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European Pulsar Timing Array
The European Pulsar Timing Array (EPTA) is a European collaboration to combine five 100-m class radio-telescopes to observe an array of pulsars with the specific goal of detecting gravitational waves. It is one of three pulsar timing array projects in operation, the others being the Parkes Pulsar Timing Array and the North American Nanohertz Observatory for Gravitational Waves. Pulsars and high-precision timing Pulsars are rapidly rotating, highly magnetised neutron stars that emit radio waves from their magnetic poles that are, due to the star's rotation, observed on Earth as a string of pulses. Due to the extremely high density of neutron stars, their rotation periods are very stable, hence the observed arrival time of the pulses are highly regular. These arrival times are called TOAs (time of arrival) and can be used to perform high-precision timing experiments. The stability of the TOAs from most pulsars is limited due to the presence of red noise, also called "timing noi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EPTA Logo
{{Disambiguation ...
EPTA may refer to: * European Parliamentary Technology Assessment * European Pulsar Timing Array * Phosphotungstic acid * Expanded Programme of Technical Assistance, a United Nations aid network * European Piano Teachers Association European, or Europeans, or Europeneans, may refer to: In general * ''European'', an adjective referring to something of, from, or related to Europe ** Ethnic groups in Europe ** Demographics of Europe ** European cuisine, the cuisines of Europe a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Pulsar Timing Array
The International Pulsar Timing Array (IPTA) is a multi-institutional, multi-telescope collaboration comprising the European Pulsar Timing Array (EPTA), the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), the Parkes Pulsar Timing Array (PPTA) in Australia, and thIndian Pulsar Timing Array Project(InPTA). The goal of the IPTA is to detect ultra-low-frequency gravitational waves, such as from mergers of supermassive black holes, using an array of approximately 30 pulsars. This goal is shared by each of the participating institutions, but they have all recognized that their goal will be achieved more quickly by combining their respective efforts and resources. Overview The basic experiment exploits the predictability of the times of arrival (TOAs) of pulses from millisecond pulsars (MSPs) and uses them as a system of galactic clocks. Disturbances in the clocks will be measurable at the Earth. A disturbance from a passing gravitational wave will have a particu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomy In Europe
Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole. Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Babylonians, Greeks, Indians, Egyptians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars. Nowad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Instruments
Astronomical instruments include: *Alidade *Armillary sphere * Astrarium *Astrolabe *Astronomical clock *the Antikythera mechanism, an astronomical clock *Blink comparator *Bolometer *the Canterbury Astrolabe Quadrant *Celatone *Celestial sphere *Charge-coupled device * Computers *CMOS sensor *Coronagraph * Cosmolabe *Dioptra * Equatorial ring * Equatorium *Gnomon *Inclinometer *Interferometer * Kamal *Meridian circle * Microchannel plate detector * Mural instrument * Nebra sky disk *Nocturnal * Octant *Optical spectrometer, a.k.a., Spectrograph *Orrery *Photographic plate *Photometer *Planisphere *the Prague astronomical clock * Quadrant *Reticle * Radio plate *Retroreflector * Scaphe *Sextant *Starshade *Space telescope *Spectrometers *Sundial *Telescope * Torquetum * Triquetrum *Zenith telescope See also *Astronomy * Outline of astronomy * Surveying instrument *Measurement instrument {{DEFAULTSORT:Astronomical instruments Instruments Instrument may refer to: Science a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Research Council
The European Research Council (ERC) is a public body for funding of scientific and technological research conducted within the European Union (EU). Established by the European Commission in 2007, the ERC is composed of an independent Scientific Council, its governing body consisting of distinguished researchers, and an Executive Agency, in charge of the implementation. It forms part of the framework programme of the union dedicated to research and innovation, Horizon 2020, preceded by the Seventh Research Framework Programme (FP7). The ERC budget is over €13 billion from 2014 – 2020 and comes from the Horizon 2020 programme, a part of the European Union's budget. Under Horizon 2020 it is estimated that around 7,000 ERC grantees will be funded and 42,000 team members supported, including 11,000 doctoral students and almost 16,000 post-doctoral researchers. Researchers from any field can compete for the grants that support pioneering projects. The ERC competitions are open ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Pulsar Timing Array (logo)
The European Pulsar Timing Array (EPTA) is a European collaboration to combine five 100-m class radio-telescopes to observe an array of pulsars with the specific goal of detecting gravitational waves. It is one of several pulsar timing array projects in operation, and one of the four projects comprising the International Pulsar Timing Array, the others being the Parkes Pulsar Timing Array, the North American Nanohertz Observatory for Gravitational Waves, and the Indian Pulsar Timing Array. Pulsars and high-precision timing Pulsars are rapidly rotating, highly magnetised neutron stars that emit radio waves from their magnetic poles that are, due to the star's rotation, observed on Earth as a string of pulses. Due to the extremely high density of neutron stars, their rotation periods are very stable, hence the observed arrival time of the pulses are highly regular. These arrival times are called TOAs (time of arrival) and can be used to perform high-precision timing experiments. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sardinia Radio Telescope
The Sardinia Radio Telescope (SRT) is 64-metre fully steerable radio telescope near San Basilio, Province of Cagliari, Sardinia, Italy. Completed in 2011, it is a collaboration between the Istituto di Radioastronomia di Bologna, the Cagliari Observatory (Cagliari) and the Arcetri Astrophysical Observatory (Florence). Design The telescope is in Sardinia, north of Cagliari, and is the largest of a set of three telescopes operated by INAF, along with telescopes at the Medicina Radio Observatory and the Noto Radio Observatory. It operates as a stand-alone instrument and as part of global networks of telescopes. The telescope and its structure weighs around . The primary mirror is in diameter. It has an active surface consisting of 1008 aluminum panels in 14 rows. Each panel has an area between 2.4 and 5.3 square metres. There are 1116 actuators mounted on the backing structure, which move the surface panels correct for the distortion of the mirror with elevation. A quadrupod su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nançay Radio Telescope
Nançay () is a commune in the Cher department in central France. Geography The village is located south of the Sologne and northeast of Vierzon. The Rère flows southwest through the middle of the commune. History Its name comes from Nanciacos and first appeared in 1010 (Acts of the Abbot Engilbert). The territory belonged successively to the County of Sancerre and the area of La Chatre. Joan of Arc stayed there, leaving her name to the ''spring maiden.'' Its castle dates from the fifteenth century, and was rebuilt during the Renaissance. Population Sights *The Nançay Radio Observatory, north of the town. The site was chosen in 1953 by the École Normale Supérieure because of its size, its relative proximity to Paris and the lack of industrial base that can generate noise. Inaugurated by Charles de Gaulle in 1965. The by diameter decametric network (144 branches in 10 000 m²). *ThPôle des Étoilesoffers tours of the Radioastronomy facility, planetarium shows and sel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lovell Telescope
The Lovell Telescope is a radio telescope at Jodrell Bank Observatory, near Goostrey, Cheshire in the north-west of England. When construction was finished in 1957, the telescope was the largest steerable dish radio telescope in the world at 76.2 m (250 ft) in diameter; it is now the third-largest, after the Green Bank telescope in West Virginia, United States, and the Effelsberg telescope in Germany. It was originally known as the "250 ft telescope" or the Radio Telescope at Jodrell Bank, before becoming the Mark I telescope around 1961 when future telescopes (the Mark II, III, and IV) were being discussed.Lovell, ''The Jodrell Bank Telescopes'' It was renamed to the Lovell Telescope in 1987 after Sir Bernard Lovell, and became a Grade I listed building in 1988. The telescope forms part of the MERLIN and European VLBI Network arrays of radio telescopes. Both Bernard Lovell and Charles Husband were knighted for their roles in creating the telescope. In Septemb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effelsberg Radio Telescope
The Effelsberg 100-m Radio Telescope is a radio telescope in the Ahr Hills (part of the Eifel) in Bad Münstereifel, Germany. For 29 years the Effelsberg Radio Telescope was the largest fully steerable radio telescope on Earth, surpassing the Lovell Telescope in the UK. In 2000, it was surpassed by the Green Bank Observatory's Robert C. Byrd Green Bank Telescope in Green Bank, US, which has a slightly larger elliptical 100 by 110-metre aperture. Geography The telescope is located about 1.3 km northeast of Effelsberg, a southeastern part of the town of Bad Münstereifel in North Rhine-Westphalia. It is less than 300 m west of the 398 m high Hünerberg, which is in neighbouring Rhineland-Palatinate. The boundary is a stream, the Effelsberger Bach, which runs only a few metres east of the telescope. The Effelsberger Bach is 6.5 km long, flowing from the Effelsberger Wald into the Sahrbach, which in turn flows south and into the Ahr river. A hiking p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westerbork Synthesis Radio Telescope
The Westerbork Synthesis Radio Telescope (WSRT) is an aperture synthesis interferometer built on the site of the former World War II Nazi detention and transit camp Westerbork, north of the village of Westerbork, Midden-Drenthe, in the northeastern Netherlands. Overview The WRST comprises fourteen 25-metre radio telescopes deployed in a linear array arranged on a East-West line, of which 10 are in a fixed equidistant position, 2 are nearby on a 300 m rail track, and 2 are located a kilometer eastwards on another 200 m rail track. It has a similar arrangement to other radio telescopes such as the One-Mile Telescope, Australia Telescope Compact Array and the Ryle Telescope. Its Equatorial mount is what sets it apart from most other radio telescopes, most of which have an Altazimuth mount. This makes it specifically useful for specific types of science, like polarized emission research as the detectors maintain a constant orientation on the sky during an observation. Ten of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser Interferometer Space Antenna
The Laser Interferometer Space Antenna (LISA) is a proposed space probe to detect and accurately measure gravitational waves—tiny ripples in the fabric of spacetime—from astronomical sources. LISA would be the first dedicated space-based gravitational wave detector. It aims to measure gravitational waves directly by using laser interferometry. The LISA concept has a constellation of three spacecraft arranged in an equilateral triangle with sides 2.5 million kilometres long, flying along an Earth-like heliocentric orbit. The distance between the satellites is precisely monitored to detect a passing gravitational wave. The LISA project started out as a joint effort between NASA and the European Space Agency (ESA). However, in 2011, NASA announced that it would be unable to continue its LISA partnership with the European Space Agency due to funding limitations. The project is a recognized CERN experiment (RE8). A scaled down design initially known as the New Gravitational-wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
