X-ray Binary
An X-ray binary is a close binary system where a neutron star (or more rarely a black hole) is accreting matter from what is usually a main sequence star.
X-ray astronomy
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X-ray
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X-ray outburst observed by school children
KEITH COOPER
ASTRONOMY NOW
Posted: 20 April 2011 ...
X-ray astronomy
X-ray astronomy is an observational branch of astronomy, which deals with the study of X-ray emission from celestial objects.
X-ray transients seem to divide themselves naturally into 2 classes: those associated with High Mass X-ray Binaries and those associated with Low Mass X-ray Binaries.
X-ray diffraction
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Lord Kelvin on X-rays ...
Definition: X-ray: Light that is so blue humans cannot see it. A band of the spectrum between the ultraviolet and the gamma-ray.
Operational until 1999, it was instrumental in the discovery of X-ray emissions from comets and conducted an all-sky survey in the X-ray region of the spectrum. Five other satellites launched in the 1990s are still operational.
X-ray binary
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X-ray binaries are a class of binary stars that are very luminous in X-rays.
Be X-ray binaries
Be X-ray binaries are a class of High-mass X-ray binaries that consist of a Be star and a neutron star. The neutron star is usually in a wide highly elliptical orbit around the Be star.
Gamma Ray Bursts - The Most Powerful Objects in the Universe?
The locations of all 2704 Gamma Ray Bursts detected by BATSE in the 9 year mission.
Click on image for full size
NASA, Compton Gamma Ray Observatory, BATSE Team ...
Gamma Ray Bursts
Gamma ray bursts (GRBs) are short-lived flares of gamma rays originating from deep space. They were discovered accidentally in the 1960s and since then have been the target of intense research and speculation by astronomers.
Gamma-Ray Bursts
Many of the same considerations applicable to relativistic jets in AGN also seem to apply to gamma-ray bursts and their afterglows.
Ray Structure
An example of the ray structure of was captured on March 19, 1986, at the Mount Wilson/Las Campanas Observatories. This 10-minute exposure was recorded at the focus of the 100-inch telescope on Las Campanas in Chile.
Gamma Ray Burster
Gamma ray bursts were first detected by U. S. military Vela satellites launched in 1963 to monitor Soviet compliance with the nuclear test ban treaty.
Chandra X-ray Observatory
Chandra is solar powered and has three major parts. The X-ray telescope contains eight mirrors that focus the X-rays emitted by space objects.
Chandra X-ray Observatory
The Chandra Telescope is in orbit around Earth. Image Credit: NASA
a powerful X-ray telescope ...
anomalous X-ray pulsar (AXP)
A type of X-ray pulsar with a very long axial rotation period (for a pulsar), of 6 to 12 seconds, combined with a very powerful X-ray emission that cannot be explained by such a low spin rate.
ray: a single line or narrow beam of light.
reclination: a term sometimes used for the angle by which a reclining dial leans away from the observer (i.e. the complement of the inclination).
Ray Douglas Bradbury is an United States literature, fantasy, Horror fiction, science fiction, and mystery writer.
Ray Tracing
Computer simulation of light ray paths through an optical system.
Rayleigh ...
Ray
Ejecta from meteorite impacts forming white streamers radiating from some lunar craters.
Recombination ...
Ray: Streak of material blasted out and away from an impact crater.
Recovery: In astronomy, the first time a periodic comet is observed on its inbound journey toward perihelion. In meteoritics, the collection of a meteorite after its fall.
-Ray
A recoil electron ejected from an atom by an energetic charged particle. Delta-rays appear as branches in the main track of a cloud chamber. [H76]
Demagnetization ...
X-RAY BURSTS - Bursts of X-ray energy that occur in low-mass X-ray binary systems in which a neutron star and low-mass main sequence star are in orbit around one another.
X-RAY SOURCES
The late 1970s saw several important discoveries about neutron stars in binary-star systems. Numerous X-ray sources were discovered near the central regions of our galaxy and also near the centers of a few rich star clusters.
X-ray Astronomy High-Energy Universe Advanced X-Ray Astrophysics Facility Science Center
Supernovas Goddard Space Flight Center Laboratory for High Energy Astrophysics ...
X-ray Burst. A temporary enhancement of the X-ray emission of the Sun. The time-intensity profile of soft X-ray bursts is similar to that of the H-alpha profile of an associated flare.
X-ray source- a region of extremely hot gas; matter torn away from a normal star by a black hole or a neutron star becomes violently heated and emits x rays ...
X-ray -- Electromagnetic radiation in the neighborhood of 100 picometer wavelength.
Y -- Yotta, a multiplier, x1024 from the second-to-last letter of the Latin alphabet. See the entry for CGPM.
X-ray
Electromagnetic radiation of very short wavelength and very high-energy; X-rays have shorter wavelengths than ultraviolet light but longer wavelengths than cosmic rays.
XRONOS
Temporal analysis program in XANADU ...
X Ray - The part of the electromagnetic spectrum with wavelengths longer than gamma rays but shorter than ultraviolet ...
X-RAY BINARY
A binary star that is a strong X-ray source. The binaries are thought to contain a neutron star or black hole as one component, and the X-rays to originate from material accreting onto the compact object from its companion.
X Ray Astrophysics Facility (NASA Thesaurus) Free-flying x ray observatory that is shuttle-launched, maintainable in orbit, and retrievable. Used for Advanced X Ray Astrophysics Facility and AXAF.
X-ray emission from northern aurora observed by the Polar Satellite (Ref) ...
X-ray Satellites
There have been many satellites in the past that were x-ray missions, including Uhura (1970), Einstein (1978) and ROSAT (1990's).
The X-Ray Corona
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The corona shines brightly in x-rays because of its high temperature. On the other hand, the "cool" solar photosphere emits very few x-rays.
Gamma-ray burst (GRB)
Gamma ray bursts are short and intense flashes of gamma rays, lasting from milliseconds up to several minutes, followed by a longer lasting afterglow.
gamma-ray burst
a short, intense burst of high-energy radiation emanating from the distant universe
gas giant ...
gamma ray: a very high energy photon, more energetic than an X-ray.
Gyr: gigayear, or one billion years. See for a table of all the metric prefixes from yocto (10-24) to yotta (1024).
Gamma-ray Burst: Among the most powerful events in the Universe, a gamma-ray burst is believed to be the extremely powerful energy discharge of a black hole forming from the death of a giant star.
Gamma ray bursts--brief bursts of gamma rays from the distant universe, observed by satellites.
Gamma rays--electromagnetic waves of the highest frequencies known, originally discovered as an emission of radioactive substances.
gamma-ray burst
A random burst of energy from distant objects in the form of gamma rays. Gamma-ray bursts release an enormous amount of energy and are not clearly understood.
Gamma Ray Bursts - In terms of gamma rays, a Magnetar (a type of neutron star) called SGR 1806-20, had an extreme burst on 27 December 2004.
gamma-ray radiation
The most energetic wavelength, or frequency, of light that is known. Gamma-rays have wavelengths smaller than 10^-11 meters and in frequencies larger than 10^20 Hz.
GAMMA RAY BURST
Gamma ray bursts are mysterious and powerful astronomical phenomenon that emit short-lived flashes of gamma rays (extremely high-energy radiation).
ray - (n.)
(a) A light ray, a wave of electromagnetic radiation; (b) on the surface of a moon or planet, a streak of material that is relatively light in shade, presumable representing material ejected when a crater was formed.
recombination - (n.) ...
X-RAY BINARY STAR
X-ray binary stars are a special type of binary star in which one of the stars is a collapsed object such as a white dwarf, neutron star, or black hole.
X-ray burster X-ray source that radiates thousands of times more energy than our Sun, in short bursts that last only a few seconds.
X-ray emission from stellar coronal material has been observed around Stars B and C with the Chandra X-Ray Observatory (press release; Brickhouse et al, 2001; and Nikolic et al, 1997; among others).
X-ray doubles
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X-ray Eyes on Tempel
This false-color image shows comet Tempel 1 as seen by Chandra X-ray Observatory on June 30, 2005, Universal Time. The comet was bright and condensed.
X-ray telescope
A special telescope used to detect X-rays - high-energy electromagnetic radiation. The high energy of X-rays means they will go through rather than bounce off a "normal" telescope mirror.
X-ray Burster: A semidetached binary system where matter is accreting onto a neutron star. As hydrogen accretes onto a neutron star (possibly producing a variable X-ray source) the hydrogen is promptly burned into helium.
x-ray
Radiation of extremely short wavelength (generally less than 1 nm).
A daily average background x-ray flux in the 0.1 to 0.8 nm range. It is a midday minimum given in terms of x-ray flare class.
by Ray Newburn, Jr., Jet Propulsion Laboratory
For a period of about six days centered on July 19, 1994, fragments of Comet Shoemaker-Levy 9 are expected to collide with Jupiter, the solar system's largest planet.
As a ray of light passes across a surface from one medium to another (for example, from air to glass), its direction is changed--a phenomenon known as refraction.
The X-ray glow of million-degree gas fills the Coma Cluster of galaxies in this image from the ROSAT satellite. The gas is thicker at the center of the cluster. Some of the galaxies are visible as small red or orange points in the image.
The X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) of the space telescope XMM-Newton is the best obtained so far of such a system. It reveals unprecedented details of its gaseous environment.
 See also: X-ray, Energy, Light, Earth, Universe
  
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