4C Array: Difference between revisions

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{{Short description|Radio telescope in Cambridge, England}}

{{Infobox Telescope

{{Use dmy dates|date=April 2022}}

| name = 4C Array

{{unreferenced|date=October 2015}}

| image =

{{Infobox Telescopetelescope}}

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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 [[Cambridge Optical Aperture Synthesis Telescope (COAST)|COAST]]).{{Citation needed|date=January 2024}} The first large aperture synthesis telescope ([[1958]]), it was also the first new instrument to be built at [[Lord's Bridge (Cambridgeshire)|Lord's Bridge]], after the [[Mullard Radio Astronomy Observatory|Observatory]] was moved there in [[1957]], and needed {{convert|64 |km (40 miles)|mi|abbr=on}} of reflector wire (since removed).{{Citation needed|date=January 2024}} The 4C operated at 178  MHz (1.7 m), and located nearly 5000 sources of the [[4CFourth Cambridge Survey|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.{{Citation needed|date=January 2024}}

| organization = [[Mullard Radio Astronomy Observatory]]

| ___location = [[Lord's Bridge]], nr. [[Cambridge]], [[England]]

| coords = {{coor at d|52.164147|N|0.033174|W}}

| altitude =

| weather =

| wavelength = 1.7m

| built = 1958

| first_light =

| website =

| style = Cylindrical paraboloid

| diameter =

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}}

The '''4C Array''' is a cylindrical paraboloid [[radio telescope]] at the [[Mullard Radio Astronomy Observatory]]. 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 [[Cambridge Optical Aperture Synthesis Telescope (COAST)|COAST]]). The first large aperture synthesis telescope ([[1958]]), it was also the first new instrument to be built at [[Lord's Bridge]], after the [[Mullard Radio Astronomy Observatory|Observatory]] was moved there in [[1957]], and needed 64 km (40 miles) of reflector wire (since removed). The 4C operated at 178 MHz (1.7 m), and located nearly 5000 sources of the [[4C|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.

It is flanked to the northwest by the [[Cosmic Anisotropy Telescope]] enclosure and to the south by the [[One-Mile Telescope|One-Mile]] and [[Half-Mile Telescope]]s.{{Citation needed|date=January 2024}}

==External links==

[[File:cmglee Cambridge MRAO One Mile Half Mile 4C.jpg|thumb|250px|none|One antenna of the One-Mile Telescope (left), two of the Half-Mile Telescope (centre) and the remains of the 4C Array (right) in June 2014]]

*[http://maps.google.com/maps?t=k&hl=en&ll=52.164147,0.033174&spn=0.004021,0.009238 The 4C array on Google maps], flanked by the [[Cosmic Anisotropy Telescope|CAT]] enclosure (upper left) and the [[One-Mile Telescope|One-Mile]] and [[Half-Mile Telescope]]s (below)

== References ==

<references />

[[Category:Cavendish Laboratory]]

[[Category:Radio telescopes]]

[[Category:Interferometric telescopes]]

[[Category:Astronomical observatories in England]]

{{observatory-stub}}