Information: - Mullard Radio Astronomy Observatory (MRAO) is home to a number of large aperture synthesis radio telescopes, including the One-Mile Telescope, 5-km Ryle Telescope, and the Arcminute Microkelvin Imager. - The Fourth Cambridge Survey ( 4C ) is an astronomical catalogue of celestial radio sources as measured at 178 MHz using the 4C Array . It was published in two parts , in 1965 ( for declinations +20 to +40 ) and 1967 ( declinations -7 to + 20 and +40 to +80 ) , by the Radio Astronomy Group of the University of Cambridge . References to entries in this catalogue use the prefix 4C followed by the declination in degrees , followed by a period , and then followed by the source number on that declination strip , e.g. 4C - 06.23 . The 4C Array , which used the technique of aperture synthesis , could reliably position sources with flux densities of around 2 Jy , to within about 0.35 arcmin in Right ascension and 2.5 arcmin in declination . - The Equator usually refers to an imaginary line on the Earth's surface equidistant from the North Pole and South Pole, dividing the Earth into the Northern Hemisphere and Southern Hemisphere. The Equator is about long; some 78.7% lies across water and 21.3% over land. - The 4C Array is a cylindrical paraboloid radio telescope at the Mullard Radio Astronomy Observatory, near Cambridge, England. It is similar in design to the Molonglo Observatory Synthesis Telescope. It is 450 m long, 20 m wide, with a second, moveable element (now mostly removed; some of it is still visible, beyond COAST). The first large aperture synthesis telescope (1958), it was also the first new instrument to be built at Lord's Bridge, after the Observatory was moved there in 1957, and needed of reflector wire (since removed). The 4C operated at 178MHz (1.7 m), and located nearly 5000 sources of the 4C (4th Cambridge) catalogue published in 1965 and 1966, which helped establish the evolution of the radio galaxy population of the universe. The telescope is now inoperable. - In astronomy and celestial navigation, the hour angle is one of the coordinates used in the equatorial coordinate system to give the direction of a point on the celestial sphere. The hour angle of a point is the angle between two planes: one containing the Earth's axis and the zenith (the meridian plane), and the other containing the Earth's axis and the given point (the hour circle passing through the point). - In astronomy, declination (abbreviated dec; symbol ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. Declination's angle is measured north or south of the celestial equator, along the hour circle passing through the point in question. - In astronomy, the hour circle of a celestial object is the great circle through the object and the celestial poles. It is perpendicular to the celestial equator. The declination of an object as observed on the celestial sphere is the angle measured along the hour circle of that object to the celestial equator. In other words, it is analogous to meridians or longitudes on a globe. A meridian on the celestial sphere matches an hour circle at any time. So called because the angle between the planes of the hour circles (or the difference in longitudes) of two objects is sometimes measured in hours (or hours, minutes, and seconds), one revolution (360) being equivalent to 24 hours, or 1 hour being equivalent to 15. Given the information above, choose from the list below the object entity that exhibits the relation 'operator' with the subject 'fourth cambridge survey'. Choices: - meridian - mullard radio astronomy observatory - southern
mullard radio astronomy observatory
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Information: - Charing Cross denotes the junction of Strand, Whitehall and Cockspur Street, just south of Trafalgar Square in central London. It gives its name to several landmarks, including Charing Cross railway station, one of the main London rail terminals. - Battersea Park is a 200acre (83-hectare) green space at Battersea in the London Borough of Wandsworth in London. It is situated on the south bank of the River Thames opposite Chelsea, and was opened in 1858. - The London Borough of Wandsworth is a London borough in England, and forms part of Inner London. The local authority is Wandsworth London Borough Council. - Battersea is a largely residential inner-city district of south London in the London Borough of Wandsworth, England. It has Battersea Park, one of southwest London's main parks, and is on the south side of the River Thames, 2.9 miles (4.8km) south-west of Charing Cross. - Up the Junction is a 1963 collection of short stories by Nell Dunn that depicts contemporary life in the industrial slums of Battersea and Clapham Junction . The book uses colloquial speech , and its portrayal of petty thieving , sexual encounters , births , deaths and back - street abortion provided a view of life that was previously unrecognised by many people . The book won the 1963 John Llewellyn Rhys Memorial Prize . - Wandsworth is a district of south-west London within the London Borough of Wandsworth. It is situated southwest of Charing Cross. The area is identified in the London Plan as one of 35 major centres in Greater London. - South London is the southern part of London, England. - The River Thames is a river that flows through southern England. At , it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. It also flows through Oxford (where it is called Isis), Reading, Henley-on-Thames and Windsor. The lower reaches of the river are called the Tideway, derived from its long tidal reach up to Teddington Lock. It rises at Thames Head in Gloucestershire, and flows into the North Sea via the Thames Estuary. The Thames drains the whole of Greater London. Given the information above, choose from the list below the object entity that exhibits the relation 'narrative location' with the subject 'up the junction'. Choices: - england - london - oxford - river thames
london
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