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: high angular resolution

calibration

submillimeter: general

phase

telescopes

Astronomy & Astrophysics

instrumentation: interferometers

techniques: interferometric

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

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

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, Radio Astronomy and Astrophysics

Chalmers, Earth and Space Sciences, Onsala Space Observatory

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

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, Radio Astronomy and Astrophysics

Chalmers, Earth and Space Sciences, Onsala Space Observatory

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 L1

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

DOI

10.1088/2041-8205/808/1/l1

More information

Created

10/7/2017