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The LOFAR long base...
The LOFAR long baseline snapshot calibrator survey
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- Moldón, J. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; University of Twente, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Twente,University of Twente
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- Deller, A. T. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; ShellTechnology Center, India,Netherlands Institute for Radio Astronomy (ASTRON),Shell Technology Center
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- Wucknitz, O. (författare)
- Max-Planck-Institut für Radioastronomie, Germany,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy
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visa fler...
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- Jackson, N. (författare)
- The University of Manchester, UK,University of Manchester
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- Drabent, A. (författare)
- Thüringer Landessternwarte, Germany,Thüringer Landessternwarte Tautenburg,Curtin University,ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),University of Portsmouth,University of Portsmouth, UK ; University of Sydney, Australia ;
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- Carozzi, Tobia, 1966 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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- Conway, John, 1963 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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- Kapinska, A. D. (författare)
- University of Portsmouth, UK ; University of Sydney, Australia ;
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- McKean, J. P. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, Nehterlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Morabito, L. (författare)
- Leiden University, The Netherlands,Universiteit Leiden (UL),Leiden University (UL)
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- Varenius, Eskil, 1986 (författare)
- Chalmers University of Technology,Chalmers tekniska högskola
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- Zarka, P. (författare)
- Univ. Paris-Diderot, France,Centre national de la recherche scientifique (CNRS)
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- Anderson, J. (författare)
- DeutschesGeoForschungsZentrum GFZ, Germany,Deutsches GeoForschungsZentrum (GFZ),German Research Centre for Geosciences (GFZ)
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- Asgekar, A. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; ShellTechnology Center, India,Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Leiden (UL),Leiden University (UL),University Of Oxford,Australian National University,Commonwealth Scientific and Industrial Research Organisation (CSIRO),University of Southampton,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy,ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; Leiden University, The Netherlands,University of Oxford, UK,Australian National University, Australia,CSIRO Australia Telescope National Facility, Australia,Max-Planck-Institut für Radioastronomie, Germany
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- Avruch, I. M. (författare)
- SRON Netherlands Insitute for Space Research, The Netherlands,Netherlands Institute for Space Research (SRON)
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- Bell, M. E. (författare)
- CSIRO Australia Telescope National Facility, Australia,Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Bentum, M. J. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; University of Twente, The Netherlands,Ruhr-Universität Bochum
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- Bernardi, G. (författare)
- Harvard-Smithsonian Center for Astrophysics, USA
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- Best, P. (författare)
- University of Edinburgh, UK
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- Bîrzan, L. (författare)
- Leiden University, The Netherlands,Universiteit Leiden (UL),Leiden University (UL)
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- Bregman, J. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Breitling, F. (författare)
- Leibniz-Institut für Astrophysik Potsdam, Germany,Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam
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- Broderick, J. W. (författare)
- University of Oxford, UK ; University of Southampton UK,University of Southampton,University Of Oxford
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- Brüggen, M. (författare)
- University of Hamburg, Germany,Universität Hamburg
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- Butcher, H. R. (författare)
- Australian National University, Australia,Universiteit Leiden (UL),Leiden University (UL),Leiden University, The Netherlands
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- Carbone, D. (författare)
- University of Amsterdam, The Netherlands,Universiteit Van Amsterdam
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- Ciardi, B. (författare)
- Max Planck Institute for Astrophysics, Germany
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- de Gasperin, F. (författare)
- University of Hamburg, Germany,Universität Hamburg
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- de Geus, E. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; SmarterVision BV, The Netherland,Netherlands Institute for Radio Astronomy (ASTRON),Universität Hamburg,University of Hamburg,Hamburger Sternwarte, Germany
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- Duscha, S. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Universität Bielefeld,Bielefeld University,Universität Bielefeld, Germany
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- Eislöffel, J. (författare)
- Thüringer Landessternwarte, Germany,Thüringer Landessternwarte Tautenburg,Astronomisches Institut der Ruhr-Universität Bochum, Germany
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- Engels, D. (författare)
- Hamburger Sternwarte, Germany
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- Falcke, H. (författare)
- Radboud University Nijmegen, The Netherlands ; ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Radboud Universiteit,Radboud University
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- Fallows, R. A. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Fender, R. (författare)
- University of Oxford, UK,University Of Oxford
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- Ferrari, C. (författare)
- Université de Nice Sophia-Antipolis, France,Centre national de la recherche scientifique (CNRS)
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- Frieswijk, W. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Garrett, M. A. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; Leiden University, The Netherlands,Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam,Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
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- Grießmeier, J. (författare)
- LPC2E – Université d’Orléans/CNRS, France ; Univ. Orléans, France,Universite d'Orleans,University of Orléans
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- Gunst, A. W. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Hamaker, J. P. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Rijksuniversiteit Groningen,University of Groningen,University of Groningen, The Netherlands
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- Hassall, T. E. (författare)
- University of Southampton, UK
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- Heald, G. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Hoeft, M. (författare)
- Thüringer Landessternwarte, Germany,Thüringer Landessternwarte Tautenburg,Netherlands Institute for Radio Astronomy (ASTRON),ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Juette, E. (författare)
- Astronomisches Institut der Ruhr-Universität Bochum, Germany
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- Karastergiou, A. (författare)
- University of Oxford, UK
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- Kondratiev, V. I. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Astro Space Center of Lebedev Physical Institute
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- Kramer, M. (författare)
- Max-Planck-Institut für Radioastronomie, Germany ; The University of Manchester, UK,University of Manchester,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy
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- Kuniyoshi, M. (författare)
- Max-Planck-Institut für Radioastronomie, Germany,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy
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- Kuper, G. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Maat, P. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Observatoire de Lyon,Lyon Observatory,Observatoire de Lyon, France
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- Mann, G. (författare)
- Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
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- Markoff, S. (författare)
- University of Amsterdam, The Netherlands,Universiteit Van Amsterdam,Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam,Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
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- McFadden, R. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- McKay-Bukowski, D. (författare)
- University of Oulu, Finland ; STFC Rutherford Appleton Laboratory, UK,Oulun Yliopisto,STFC Rutherford Appleton Laboratory
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- Morganti, R. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands ; Kapteyn Astronomical Institute, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Munk, H. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Norden, M. J. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Offringa, A. R. (författare)
- Australian National University, Australia
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- Orru, E. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Paas, H. (författare)
- University of Groningen, The Netherlands
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- Pandey-Pommier, M. (författare)
- Observatoire de Lyon, France
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- Pizzo, R. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Polatidis, A. G. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands
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- Reich, W. (författare)
- Max-Planck-Institut für Radioastronomie, Germany,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy,Harvard-Smithsonian Center for Astrophysics,Harvard-Smithsonian Center for Astrophysics, USA
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- Röttgering, H. (författare)
- Leiden University, The Netherlands
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- Rowlinson, A. (författare)
- CSIRO Australia Telescope National Facility, Australia
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- Scaife, A. M. M. (författare)
- University of Oxford, UK
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- Schwarz, D. (författare)
- Universität Bielefeld, Germany
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- Sluman, J. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Smirnov, O. (författare)
- Rhodes University, South Africa
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- Stappers, B. W. (författare)
- The University of Manchester, UK,University of Manchester,Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy,Max Planck Institute for Astrophysics, Germany
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- Steinmetz, M. (författare)
- Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
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- Tagger, M. (författare)
- LPC2E – Université d’Orléans/CNRS, France,Universite d'Orleans,University of Orléans
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- Tang, Y. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Tasse, C. (författare)
- Observatoire de Paris, France,Universität Bielefeld,Bielefeld University
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- Thoudam, Satyendra (författare)
- Radboud University Nijmegen, The Netherlands,Radboud Universiteit,Radboud University
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- Toribio, M. C. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Vermeulen, R. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Vocks, C. (författare)
- Leibniz-Institut für Astrophysik Potsdam (AIP), Germany,Leibniz-Institut Für Astrophysik Potsdam,Leibniz Institute for Astrophysics Potsdam
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- van Weeren, R. J. (författare)
- Harvard-Smithsonian Center for Astrophysics, USA
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- White, S. (författare)
- Max Planck Institute for Astrophysics, Germany
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- Wise, M. W. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, Germany ; University of Amsterdam, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Van Amsterdam,University of Amsterdam
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- Yatawatta, S. (författare)
- ASTRON, the Netherlands Institute for Radio Astronomy, The Netherlands,Netherlands Institute for Radio Astronomy (ASTRON)
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- Zensus, A. (författare)
- Max-Planck-Institut für Radioastronomie, Germany
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(creator_code:org_t)
- 2015-01-28
- 2015
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 574
- Relaterad länk:
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https://www.aanda.or...
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http://publications.... (primary) (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Aims. An efficient means of locating calibrator sources for international LOw Frequency ARray (LOFAR) is developed and used to determine the average density of usable calibrator sources on the sky for subarcsecond observations at 140 MHz.Methods. We used the multi-beaming capability of LOFAR to conduct a fast and computationally inexpensive survey with the full international LOFAR array. Sources were preselected on the basis of 325 MHz arcminute-scale flux density using existing catalogues. By observing 30 different sources in each of the 12 sets of pointings per hour, we were able to inspect 630 sources in two hours to determine if they possess a sufficiently bright compact component to be usable as LOFAR delay calibrators.Results. More than 40% of the observed sources are detected on multiple baselines between international stations and 86 are classified as satisfactory calibrators. We show that a flat low-frequency spectrum (from 74 to 325 MHz) is the best predictor of compactness at 140 MHz. We extrapolate from our sample to show that the sky density of calibrators that are sufficiently bright to calibrate dispersive and non-dispersive delays for the international LOFAR using existing methods is 1.0 per square degree.Conclusions. The observed density of satisfactory delay calibrator sources means that observations with international LOFAR should be possible at virtually any point in the sky provided that a fast and efficient search, using the methodology described here, is conducted prior to the observation to identify the best calibrator.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- instrumentation
- high angular resolution
- interferometers
- methods
- observational
- techniques
- interferometric
- high angular resolution
- catalogs
- Astroparticle Physics
- Astropartikelfysik
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- ref (ämneskategori)
- art (ämneskategori)
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Moldón, J.
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Deller, A. T.
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Wucknitz, O.
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Jackson, N.
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Drabent, A.
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Carozzi, Tobia, ...
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visa fler...
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Conway, John, 19 ...
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Kapinska, A. D.
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McKean, J. P.
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Morabito, L.
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Varenius, Eskil, ...
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Zarka, P.
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Anderson, J.
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Asgekar, A.
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Avruch, I. M.
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Bell, M. E.
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Bentum, M. J.
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Bernardi, G.
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Best, P.
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Bîrzan, L.
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Bregman, J.
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Breitling, F.
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Broderick, J. W.
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Brüggen, M.
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Butcher, H. R.
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Carbone, D.
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Ciardi, B.
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de Gasperin, F.
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de Geus, E.
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Duscha, S.
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Eislöffel, J.
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Engels, D.
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Falcke, H.
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Fallows, R. A.
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Fender, R.
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Ferrari, C.
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Frieswijk, W.
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Garrett, M. A.
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Grießmeier, J.
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Gunst, A. W.
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Hamaker, J. P.
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Hassall, T. E.
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Heald, G.
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Hoeft, M.
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Juette, E.
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Karastergiou, A.
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Kondratiev, V. I ...
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Kramer, M.
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Kuniyoshi, M.
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Kuper, G.
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Maat, P.
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Mann, G.
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Markoff, S.
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McFadden, R.
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McKay-Bukowski, ...
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Morganti, R.
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Munk, H.
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Norden, M. J.
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Offringa, A. R.
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Orru, E.
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Paas, H.
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Pandey-Pommier, ...
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Pizzo, R.
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Polatidis, A. G.
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Reich, W.
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Röttgering, H.
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Rowlinson, A.
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Scaife, A. M. M.
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Schwarz, D.
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Sluman, J.
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Smirnov, O.
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Stappers, B. W.
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Steinmetz, M.
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Tagger, M.
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Tang, Y.
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Tasse, C.
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Thoudam, Satyend ...
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Toribio, M. C.
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Vermeulen, R.
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Vocks, C.
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van Weeren, R. J ...
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White, S.
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Wise, M. W.
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Yatawatta, S.
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Zensus, A.
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