The Cosmic Lens All-Sky Survey - I. Source selection and observations
| العنوان: | The Cosmic Lens All-Sky Survey - I. Source selection and observations |
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| المؤلفون: | D. Rusin, P. M. Phillips, Steven T. Myers, Christopher D. Fassnacht, A. D. Biggs, John McKean, Neal Jackson, A. C. S. Readhead, A. G. de Bruyn, Léon V. E. Koopmans, C. M. Sykes, M. A. Norbury, T. J. Pearson, Martin C. Shepherd, Peter N. Wilkinson, D. R. Marlow, Iwa Browne, Roger Blandford |
| المساهمون: | Kapteyn Astronomical Institute, Astronomy |
| المصدر: | Monthly Notices of the Royal Astronomical Society, 341(1), 1-12. Oxford University Press |
| بيانات النشر: | Oxford University Press (OUP), 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | RADIO-SOURCES, media_common.quotation_subject, gravitational lensing, B1608+656, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Cosmological constant, REDSHIFTS, 01 natural sciences, law.invention, B2114+022, B1152+199, law, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, SPECTRUM, COSMIC cancer database, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astronomy and Astrophysics, Galaxy, GALAXY, Lens (optics), cosmology : observations, Gravitational lens, 13. Climate action, Space and Planetary Science, Sky, 4-IMAGE GRAVITATIONAL LENS, Dark energy, PHASE CALIBRATION SOURCES, SYSTEM, Quintessence |
| الوصف: | The Cosmic Lens All-Sky Survey (CLASS) is an international collaborative program which has obtained high-resolution radio images of over 10000 flat-spectrum radio sources in order to create the largest and best studied statistical sample of radio-loud gravitationally lensed systems. With this survey, combined with detailed studies of the lenses found therein, constraints can be placed on the expansion rate, matter density, and dark energy (e.g. cosmological constant, quintessence) content of the Universe that are complementary to and independent of those obtained through other methods. CLASS is aimed at identifying lenses where multiple images are formed from compact flat-spectrum radio sources, which should be easily identifiable in the radio maps. Because CLASS is radio-based, dust obscuration in lensing galaxies is not a factor, and the relative insensitivity of the instrument to environmental conditions leads to nearly uniform sensitivity and resolution over the entire survey. In four observing seasons from 1994-1999, CLASS has observed 13783 radio sources with the VLA at 8.4 GHz at 0.2 arcsecond resolution. When combined with the JVAS survey, the CLASS sample contains over 16,000 images. A complete sample of 11685 flat-spectrum sources was observed, selected from GB6 catalogue at 4.85 GHz and the NVSS at 1.4 GHz. So far, CLASS has found 16 new gravitational lens systems, and the JVAS/CLASS survey contains a total of 22 lenses. (Abridged) 14 pages, 9 figures, accepted for publication in MNRAS |
| وصف الملف: | application/pdf |
| تدمد: | 1365-2966 0035-8711 |
| DOI: | 10.1046/j.1365-8711.2003.06256.x |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::517beacf53677e0f00ba84703d962f92 https://doi.org/10.1046/j.1365-8711.2003.06256.x |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....517beacf53677e0f00ba84703d962f92 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
|---|---|
| DOI: | 10.1046/j.1365-8711.2003.06256.x |