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Faint Images of the Radio Sky at Twenty-Centimeters

Index Faint Images of the Radio Sky at Twenty-Centimeters

Faint Images of the Radio Sky at Twenty-Centimeters, or FIRST, was an astronomical survey of the Northern Hemisphere carried out by the Very Large Array. [1]

26 relations: Active galactic nucleus, Angular resolution, Astronomical Image Processing System, Astronomical survey, Correlation function (astronomy), Dark matter, David Helfand, Fanaroff-Riley classification, Galactic astronomy, Galactic coordinate system, Galaxy formation and evolution, Grote Reber, International Astronomical Union, Jansky, Minute and second of arc, National Geographic Society – Palomar Observatory Sky Survey, Northern Hemisphere, NRAO VLA Sky Survey, Observable universe, Pulsar, Quasar, Root mean square, Sloan Digital Sky Survey, Square degree, Very Large Array, 2MASS.

Active galactic nucleus

An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.

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Angular resolution

Angular resolution or spatial resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.

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Astronomical Image Processing System

The Astronomical Image Processing System (AIPS) is a software package to support the reduction and analysis of data taken with radio telescopes.

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Astronomical survey

An astronomical survey is a general map or image of a region of the sky which lacks a specific observational target.

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Correlation function (astronomy)

In astronomy, a correlation function describes the distribution of galaxies in the universe.

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Dark matter

Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.

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David Helfand

David J. Helfand is a U.S. astronomer who served as president of Quest University Canada from 2008-2015.

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Fanaroff-Riley classification

The Fanaroff-Riley classification is a scheme created by B.L. Fanaroff and J.M. Riley in 1974, which is used to distinguish radio galaxies with active nuclei based on their radio luminosity or brightness of their radio emissions in relation to their hosting environment.

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Galactic astronomy

Galactic astronomy is the study of the Milky Way galaxy and all its contents.

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Galactic coordinate system

The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.

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Galaxy formation and evolution

The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.

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Grote Reber

Grote Reber (December 22, 1911 – December 20, 2002) was a pioneer of radio astronomy, which combined his interests in amateur radio and amateur astronomy.

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International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

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Jansky

The jansky (symbol Jy) is a non-SI unit of spectral flux density, or spectral irradiance, used especially in radio astronomy.

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Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

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National Geographic Society – Palomar Observatory Sky Survey

The National Geographic Society – Palomar Observatory Sky Survey (NGS-POSS) was a major astronomical survey, that took almost 2,000 photographic plates of the night sky.

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Northern Hemisphere

The Northern Hemisphere is the half of Earth that is north of the Equator.

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NRAO VLA Sky Survey

The NRAO VLA Sky Survey (NVSS) was an astronomical survey of the Northern Hemisphere carried out by the Very Large Array (VLA) of the National Radio Astronomy Observatory (NRAO), resulting in an astronomical catalogue.

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Observable universe

The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.

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Pulsar

A pulsar (from pulse and -ar as in quasar) is a highly magnetized rotating neutron star or white dwarf that emits a beam of electromagnetic radiation.

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Quasar

A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).

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Root mean square

In statistics and its applications, the root mean square (abbreviated RMS or rms) is defined as the square root of the mean square (the arithmetic mean of the squares of a set of numbers).

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Sloan Digital Sky Survey

The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States.

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Square degree

A square degree (deg2) is a non-SI-compliant unit measure of solid angle.

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Very Large Array

The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory located in central New Mexico on the Plains of San Agustin, between the towns of Magdalena and Datil, ~50 miles (80 km) west of Socorro.

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2MASS

The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in the infrared spectrum and one of the most ambitious such projects.

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References

[1] https://en.wikipedia.org/wiki/Faint_Images_of_the_Radio_Sky_at_Twenty-Centimeters

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