X ray transients

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• X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

• X-ray binary — Artist s impression of an X ray Binary X ray binaries are a class of binary stars that are luminous in X rays. The X rays are produced by matter falling from one component, called the donor (usually a relatively normal star) to the other… …   Wikipedia

• Soft X-ray transient — Soft X ray transients (often abbreviated to SXT) are also known as X ray novae . Typical SXTs are usually very faint, or even unobservable, in X rays and their apparent magnitude in the optical wavelengths is about 20. This is called the… …   Wikipedia

• Gamma Ray Burst Coordinates Network — The Gamma Ray Burst Coordinates Network (GCN) is a system that distributes information about the location of a Gamma ray burst (GRB), called Notices , when a burst is detected by various spacecraft. The GCN also automatically receives and… …   Wikipedia

• Array of Low Energy X-ray Imaging Sensors — The Array of Low Energy X ray Imaging Sensors (ALEXIS) X ray telescopes feature curved mirrors whose multilayer coatings reflect and focus low energy X rays or extreme ultraviolet light the way optical telescopes focus visible light. The… …   Wikipedia

• Fermi Gamma-ray Space Telescope — Infobox Space telescope name = Fermi Gamma ray Space Telescope (GLAST) caption = Artist s conception of the GLAST satellite organization = NASA, the United States Department of Energy, and government agencies in France, Germany, Italy, Japan, and …   Wikipedia

• Röntgendoppelstern — Künstlerische Darstellung eines Röntgendoppelsterns mit Akkretionsscheibe und Jet Ein Röntgendoppelstern ist ein Doppelsternsystem, das Röntgenstrahlung abstrahlt aufgrund der Umwandlung von potentieller Energie in elektromagnetische Strahlung.… …   Deutsch Wikipedia

• Black hole — For other uses, see Black hole (disambiguation). Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitat …   Wikipedia

• Pair-instability supernova — A pair instability supernova occurs when pair production, the production of free electrons and positrons in the collision between atomic nuclei and energetic gamma rays, reduces thermal pressure inside a supermassive star s core. This pressure… …   Wikipedia

• Metallicity — The globular cluster M80. Stars in globular clusters are mainly older metal poor members of Population II. In astronomy and physical cosmology, the metallicity (also called Z[1]) of an object is the proportion of its matter made …   Wikipedia

• Corona — This article is about the astronomical term. For other uses, see Corona (disambiguation). During a total solar eclipse, the solar corona can be seen with the naked eye. A corona is a type of plasma atmosphere of the Sun or other celestial body,… …   Wikipedia