Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign
Journal article, 2019
We present a detailed description of the special procedures for calibration and quality assurance of Atacama Large Millimeter/submillimeter Array (ALMA) observations in Very Long Baseline Interferometry (VLBI) mode. These procedures are required to turn the phased ALMA array into a fully calibrated VLBI station. As an illustration of these methodologies, we present full-polarization observations carried out with ALMA as a phased array at 3 mm (Band 3) and 1.3 mm (Band 6) as part of Cycle-4. These are the first VLBI science observations conducted with ALMA and were obtained during a 2017 VLBI campaign in concert with other telescopes worldwide as part of the Global mm-VLBI Array (GMVA, April 1-3) and the Event Horizon Telescope (EHT, April 5-11) in ALMA Bands 3 and 6, respectively.
submillimeter: galaxies
methods: data analysis
techniques: high angular resolution
surveys
submillimeter: general
instrumentation: interferometers
(galaxies:) quasars: general
techniques: interferometric
methods: observational
astronomical databases: miscellaneous
Author
C. Goddi
Radboud University
Leiden University
Ivan Marti-Vidal
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Yebes Observatory
H. Messias
Atacama Large Millimeter-submillimeter Array (ALMA)
G. B. Crew
Massachusetts Institute of Technology (MIT)
R. Herrero-Illana
European Southern Observatory Santiago
V. Impellizzeri
Atacama Large Millimeter-submillimeter Array (ALMA)
H. Rottmann
Max Planck Society
J. Wagner
Max Planck Society
E. Fomalont
Atacama Large Millimeter-submillimeter Array (ALMA)
L. D. Matthews
Massachusetts Institute of Technology (MIT)
D. Petry
European Southern Observatory Santiago
R. Tilanus
Leiden University
Radboud University
E. Villard
Atacama Large Millimeter-submillimeter Array (ALMA)
L. Blackburn
Harvard-Smithsonian Center for Astrophysics
M. Janssen
Radboud University
M. Wielgus
Harvard-Smithsonian Center for Astrophysics
Harvard University
Publications of the Astronomical Society of the Pacific
0004-6280 (ISSN) 1538-3873 (eISSN)
Vol. 131 1001 075003Subject Categories
Meteorology and Atmospheric Sciences
Astronomy, Astrophysics and Cosmology
DOI
10.1088/1538-3873/ab136a