THE 2014 ALMA LONG BASELINE CAMPAIGN: AN OVERVIEW

Alma Partnership E. B. Fomalont 1 C. Vlahakis S. Corder A. Remijan 1 D. Barkats 2 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 3 R. Amestica D. Broguiere W. Cotton A. S. Hales R. Hiriart A. Hirota J. A. Hodge 4 C. M. V. Impellizzeri J. Kern 5 R. Kneissl E. Liuzzo N. Marcelino 6 R. Marson A. Mignano 7 K. Nakanishi B. Nikolic J. E. Perez L. M. Pérez I. Toledo R. Aladro B. Butler J. Cortes 1 P. Cortes 1 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 8 J. Mangum G. Marconi H. Nagai L.-A. Nyman 9 M. Radiszcz J. A. Rodón T. Sawada 10 S. Takahashi R. P. J. Tilanus T. Van Kempen B. Vila Vilaro L. C. Watson 11 T. Wiklind 12 F. Gueth 13 K. Tatematsu A. Wootten A. Castro-Carrizo E. Chapillon 14 G. Dumas 13 I. de Gregorio-Monsalvo H. Francke J. Gallardo 15 J. Garcia 16 S. Gonzalez 17 J. E. Hibbard T. Hill T. Kaminski 18 A. Karim M. Krips 13 Y. Kurono C. Lopez 19 S. Martin 20 L. Maud F. Morales 21 V. Pietu 13 K. Plarre G. Schieven L. Testi 22, 23 L. Videla 24 E. Villard 25, 26 N. Whyborn M. A. Zwaan F. Alves 27 P. Andreani A. Avison M. Barta 28 F. Bedosti G. J. Bendo F. Bertoldi 29 M. Bethermin A. Biggs J. Boissier 13 J. Brand S. Burkutean V. Casasola 7 J. Conway L. Cortese 30 B. Dabrowski 31 T. A. Davis 32 M. Diaz Trigo F. Fontani R. Franco-Hernandez G. Fuller 33 R. Galvan Madrid A. Giannetti A. Ginsburg S. F. Graves E. Hatziminaoglou M. Hogerheijde 34 P. Jachym I. Jimenez Serra M. Karlicky 28 P. Klaasen M. Kraus 35 D. Kunneriath C. Lagos S. Longmore 36 S. Leurini 29 M. Maercker B. Magnelli I. Marti Vidal M. Massardi 7 A. Maury 37 S. Muehle S. Muller 38 T. Muxlow E. O’gorman R. Paladino D. Petry J. Pineda 39 S. Randall J. S. Richer A. Rossetti 40 A. Rushton K. Rygl A. Sanchez Monge 41 R. Schaaf P. Schilke 42 T. Stanke M. Schmalzl F. Stoehr 30 S. Urban 43 E. Van Kampen W. Vlemmings K. Wang W. Wild Y. Yang S. Iguchi T. Hasegawa M. Saito J. Inatani N. Mizuno 2, 44 S. Asayama G. Kosugi K.-I. Morita K. Chiba S. Kawashima S. K. Okumura N. Ohashi 45 R. Ogasawara S. Sakamoto 46 T. Noguchi Y.-D. Huang 47 S.-Y. Liu 48 F. Kemper P. M. Koch 49 M.-T. Chen Y. Chikada M. Hiramatsu D. Iono M. Shimojo S. Komugi J. Kim 50, 51 A.-R. Lyo E. Muller 52 C. Herrera 53 R. E. Miura 54 J. Ueda J. Chibueze Y.-N. Su A. Trejo-Cruz K.-S. Wang H. Kiuchi N. Ukita M. Sugimoto 55 R. Kawabe M. Hayashi 56 S. Miyama P. T. P. Ho N. Kaifu M. Ishiguro 57 A. J. Beasley S. Bhatnagar 58 J. A. Braatz Iii D. G. Brisbin N. Brunetti C. Carilli 59 J. H. Crossley L. D’addario J. L. Donovan Meyer 60 D. T. Emerson 61 A. S. Evans 62 P. Fisher K. Golap D. M. Griffith 63 A. E. Hale 64 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 65 H. S. Liszt 1 C. J. Lonsdale B. Matthews M. Mckinnon B. S. Mason 66 G. Moellenbrock A. Moullet S. T. Myers J. Ott 67 A. B. Peck J. Pisano S. J. E. Radford W. T. Randolph U. Rao Venkata M. G. Rawlings R. Rosen S. L. Schnee K. S. Scott N. K. Sharp K. Sheth R. S. Simon 1 T. Tsutsumi S. J. Wood 68
14 AMOR 2015
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], UB - Université de Bordeaux, INSU - CNRS - Institut national des sciences de l'Univers, CNRS - Centre National de la Recherche Scientifique
46 Equipe Espaces acoustiques et cognitifs
STMS - Sciences et Technologies de la Musique et du Son
Abstract : 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 ~15 km. To develop and test this capability, a Long Baseline Campaign (LBC) was carried out from September to late November 2014, 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 3C138 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 ~350 GHz. Observing with ALMA on baselines of up to 15 km is now possible, and opens up new parameter space for submm astronomy.
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Submitted on : Wednesday, April 22, 2015 - 9:01:40 AM
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Alma Partnership, E. B. Fomalont, C. Vlahakis, S. Corder, A. Remijan, et al.. THE 2014 ALMA LONG BASELINE CAMPAIGN: AN OVERVIEW. Astrophysical Journal Letters, 2015, 808 (1), pp.id. L1. ⟨10.1088/2041-8205/808/1/L1⟩. ⟨hal-01144571⟩

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