gaensler,Lars L. Hernquist,Daniel A. Mitchell,Miguel F. Morales,Shiv K. Sethi,Ravi Subrahmanyan,Elaine M. Sadler,W. Arcus,David G. Barnes,Gianni Bernardi,John D. Bunton,Roger C. Cappallo,Brian Crosse,Brian E. Corey,Avinash A. Deshpande,Ludi deSouza,Ludi deSouza,David Emrich,Robert F. Goeke,Lincoln J. Greenhill,Bryna J. Hazelton,David Herne,David L. Kaplan,Justin C. Kasper,B. B. Kincaid,R. Koenig,Eric Kratzenberg,Colin J. Lonsdale,Mervyn J. Lynch,S. Russell McWhirter,Edward H. Morgan,Divya Oberoi,Stephen M. Ord,Joseph Pathikulangara,Thiagaraj Prabu,Ronald A. Remillard,Alan E. E. Rogers,D. Anish Roshi,Joseph E. Salah,Robert J. Sault,N. Udaya Shankar,K. S. Srivani,Jamie Stevens,Jamie Stevens,Steven Tingay,Randall B. Wayth,Mark Waterson,Mark Waterson,Rachel L. Webster,Alan R. Whitney,Andrew Williams,J. Stuart B. Wyithe +57 more
TL;DR: The Murchison Widefield Array (MWA) is a new low-frequency, wide-field-of-view radio interferometer under development at the MWA-32T in Western Australia as discussed by the authors.
Journal ArticleDOI
First 230 GHz VLBI fringes on 3C 279 using the APEX Telescope
Jan Wagner,Alan L. Roy,Thomas P. Krichbaum,Walter Alef,A. Bansod,Alessandra Bertarini,Rolf Güsten,D. A. Graham,Jeffrey A. Hodgson,R. Märtens,Karl M. Menten,Dirk Muders,Helge Rottmann,Gino Tuccari,Achim Weiss,G. Wieching,M. Wunderlich,J. A. Zensus,J.P. Araneda,O. Arriagada,M. Cantzler,C. Duran,F. M. Montenegro-Montes,R. Olivares,P. Caro,Per Bergman,John Conway,Rüdiger Haas,Jan M. Johansson,Michael Lindqvist,Hans Olofsson,Miroslav Pantaleev,Salvatore Buttaccio,Roger C. Cappallo,Geoffrey B. Crew,Sheperd S. Doeleman,Vincent L. Fish,Ru-Sen Lu,Chet Ruszczyk,Jason SooHoo,Michael Titus,Robert Freund,Daniel P. Marrone,Peter A. Strittmatter,Lucy M. Ziurys,R. Blundell,Rurik A. Primiani,Jonathan Weintroub,Ken H. Young,Michael Bremer,S. Sánchez,Alan P. Marscher,R. Chilson,Keiichi Asada,Makoto Inoue +54 more
TL;DR: In this paper, a 230 GHz very long baseline interferometry (VLBI) fringe finder observation of blazar 3C 279 with the APEX telescope in Chile, the phased submillimeter array (SMA), and the SMT of the Arizona Radio Observatory (ARO).