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1. The Karl G. Jansky Very Large Array Sky Survey (VLASS). Science Case and Survey Design

Author

Mattia Vaccari, Mark Lacy, Ilsang Yoon, Kunal Mooley, Matt J. Jarvis, Mark Birkinshaw, Shude Mao, L.O. Sjouwerman, Amy Kimball, Shea Brown, Geoffrey C. Bower, Susana E. Deustua, W. N. Brandt, Bryan Gaensler, Jacqueline Hodge, D.K. Lyons, Gregory R. Sivakoff, Tracy E. Clarke, J. Masters, Željko Ivezić, J. Marvil, T. Guth, R. Hiriart, Wendy Peters, Steven T. Myers, Sarah Burke-Spolaor, Stefi A. Baum, Gregg Hallinan, Hai Fu, Tony Mroczkowski, Heinz Andernach, Simona Giacintucci, S. Bhatnager, Jamie Farnes, Russ Taylor, Frank K. Schinzel, Jayanne English, M. Mezcua, Laurent Loinard, Y. Shen, Julia M. Comerford, Shami Chatterjee, Assaf Horesh, Bryan J. Butler, K. Radford, J. Salcido, N. E. Kassim, Eric J. Murphy, Lawrence Rudnick, D. Medlin, U. Rao, Rachel A. Osten, Christopher A. Hales, Peter K. G. Williams, G. A. Moellenbrock, A. Sobotka, Nicole E. Gugliucci, Paul Demorest, R. L. White, Xin Liu, Christopher P. O'Dea, James Robnett, T. J. W. Lazio, Brian R. Kent, Atish Kamble, Anthony Beasley, Casey J. Law, Claire J. Chandler, Erik Rosolowsky, Edo Berger, J. M. Wrobel, S. Witz, K. Golap, R. J. van Weeren, Gordon T. Richards, Shane O'Sullivan, Kristina Nyland, A. Vargas, National Aeronautics and Space Administration (US), Comisión Nacional de Investigación Científica y Tecnológica (Chile), National Science Foundation (US), and German Research Foundation

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Very large array, general [Radio continuum], 010308 nuclear & particles physics, media_common.quotation_subject, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Survey research, Surveys, Astrophysics - Astrophysics of Galaxies, 7. Clean energy, 01 natural sciences, Jansky, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, media_common
Abstract

et al., arXiv:1907.01981v3, The Very Large Array Sky Survey (VLASS) is a synoptic, all-sky radio sky survey with a unique combination of high angular resolution (≈2farcs5), sensitivity (a 1σ goal of 70 μJy/beam in the coadded data), full linear Stokes polarimetry, time domain coverage, and wide bandwidth (2–4 GHz). The first observations began in 2017 September, and observing for the survey will finish in 2024. VLASS will use approximately 5500 hr of time on the Karl G. Jansky Very Large Array (VLA) to cover the whole sky visible to the VLA (decl. > −40°), a total of 33 885 deg${}^{2}$. The data will be taken in three epochs to allow the discovery of variable and transient radio sources. The survey is designed to engage radio astronomy experts, multi-wavelength astronomers, and citizen scientists alike. By utilizing an "on the fly" interferometry mode, the observing overheads are much reduced compared to a conventional pointed survey. In this paper, we present the science case and observational strategy for the survey, and also results from early survey observations., The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. CIRADA is funded by a grant from the Canada Foundation for Innovation 2017 Innovation Fund (Project 35999), as well as by the Provinces of Ontario, British Columbia, Alberta, Manitoba and Quebec. This research made use of NASA’s Astrophysics Data System (ADS) Abstract Service. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. S.C. acknowledges support from the NSF (AAG 1815242). S.C. and T.J.W.L. are members of the NANOGrav Physics Frontier Center, which is supported by the NSF (award number 1430284. C.J.L. is supported by NSF award 1611606. Partial support for the work of L. Rudnick comes from NSF grants AST-1211595 and 1714205 to the University of Minnesota. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant No. ACI1548562. H.A. benefited from grant CIIC 218/2019 of the University of Guanajuato, Mexico. B.R.K. acknowledges support from the NRAO NINE program and Office of Diversity and Inclusion. G.R.S. acknowledges support from NSERC Discovery Grant RGPIN-06569-2016. S.B.S. is supported by NSF award #1458952. S.P.O. acknowledges financial support from the Deutsche Forschungsgemeinschaft (DFG) under grant BR2026/23. L.L. acknowledges the financial support of DGAPA, UNAM (IN112417), and CONACyT, Mexico.

Published
2020
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2. The 2014 ALMA Long Baseline Campaign: An Overview

Author

ALMA Partnership, E. B. Fomalont, C. Vlahakis, S. Corder, A. Remijan, D. Barkats, 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, R. Amestica, D. Broguiere, W. Cotton, A. S. Hales, R. Hiriart, A. Hirota, J. A. Hodge, C. M. V. Impellizzeri, J. Kern, R. Kneissl, E. Liuzzo, N. Marcelino, R. Marson, A. Mignano, K. Nakanishi, B. Nikolic, J. E. Perez, L. M. Pérez, I. Toledo, R. Aladro, B. Butler, J. Cortes, P. Cortes, 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, J. Mangum, G. Marconi, H. Nagai, L.-A. Nyman, M. Radiszcz, J. A. Rodón, T. Sawada, S. Takahashi, R. P. J. Tilanus, T. van Kempen, B. Vila Vilaro, L. C. Watson, T. Wiklind, F. Gueth, K. Tatematsu, A. Wootten, A. Castro-Carrizo, E. Chapillon, G. Dumas, I. de Gregorio-Monsalvo, H. Francke, J. Gallardo, J. Garcia, S. Gonzalez, J. E. Hibbard, T. Hill, T. Kaminski, A. Karim, M. Krips, Y. Kurono, C. Lopez, S. Martin, L. Maud, F. Morales, V. Pietu, K. Plarre, G. Schieven, L. Testi, L. Videla, E. Villard, N. Whyborn, M. A. Zwaan, F. Alves, P. Andreani, A. Avison, M. Barta, F. Bedosti, G. J. Bendo, F. Bertoldi, M. Bethermin, A. Biggs, J. Boissier, J. Brand, S. Burkutean, V. Casasola, J. Conway, L. Cortese, B. Dabrowski, T. A. Davis, M. Diaz Trigo, F. Fontani, R. Franco-Hernandez, G. Fuller, R. Galvan Madrid, A. Giannetti, A. Ginsburg, S. F. Graves, E. Hatziminaoglou, M. Hogerheijde, P. Jachym, I. Jimenez Serra, M. Karlicky, P. Klaasen, M. Kraus, D. Kunneriath, C. Lagos, S. Longmore, S. Leurini, M. Maercker, B. Magnelli, I. Marti Vidal, M. Massardi, A. Maury, S. Muehle, S. Muller, T. Muxlow, E. O’Gorman, R. Paladino, D. Petry, J. Pineda, S. Randall, J. S. Richer, A. Rossetti, A. Rushton, K. Rygl, A. Sanchez Monge, R. Schaaf, P. Schilke, T. Stanke, M. Schmalzl, F. Stoehr, S. Urban, E. van Kampen, W. Vlemmings, K. Wang, W. Wild, Y. Yang, S. Iguchi, T. Hasegawa, M. Saito, J. Inatani, N. Mizuno, S. Asayama, G. Kosugi, K.-I. Morita, K. Chiba, S. Kawashima, S. K. Okumura, N. Ohashi, R. Ogasawara, S. Sakamoto, T. Noguchi, Y.-D. Huang, S.-Y. Liu, F. Kemper, P. M. Koch, M.-T. Chen, Y. Chikada, M. Hiramatsu, D. Iono, M. Shimojo, S. Komugi, J. Kim, A.-R. Lyo, E. Muller, C. Herrera, R. E. Miura, J. Ueda, J. Chibueze, Y.-N. Su, A. Trejo-Cruz, K.-S. Wang, H. Kiuchi, N. Ukita, M. Sugimoto, R. Kawabe, M. Hayashi, S. Miyama, P. T. P. Ho, N. Kaifu, M. Ishiguro, A. J. Beasley, S. Bhatnagar, J. A. Braatz III, D. G. Brisbin, N. Brunetti, C. Carilli, J. H. Crossley, L. D’Addario, J. L. Donovan Meyer, D. T. Emerson, A. S. Evans, P. Fisher, K. Golap, D. M. Griffith, A. E. Hale, 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, H. S. Liszt, C. J. Lonsdale, B. Matthews, M. McKinnon, B. S. Mason, G. Moellenbrock, A. Moullet, S. T. Myers, J. Ott, 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, T. Tsutsumi, S. J. Wood, National Radio Astronomy Observatory (NRAO), Joint ALMA Observatory (JAO), European Southern Observatory (ESO)-National Radio Astronomy Observatory (NRAO), Institute for Ethnomedicine, University of Wyoming (UW), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Chimie des métaux de transition et catalyse (CMTC), Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I, Istituto di Radioastronomia [Bologna] (IRA), Istituto Nazionale di Astrofisica (INAF), Institut Jacques Monod (IJM (UMR_7592)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), ESO, European Southern Observatory (ESO), Department of Organic and Polymeric Materials, Tokyo Institute of Technology [Tokyo] (TITECH), Biogeochemistry Research Centre, School of Chemistry, Onsala Space Observatory, Chalmers University of Technology [Göteborg], Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), AMOR 2015, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Departamento de Analisis Matematico, Universidad de Málaga [Málaga] = University of Málaga [Málaga], Unité de recherche Zoologie Forestière (URZF), Institut National de la Recherche Agronomique (INRA), IFP Energies nouvelles (IFPEN), Fastopt GmbH, D-20357 Hamburg, Germany, Mathématiques Appliquées Paris 5 (MAP5 - UMR 8145), Université Paris Descartes - Paris 5 (UPD5)-Institut National des Sciences Mathématiques et de leurs Interactions (INSMI)-Centre National de la Recherche Scientifique (CNRS), Departament de Ecologia, Universitat d'Alacant, Centro de Estudios Ambientales del Mediterraneo, INAF - Osservatorio Astrofisico di Arcetri (OAA), Faculty of Medicine, Universidad de Chile = University of Chile [Santiago] (UCHILE), Université Pierre et Marie Curie - Paris 6 (UPMC), Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Institute of cardiometabolism and nutrition (ICAN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU), Laboratoire de génie électrique de Paris (LGEP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Astronomical Institute of the Czech Academy of Sciences (ASU / CAS), Czech Academy of Sciences [Prague] (CAS), Max-Planck-Institut für Radioastronomie (MPIFR), Northern Illinois University (NORTHERN ILLINOIS UNIVERSITY), Northern Illinois University, Centre for Astrophysics Research [Hatfield], University of Hertfordshire [Hatfield] (UH), Jodrell Bank Centre for Astrophysics (JBCA), University of Manchester [Manchester], foreign laboratories (FL), CERN [Genève], Departements of Medicine and Microbiology, University of Alabama [Tuscaloosa] (UA), Swinburne University of Technology (Hawthorn campus), San Pedro de Atacama Celestial Explorations (SPACE), San Pedro de Atacama Celestial Explorations, General Electric Medical Systems [Buc] (GE Healthcare), General Electric Medical Systems, Laboratoire de Radiopathologie (LRP), Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Università degli Studi di Milano [Milano] (UNIMI), Altération génétique des cancers, chimioprévention et réponse thérapeutique, Physikalisches Institut [Köln], Universität zu Köln, Ministère de la santé, National Astronomical Observatory of Japan (NAOJ), National Institute for Materials Science (NIMS), Espaces acoustiques et cognitifs (EAC), Sciences et Technologies de la Musique et du Son (STMS), Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Département de Mathématiques et Applications - ENS Paris (DMA), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Department of Chemistry and Biochemistry [Bern], University of Bern, Academia Sinica, Department of Marine Organic Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Faculty of Geosciences, Utrecht University, Faculty of Geosciences, Brain Mind Institute (BMI - EPFL), Ecole Polytechnique Fédérale de Lausanne (EPFL), Departamento de Ingenieria Eléctrica (DIE), Universidad de Concepción [Chile], Laboratório de Bioinformática, Embrapa Recursos Genéticos e Biotecnologia, Graduate School of Engineering [The Univ of Tokyo] (UTokyo), The University of Tokyo (UTokyo), Kyushu University [Fukuoka], Mitsubishi Research Institute, Inc., Department of Computer Science and Automation [Bangalore] (CSA), Indian Institute of Science [Bangalore] (IISc Bangalore), National Radio Astronomy Observatory [Socorro] (NRAO), Occupational Physiology Laboratory (Vandœuvre-Les -Nancy, France), Computational Science and Engineering Department [Daresbury] (STFC), Science & Technologie Facilities Council, University College of London [London] (UCL), Centre for Atmospheric Chemistry [Wollongong] (CAC), University of Wollongong [Australia], Safety science group, Delft University of Technology (TU Delft), Centre d'Investigation Clinique - Innovation Technologique - INSERM - CHU de Grenoble (CIC-IT Grenoble (CIT803)), CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes (UGA), Northern Research Station, Forest Research [Great Britain], Department of Helsinki Institute for Information Technology Communications and Networking, Aalto University, University of Washington [Seattle], Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Astronomy, Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Research Unit on Cardiovascular and Metabolic Diseases (ICAN), Università degli Studi di Milano = University of Milan (UNIMI), Universität zu Köln = University of Cologne, Universidad de Concepción - University of Concepcion [Chile], Kyushu University, Istituto di Radioastronomia (IRA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Universidad de Málaga [Málaga], Unité de recherche Zoologie Forestière (UZF), Science et Technologie du Lait et de l'Oeuf (STLO), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Mathématiques et de leurs Interactions (INSMI)-Université Paris Descartes - Paris 5 (UPD5), University of Chile [Santiago], Université Pierre et Marie Curie - Paris 6 (UPMC)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [APHP], Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-SUPELEC-Centre National de la Recherche Scientifique (CNRS), Astronomical Institute of the Czech Academy of Sciences, Czech Academy of Sciences [Prague] (ASCR), Jodrell Bank Centre for Astrophysics, School of Physics, Università degli studi di Milano [Milano], National Institute of Materials Science, Equipe Espaces acoustiques et cognitifs, Université Pierre et Marie Curie - Paris 6 (UPMC)-IRCAM-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-IRCAM-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry and Biochemistry, Graduate School of Engineering [Tokyo], The University of Tokyo, Center for Atmospheric Chemistry [Wollongong] (CAC), University of Wollongong, CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Joseph Fourier - Grenoble 1 (UJF), Forest Research, Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), École normale supérieure - Paris (ENS Paris), Université Grenoble Alpes (UGA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Grenoble, Joint ALMA Office (JAO), ALMA, Institut Jacques Monod (IJM), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Mathématiques et de leurs Interactions-Université Paris Descartes - Paris 5 (UPD5), ALMA Observatory, Laboratoire d'analyse et d'architecture des systèmes [Toulouse] (LAAS), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique [Toulouse] (INP), Center for Brain Simulation, Ecole Polytechnique Fédérale de Lausanne, Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble-Institut National de la Santé et de la Recherche Médicale (INSERM), National Radio Astronomy Observatory ( NRAO ), Joint ALMA Office ( JAO ), University of Wyoming ( UW ), Max-Planck-Institut für Astronomie ( MPIA ), Chimie des métaux de transition et catalyse ( CMTC ), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique ( CNRS ), Istituto di Radioastronomia ( IRA ), Istituto Nazionale di Astrofisica ( INAF ), Institut Jacques Monod ( IJM ), Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), European Southern Observatory ( ESO ), Tokyo Institute of Technology [Tokyo] ( TITECH ), Institut de RadioAstronomie Millimétrique ( IRAM ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Bordeaux [Pessac] ( LAB ), Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Unité de recherche Zoologie Forestière ( UZF ), Institut National de la Recherche Agronomique ( INRA ), IFP Energies nouvelles ( IFPEN ), Science et Technologie du Lait et de l'Oeuf ( STLO ), Institut National de la Recherche Agronomique ( INRA ) -AGROCAMPUS OUEST, Mathématiques Appliquées à Paris 5 ( MAP5 - UMR 8145 ), Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National des Sciences Mathématiques et de leurs Interactions-Centre National de la Recherche Scientifique ( CNRS ), INAF - Osservatorio Astrofisico di Arcetri ( OAA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ), Unité de Recherche sur les Maladies Cardiovasculaires, du Métabolisme et de la Nutrition = Institute of cardiometabolism and nutrition ( ICAN ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Assistance publique - Hôpitaux de Paris (AP-HP)-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -CHU Pitié-Salpêtrière [APHP], Laboratoire de génie électrique de Paris ( LGEP ), Université Paris-Sud - Paris 11 ( UP11 ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -SUPELEC-Centre National de la Recherche Scientifique ( CNRS ), Czech Academy of Sciences [Prague] ( ASCR ), Max-Planck-Institut für Radioastronomie ( MPIFR ), Northern Illinois University ( NORTHERN ILLINOIS UNIVERSITY ), Canadian Space Agency, foreign laboratories ( FL ), University of Alabama [Tuscaloosa] ( UA ), San Pedro de Atacama Celestial Explorations ( SPACE ), General Electric Medical Systems [Buc] ( GE Healthcare ), Laboratoire de Radiopathologie ( LRP ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Max Planck Institute for Biochemistry, Max-Planck-Institut, Department of Virology, Global COE Program, Nagasaki University-Institute of Tropical Medicine, Sciences et Technologies de la Musique et du Son ( STMS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -IRCAM-Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -IRCAM-Centre National de la Recherche Scientifique ( CNRS ), Département de Mathématiques et Applications - ENS Paris ( DMA ), École normale supérieure - Paris ( ENS Paris ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'analyse et d'architecture des systèmes [Toulouse] ( LAAS ), Centre National de la Recherche Scientifique ( CNRS ) -Université Toulouse III - Paul Sabatier ( UPS ), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Institut National Polytechnique [Toulouse] ( INP ), Royal Netherlands Institute for Sea Research ( NIOZ ), Departamento de Ingenieria Eléctrica ( DIE ), AUTRES, Department of Computer Science and Automation [Bangalore] ( CSA ), Indian Institute of Science [Bangalore] ( IISc Bangalore ), National Radio Astronomy Observatory [Socorro] ( NRAO ), Computational Science and Engineering Department [Daresbury] ( STFC ), University College of London [London] ( UCL ), Center for Atmospheric Chemistry [Wollongong] ( CAC ), Delft University of Technology ( TU Delft ), Service Hématologie, Hôpital Morvan [Brest]-Centre Hospitalier Régional Universitaire de Brest ( CHRU Brest ), Centre d'Investigation Clinique - Innovation Technologique - INSERM - CHU de Grenoble ( CIC-IT Grenoble (CIT803) ), and Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre Hospitalier Universitaire de Grenoble

Subjects
[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], techniques: high angular resolution, Astronomy and Astrophysics, submillimeter: general, telescopes, Submillimeter Array, [ SDU.ASTR.CO ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Space and Planetary Science, techniques: interferometric, Environmental science, Millimeter, Baseline (configuration management), instrumentation: interferometers, QB, Remote sensing
Abstract

著者人数: 248名, Accepted: 2015-04-10, 資料番号: SA1150145000

Published
2015
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3. The ALMA Phasing System: A Beamforming Capability for Ultra-high-resolution Science at (Sub)Millimeter Wavelengths

Author

Neil M. Nagar, M. Mora-Klein, Sheperd S. Doeleman, R. Treacy, Walter Alef, Ivan Marti-Vidal, Makoto Inoue, Kazunori Akiyama, Tomoaki Oyama, Hugo Messias, Mareki Honma, Hiroaki Nishioka, B. Shillue, Richard Lacasse, Michael H. Hecht, D. Broguiere, Akihiko Hirota, R. Hiriart, Y. Kohno, Nicolas Pradel, Zheng Meyer-Zhao, Denis Barkats, Victor Pankratius, J. M. Anderson, S. Suzuki, Joe Greenberg, Chet Ruszczyk, Jesus Perez, Alan L. Roy, Vincent L. Fish, Geoffrey B. Crew, Lynn D. Matthews, Alain Baudry, Rodrigo Amestica, R. Escoffier, Alejandro Saez, Caterina M. V. Impellizzeri, Paul T. P. Ho, B. Lopez, Helge Rottmann, N. Phillips, Matière et Systèmes Complexes (MSC (UMR_7057)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Centre Européen de Réalité Virtuelle (CERV), École Nationale d'Ingénieurs de Brest (ENIB), FORMATION STELLAIRE 2018, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Atmospheric Chemistry Division [Boulder], National Center for Atmospheric Research [Boulder] (NCAR), Joint ALMA Observatory (JAO), European Southern Observatory (ESO)-National Radio Astronomy Observatory (NRAO), Laboratoire Gemini (LG), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), University of Wisconsin-Madison, CRITT Matériaux, Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Beamforming, 010504 meteorology & atmospheric sciences, Aperture, Computer science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Submillimeter Array, Optics, Pulsar, 0103 physical sciences, Very-long-baseline interferometry, Angular resolution, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Phaser, Space and Planetary Science, Millimeter, [SDU.ASTR.GA]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], Astrophysics - Instrumentation and Methods for Astrophysics, business
Abstract

The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual ALMA antennas and record the aggregate sum in Very Long Baseline Interferometry (VLBI) Data Exchange Format. These beamforming capabilities allow the ALMA array to collectively function as the equivalent of a single large aperture and participate in global VLBI arrays. The inclusion of phased ALMA in current VLBI networks operating at (sub)millimeter wavelengths provides an order of magnitude improvement in sensitivity, as well as enhancements in u-v coverage and north-south angular resolution. The availability of a phased ALMA enables a wide range of new ultra-high angular resolution science applications, including the resolution of supermassive black holes on event horizon scales and studies of the launch and collimation of astrophysical jets. It also provides a high-sensitivity aperture that may be used for investigations such as pulsar searches at high frequencies. This paper provides an overview of the ALMA Phasing System design, implementation, and performance characteristics., Accepted to PASP; 23 pages

Published
2017
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5. Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey

Author

A. Rest, C. Stubbs, A. C. Becker, G. A. Miknaitis, A. Miceli, R. Covarrubias, S. L. Hawley, R. C. Smith, N. B. Suntzeff, K. Olsen, J. L. Prieto, R. Hiriart, D. L. Welch, K. H. Cook, S. Nikolaev, M. Huber, G. Prochtor, A. Clocchiatti, D. Minniti, A. Garg, P. Challis, S. C. Keller, and B. P. Schmidt

Subjects
Physics, 010308 nuclear & particles physics, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Gravitational microlensing, 01 natural sciences, Power (physics), Dark matter halo, Stars, Space and Planetary Science, 0103 physical sciences, Large Magellanic Cloud, 010303 astronomy & astrophysics, Optical depth, Luminosity function (astronomy), Event (probability theory)
Abstract

Characterizing the nature and spatial distribution of the lensing objects that produce the previously measured microlensing optical depth toward the Large Magellanic Cloud (LMC) remains an open problem. We present an appraisal of the ability of the SuperMACHO Project, a next-generation microlensing survey directed toward the LMC, to discriminate between various proposed lensing populations. We consider two scenarios: lensing by a uniform foreground screen of objects and self-lensing by LMC stars. We have carried out extensive simulations, based upon data obtained during the first year of the project, to assess the SuperMACHO survey's ability to discriminate between these two scenarios. We find that the event rate itself shows significant sensitivity to the choice of the LMC luminosity function, limiting the conclusions which can be drawn from the absolute rate. If instead we determine the differential event rate across the LMC, we will decrease the impact of these systematic biases and render our conclusions more robust. With this approach the SuperMACHO Project should be able to distinguish between the two categories of lens populations. This will provide important constraints on the nature of the lensing objects and their contributions to the Galactic dark matter halo., Comment: 40 pages, 9 figures, to appear in ApJ 634 (2005)

Published
2005
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6. The SuperMACHO Microlensing Survey

Author

K. H. Cook, C. Aguilera, Robert Connon Smith, Gajus Miknaitis, Arti Garg, Andrew C. Becker, Sergei Nikolaev, Stefan C. Keller, Knut Olsen, Dante Minniti, Suzanne L. Hawley, Christopher W. Stubbs, Douglas L. Welch, Antonino Miceli, Brian P. Schmidt, J. L. Prieto, Alejandro Clocchiatti, Armin Rest, Ricardo Covarrubias, R. Hiriart, and Nicholas B. Suntzeff

Subjects
Physics, education.field_of_study, Population, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Gravitational microlensing, Light curve, law.invention, Galactic halo, Telescope, Space and Planetary Science, law, education, Large Magellanic Cloud
Abstract

We present the first results from our next-generation microlensing survey, the SuperMACHO project. We are using the CTIO 4m Blanco telescope and the MOSAIC imager to carry out a search for microlensing toward the Large Magellanic Cloud (LMC). We plan to ascertain the nature of the population responsible for the excess microlensing rate seen by the MACHO project. Our observing strategy is optimized to measure the differential microlensing rate across the face of the LMC. We find this derivative to be relatively insensitive to the details of the LMC's internal structure but a strong discriminant between Galactic halo and LMC self lensing. In December 2003 we completed our third year of survey operations. 2003 also marked the first year of real-time microlensing alerts and photometric and spectroscopic followup. We have extracted several dozen microlensing candidates, and we present some preliminary light curves and related information. Similar to the MACHO project, we find SNe behind the LMC to be a significant contaminant - this background has not been completely removed from our current single-color candidate sample. Our follow-up strategy is optimized to discriminate between SNe and true microlensing., Comment: To appear in Proceedings of IAU Symposium 225: Impact of Gravitational Lensing on Cosmology, 6 pages

Published
2004
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7. A Next Generation Microlensing Search: SuperMacho

Author

R. Hiriart, Sergei Nikolaev, A. C. Becker, Andrew J. Drake, N. B. Suntzeff, Chris Smith, Armin Rest, Gajus Miknaitis, Stefan Keller, K. H. Cook, A. Clocchiati, D. L. Welch, Christopher W. Stubbs, Ricardo Covarrubias, B. Schmidt, G. Prochter, and K. A. G. Olsen

Subjects
Physics, Dark matter, Astronomy, Astrophysics, Halo, Gravitational microlensing, Large Magellanic Cloud, Galaxy
Abstract

Past microlensing experiments such as the MACHO project have discovered the presence of a larger than expected number of microlensing events towards the Large Magellanic Cloud (LMC). These events could represent a large fraction of the dark matter in the halo of our Galaxy, if they are indeed due to halo lenses. However, the locations of most of the lenses are poorly defined. The SuperMacho project will detect and follow up ~ 60 microlensing events toward the LMC over the next 5 years. The expected discovery of a number of microlensing events exhibiting special properties due to binarity, etc., will allow us to better determine the location and nature of the lenses causing the LMC microlensing events.

Published
2002
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8. An ALMA beamformer for ultra-high resolution VLBI and phased array science

Author

Alejandro Saez, R. Hiriart, Makoto Inoue, Rich Lacasse, Vincent L. Fish, Michael H. Hecht, B. Shillue, Rodrigo Amestica, Alan L. Roy, Mareki Honma, Joe Greenberg, Geoff Crew, Walter Alef, N. M. Nagar, Colin J. Lonsdale, Chester A. Ruszczyk, Nicolas Pradel, S. Doeleman, Helge Rottmann, and James M. Anderson

Subjects
Physics, Optics, Phased array, business.industry, Very-long-baseline interferometry, business, Ultra high resolution

9. The ALMA Phasing System: A Beamforming Capability for Ultra-high-resolution Science at (Sub)Millimeter Wavelengths.

Author

L. D. Matthews, G. B. Crew, S. S. Doeleman, R. Lacasse, A. F. Saez, W. Alef, K. Akiyama, R. Amestica, J. M. Anderson, D. A. Barkats, A. Baudry, D. Broguière, R. Escoffier, V. L. Fish, J. Greenberg, M. H. Hecht, R. Hiriart, A. Hirota, M. Honma, and P. T. P. Ho

Subjects
HIGH resolution imaging, BEAMFORMING
Abstract

The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has developed and deployed the hardware and software necessary to coherently sum the signals of individual ALMA antennas and record the aggregate sum in Very Long Baseline Interferometry (VLBI) Data Exchange Format. These beamforming capabilities allow the ALMA array to collectively function as the equivalent of a single large aperture and participate in global VLBI arrays. The inclusion of phased ALMA in current VLBI networks operating at (sub)millimeter wavelengths provides an order of magnitude improvement in sensitivity, as well as enhancements in u–v coverage and north–south angular resolution. The availability of a phased ALMA enables a wide range of new ultra-high angular resolution science applications, including the resolution of supermassive black holes on event horizon scales and studies of the launch and collimation of astrophysical jets. It also provides a high-sensitivity aperture that may be used for investigations such as pulsar searches at high frequencies. This paper provides an overview of the ALMA Phasing System design, implementation, and performance characteristics. [ABSTRACT FROM AUTHOR]

Published
2018
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10. Tetanus and penicillin.

Author

SEGERS A and HIRIART R

Subjects
Tetanus therapy, Tetanus Toxoid
Published
1947

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