Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign

C. Goddi; I. Martí-Vidal; H. Messias; G. B. Crew; R. Herrero-Illana; V. Impellizzeri; H. Rottmann; J. Wagner; E. Fomalont; L. D. Matthews; D. Petry; N. Phillips; R. Tilanus; E. Villard; L. Blackburn; M. Janssen; M. Wielgus

doi:10.1088/1538-3873/ab136a

Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign

C. Goddi, I. Martí-Vidal, H. Messias, G. B. Crew, R. Herrero-Illana, V. Impellizzeri, H. Rottmann, J. Wagner, E. Fomalont, L. D. Matthews, D. Petry, N. Phillips, R. Tilanus, E. Villard, L. Blackburn, M. Janssen, M. Wielgus

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52 Scopus citations

Abstract

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.

Original language	English (US)
Article number	075003
Journal	Publications of the Astronomical Society of the Pacific
Volume	131
Issue number	1001
DOIs	https://doi.org/10.1088/1538-3873/ab136a
State	Published - Jul 2019
Externally published	Yes

Keywords

(galaxies:) quasars: general
astronomical databases: miscellaneous
instrumentation: interferometers
methods: data analysis
methods: observational
submillimeter: galaxies
submillimeter: general
surveys
techniques: high angular resolution
techniques: interferometric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/1538-3873/ab136a

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Goddi, C., Martí-Vidal, I., Messias, H., Crew, G. B., Herrero-Illana, R., Impellizzeri, V., Rottmann, H., Wagner, J., Fomalont, E., Matthews, L. D., Petry, D., Phillips, N., Tilanus, R., Villard, E., Blackburn, L., Janssen, M., & Wielgus, M. (2019). Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign. Publications of the Astronomical Society of the Pacific, 131(1001), Article 075003. https://doi.org/10.1088/1538-3873/ab136a

Goddi, C, Martí-Vidal, I, Messias, H, Crew, GB, Herrero-Illana, R, Impellizzeri, V, Rottmann, H, Wagner, J, Fomalont, E, Matthews, LD, Petry, D, Phillips, N, Tilanus, R, Villard, E, Blackburn, L, Janssen, M & Wielgus, M 2019, 'Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign', Publications of the Astronomical Society of the Pacific, vol. 131, no. 1001, 075003. https://doi.org/10.1088/1538-3873/ab136a

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abstract = "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.",

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AU - Martí-Vidal, I.

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AU - Crew, G. B.

AU - Herrero-Illana, R.

AU - Impellizzeri, V.

AU - Rottmann, H.

AU - Wagner, J.

AU - Fomalont, E.

AU - Matthews, L. D.

AU - Petry, D.

AU - Phillips, N.

AU - Tilanus, R.

AU - Villard, E.

AU - Blackburn, L.

AU - Janssen, M.

AU - Wielgus, M.

PY - 2019/7

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N2 - 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.

AB - 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.

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KW - surveys

KW - techniques: high angular resolution

KW - techniques: interferometric

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Calibration of ALMA as a Phased Array. ALMA Observations During the 2017 VLBI Campaign

Abstract

Keywords

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