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The Radio Sky II: Observational Radio Astronomy

This course covers the principles and practices of radio astronomical observations, in particular with modern interferometers. Topics range from radio telescope technology to the measurement equation to radio interferometric calibration and imaging.

Hay una sesión disponible:

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Comienza el 1 oct
Termina el 19 nov
7 semanas estimadas
6–7 horas por semana
Al ritmo del instructor
Dictado por un instructor según un cronograma
Gratis
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Sobre este curso

Omitir Sobre este curso

The first part of the course introduces the different types of telescope technologies available to astronomers, with a particular focus on single-dish radio telescopes and radio interferometers. Optical, UV, X-ray, Gamma, neutrino, and gravitational wave telescopes will also be briefly covered, as well as a foray into Search for Extraterrestrial Intelligence.

We, then, dive deep into the principles of observational radio astronomy, covering the observables (flux, luminosity, brightness temperature), and the instrumentation (the radiometer equation, sensitivity calculations). Next, we describe various radio telescope technologies, as well as time-domain radio astronomy (pulsars, transients, Fast Radio Bursts). Finally, we look at different radio astronomy observatories around the world and compare their capabilities.

The rest of the course is dedicated to radio interferometric imaging. We introduce the Fourier transform and the van Cittert-Zernike theorem, and discuss the principles of aperture synthesis imaging (visibilities, sampling, point spread functions, deconvolution). We drill down into the radio-interferometer measurement equation (RIME), and use that to derive the principles of interferometric calibration and self-calibration. We also look at practical data reduction techniques, covering data inspection, flagging, basic calibration, and imaging, as well as the practical details of writing observational proposals.

The course includes a discussion of the future Square Kilometre Array radio telescope, its challenges, and projected scientific capabilities.

De un vistazo

  • Institución: EPFLx
  • Tema:Física
  • Nivel:Advanced
  • Prerrequisitos:
    • Undergraduate: algebra, basic mathematics, and physics concepts
    • Basic computer science
    • MOOC: The Radio Sky I
  • Idioma:English
  • Transcripción de video:English

Lo que aprenderás

Omitir Lo que aprenderás
  • Types of telescopes across the electromagnetic spectrum
  • Single-dish radio telescopes and radio interferometers
  • Basics of neutrino and gravitational wave astronomy
  • Basics of the Search for Extraterrestrial Intelligence
  • Fundamental radio astronomy observables
  • Principles of radio telescopes, radiometer equation
  • Diversity of radio telescope technologies and observatories
  • Observing pulsars, transients, and other time-domain radio astronomy
  • Principles of aperture synthesis imaging; Fourier theory
  • Visibility function, sampling, PSF, deconvolution
  • The radio interferometer measurement equation (RIME)
  • Calibration and self-calibration of radio interferometers
  • Practical data reduction, calibration, and imaging
  • Developing observational proposals for radio observatories

Plan de estudios

Omitir Plan de estudios
  • Week 1: Study of the telescope technology, focusing on optical and radio telescopes - first part.
  • Week 2: Study of the telescope technology, focusing on optical and radio telescopes - second part.
  • Week 3: Introduction to observational radio astronomy, analyzing the main units of measure and the radio telescope principles.
  • Week 4: Presentation of the ground rules of imaging using an interferometric array. Study of the Fourier transform, the sampling, and the van Cittert Zernike theorem.
  • Week 5: Examination of the cycle of radio interferometric data, from visibilities to images - first part.
  • Week 6: Examination of the cycle of radio interferometric data, from visibilities to images - second part.

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¿Quién puede hacer este curso?

Lamentablemente, las personas residentes en uno o más de los siguientes países o regiones no podrán registrarse para este curso: Irán, Cuba y la región de Crimea en Ucrania. Si bien edX consiguió licencias de la Oficina de Control de Activos Extranjeros de los EE. UU. (U.S. Office of Foreign Assets Control, OFAC) para ofrecer nuestros cursos a personas en estos países y regiones, las licencias que hemos recibido no son lo suficientemente amplias como para permitirnos dictar este curso en todas las ubicaciones. edX lamenta profundamente que las sanciones estadounidenses impidan que ofrezcamos todos nuestros cursos a cualquier persona, sin importar dónde viva.

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