THE 2014 ALMA LONG BASELINE CAMPAIGN: AN OVERVIEW
Journal article, 2015
A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions of tens of milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up to similar to 15 km. To develop and test this capability, a Long Baseline Campaign (LBC) was carried out from 2014 September to late November, culminating in end-to-end observations, calibrations, and imaging of selected Science Verification (SV) targets. This paper presents an overview of the campaign and its main results, including an investigation of the short-term coherence properties and systematic phase errors over the long baselines at the ALMA site, a summary of the SV targets and observations, and recommendations for science observing strategies at long baselines. Deep ALMA images of the quasar 3C 138 at 97 and 241 GHz are also compared to VLA 43 GHz results, demonstrating an agreement at a level of a few percent. As a result of the extensive program of LBC testing, the highly successful SV imaging at long baselines achieved angular resolutions as fine as 19 mas at similar to 350 GHz. Observing with ALMA on baselines of up to 15 km is now possible, and opens up new parameter space for submm astronomy.
techniques: interferometric
instrumentation: interferometers
phase
submillimeter: general
telescopes
Astronomy & Astrophysics
techniques: high angular resolution
calibration
Author
E. B. Fomalont
C. Vlahakis
S. Corder
A. Remijan
D. Barkats
R. Lucas
T. R. Hunter
C. L. Brogan
Y. Asaki
S. Matsushita
W. R. F. Dent
R. E. Hills
N. Phillips
A. M. S. Richards
P. Cox
R. Amestica
D. Broguiere
W. Cotton
A. S. Hales
R. Hiriart
A. Hirota
J. A. Hodge
C. M. V. Impellizzeri
J. Kern
R. Kneissl
E. Liuzzo
N. Marcelino
R. Marson
A. Mignano
K. Nakanishi
B. Nikolic
J. E. Perez
L. M. Perez
I. Toledo
Rebeca Aladro
Chalmers, Earth and Space Sciences, Extragalactic Astrophysics
B. Butler
J. Cortes
P. Cortes
V. Dhawan
J. Di Francesco
D. Espada
F. Galarza
D. Garcia-Appadoo
L. Guzman-Ramirez
E. M. Humphreys
T. Jung
S. Kameno
R. A. Laing
S. Leon
J. G. Mangum
G. Marconi
H. Nagai
Lars-Åke Nyman
M. Radiszcz
J. A. Rodon
T. Sawada
S. Takahashi
R. P. J. Tilanus
T. A. van Kempen
B. V. Vilaro
L. C. Watson
Tommy Wiklind
F. Gueth
K. Tatematsu
A. Wootten
A. Castro-Carrizo
E. Chapillon
G. Dumas
I. de Gregorio-Monsalvo
H. Francke
J. Gallardo
J. Garcia
S. Gonzalez
J. E. Hibbard
T. Hill
T. Kaminski
A. Karim
M. Krips
Y. Kurono
C. Lopez
S. Martin
L. Maud
F. Morales
V. Pietu
K. Plarre
G. Schieven
L. Testi
L. Videla
E. Villard
N. Whyborn
M. A. Zwaan
F. Alves
P. Andreani
A Avison
M. Barta
F. Bedosti
G. J. Bendo
F. Bertoldi
M. Bethermin
A. D. Biggs
J. Boissier
J. Brand
S. Burkutean
V. Casasola
John Conway
Chalmers, Earth and Space Sciences, Onsala Space Observatory
L. Cortese
B. Dabrowski
T. A. Davis
M. D. Trigo
F. Fontani
R. Franco-Hernandez
G. Fuller
R. G. Madrid
A. Giannetti
A. Ginsburg
S. F. Graves
E. Hatziminaoglou
M. Hogerheijde
P. Jachym
I. J. Serra
M. Karlicky
P. Klaasen
M. Kraus
D. Kunneriath
C. Lagos
S. Longmore
S. Leurini
Matthias Maercker
Chalmers, Earth and Space Sciences, Onsala Space Observatory
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
B. Magnelli
Ivan Marti-Vidal
Chalmers, Earth and Space Sciences, Onsala Space Observatory
M. Massardi
A. Maury
S. Muehle
S. Muller
T. Muxlow
Eamon O Gorman
Astronomy and Plasmaphysics
R. Paladino
D. Petry
J. Pineda
S. Randall
J. S. Richer
A. Rossetti
A. Rushton
K. Rygl
A. S. Monge
R. Schaaf
P. Schilke
T. Stanke
M. Schmalzl
F. Stoehr
S. Urban
E. van Kampen
Wouter Vlemmings
Chalmers, Earth and Space Sciences, Onsala Space Observatory
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
K. Wang
W. Wild
Y. Yang
S. Iguchi
T. Hasegawa
M. Saito
J. Inatani
N. Mizuno
S. Asayama
G. Kosugi
K. I. Morita
K. Chiba
S. Kawashima
S. K. Okumura
N. Ohashi
R. Ogasawara
S. Sakamoto
T. Noguchi
Y. D. Huang
S. Y. Liu
F. Kemper
P. M. Koch
M. T. Chen
Y. Chikada
M. Hiramatsu
D. Iono
M. Shimojo
S. Komugi
J. Kim
A. R. Lyo
E. Muller
C. Herrera
R. E. Miura
J. Ueda
J. Chibueze
Y. N. Su
A. Trejo-Cruz
K. S. Wang
H. Kiuchi
N. Ukita
M. Sugimoto
R. Kawabe
Mariko Hayashi
S. Miyama
P. T. P. Ho
N. Kaifu
M. Ishiguro
A. J. Beasley
S. Bhatnagar
J. A. Braatz
D. G. Brisbin
N. Brunetti
C. Carilli
J. H. Crossley
L. D'Addario
J. L. D. Meyer
D. T. Emerson
A. S. Evans
P. Fisher
K. Golap
D. M. Griffith
A. E. Hale
D. Halstead
E. J. Hardy
M. C. Hatz
M. Holdaway
R. Indebetouw
P. R. Jewell
A. A. Kepley
D. C. Kim
M. D. Lacy
A. K. Leroy
H. S. Liszt
C. J. Lonsdale
B. Matthews
M. McKinnon
B. S. Mason
G. Moellenbrock
A. Moullet
S. T. Myers
J. Ott
A. B. Peck
J. Pisano
S. J. E. Radford
W. T. Randolph
U. R. Venkata
M. G. Rawlings
R. Rosen
S. L. Schnee
K. S. Scott
N. K. Sharp
K. Sheth
R. S. Simon
T. Tsutsumi
S. J. Wood
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 808 1 L1Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
Infrastructure
Onsala Space Observatory
DOI
10.1088/2041-8205/808/1/l1