Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign
| Autor: | Maciek Wielgus, Violette Impellizzeri, Remo P. J. Tilanus, Lynn D. Matthews, Rubén Herrero-Illana, Hugo Messias, Ed Fomalont, Michael Janssen, E. Villard, Ciriaco Goddi, Jan Wagner, Geoffrey B. Crew, D. Petry, N. Phillips, Ivan Marti-Vidal, Helge Rottmann, Lindy Blackburn |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Phased array Calibration (statistics) Astronomy FOS: Physical sciences Astronomy and Astrophysics 01 natural sciences Space and Planetary Science 0103 physical sciences Very-long-baseline interferometry Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Publications of the Astronomical Society of the Pacific, 131(1001), 075003 Publications of the Astronomical Society of the Pacific, 131, 1001, pp. 1-34 Publications of the Astronomical Society of the Pacific, 131, 1-34 |
| ISSN: | 0004-6280 |
| Popis: | 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 3mm (Band 3) and 1.3mm (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. 39 pages, 20 figures, 10 tables, accepted by PASP |
| Databáze: | OpenAIRE |
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