The 2014 ALMA Long Baseline Campaign: An Overview

0449439 - ASÚ 2016 RIV US eng J - Journal Article
Fomalont, E.B. - Vlahakis, C. - Corder, S. - Remijan, A. - Barkats, D. - Lucas, R. - Hunter, T.R. - Brogan, C.L. - Asaki, Y. - Matsushita, S. - Dent, W.R.F. - Hills, R.E. - Phillips, N. - Richards, A.M.S. - Cox, P. - Amestica, R. - Broguiere, D. - Cotton, W. - Hales, A.S. - Hiriart, R. - Hirota, A. - Hodge, J.A. - Impellizzeri, C.M.V. - Kern, J. - Kneissl, R. - Liuzzo, E. - Marcelino, N. - Marson, R. - Mignano, A. - Nakanishi, K. - Nikolic, B. - Perez, J.E. - Perez, L.M. - Toledo, I. - Bárta, Miroslav - Jáchym, Pavel - Karlický, Marian - Kraus, Michaela - Kunneriath, Devaky … Total 248 authors
The 2014 ALMA Long Baseline Campaign: An Overview.
Astrophysical Journal Letters. Roč. 808, č. 1 (2015), L1/1-L1/11. ISSN 2041-8205. E-ISSN 2041-8213
Institutional support: RVO:67985815
Keywords : interferometers * submillimeter * high angular resolution
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 5.487, year: 2015

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.
Permanent Link: http://hdl.handle.net/11104/0251156