Pierre Léna is emeritus professor of physics and astrophysics at the university of Paris Diderot-Paris 7 and researcher at the Observatoire de Paris.

Daniel Rouan is a director of research of the Centre National de la Recherche Scientific (CNRS) at the Observatoire de Paris. He specialises in very high resolution imaging and develops new optical concepts for observation of exoplanets.

François Lebrun is an engineer at the Commissariat à l'énergie atomique. He has participated in major space astronomy missions, notably INTEGRAL. YOU COULD SAY ... an engineer at the French atomic energy authority (CEA).

François Mignard is a director of research of the Centre National de la Recherche Scientific (CNRS) at the Observatoire de la Côte d'Azur. He specialises in astrometry and has played a major role in the future European space mission GAIA.

Didier Pelat is an astronomer at the Observatoire de Paris. He teaches signal and image processing and has developed powerful mathematical tools for astronomical data processing.

Enlarged and revised 3rd edition of a successful adopted textbook

With a clear part and chapter structure for easier access for students

Covers observational astrophysics over the entire electromagnetic spectrum

Touches upon new and future windows of astronomy: neutrinos and gravitational waves

Offers basics of signal processing, beneficial use of astronomical databases and virtual observatories

Includes supplementary material: [...]

Part I Foundations.- 1 Astrophysical Information.- 2 The Earth Atmosphere and Space.- 3 Radiation and Photometry.- 4 Space-Time Reference Frames.- Part II Data Collection.- 5 Telescopes and Images.- 6 Diffraction and Image Formation.- 7 Detectors.- 8 Spectral Analysis.- Part III Data Analysis.- 9 The Signal in Astronomy.- 10 Sky Surveys and Virtual Observatories.- A Fourier Transforms.- B Random Processes and Variables.- C Physical and Astronomical Constants.- D Tables of Space Missions.- E Webography.- F Acronyms.- Bibliography.- Index.