South African Astronomical Observatory

Coordinates: 33°56′05″S 18°28′39″E / 33.9347°S 18.4776°E / -33.9347; 18.4776
Source: Wikipedia, the free encyclopedia.

South African Astronomical Observatory
Sutherland, Northern Cape
CoordinatesHeadquarters: 33°56′05″S 18°28′39″E / 33.9347°S 18.4776°E / -33.9347; 18.4776
Sutherland: 32°22′42″S 20°48′38″E / 32.3783°S 20.8105°E / -32.3783; 20.8105
Established
  • 20 October 1820; 203 years ago (1820-10-20) - As the Royal Observatory Cape of Good Hope
  • 1972; 52 years ago (1972) - As the South African Astronomical Observatory
    modified Dall-Kirkham telescope
South African Astronomical Observatory is located in South Africa
South African Astronomical Observatory
Location of South African Astronomical Observatory
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South African Astronomical Observatory (SAAO) is the national centre for optical and infrared astronomy in South Africa. It was established in 1972. The observatory is run by the

Sutherland, which is 370 kilometres (230 mi) from Observatory, Cape Town, where the headquarters is located.[2]

The SAAO has links worldwide for scientific and technological collaboration. Instrumental contributions from the South African Astronomical Observatory include the development of a spherical aberration corrector and the Southern African Large Telescope (SALT).

The Noon Gun on Cape Town's Signal Hill is fired remotely by a time signal from the Observatory.

History

The buildings of the South African Astronomical Observatory in Cape Town.

The history of the SAAO began when the

£30,000[4] (equivalent to £2.8 million in 2024[5]
). The post of His/Her Majesty's astronomer at the Cape of Good Hope was awarded the
arc of the meridian at the Cape of Good Hope[6] and the second to David Gill in 1903 for researches in solar and stellar parallax, and his energetic direction of the Royal Observatory at the Cape of Good Hope.[7]

The

Republic Observatory, Johannesburg, was merged with the much older Royal Observatory, Cape of Good Hope in January 1972 to form the South African Astronomical Observatory. In 1974 the Radcliffe Observatory
telescope was purchased by the CSIR and moved to Sutherland, where it recommenced work in 1976.

SAAO was established in January 1972, as a result of a joint agreement by the Council for Scientific and Industrial Research (CSIR) of South Africa and Science and Engineering Research Council (SERC) of United Kingdom. The headquarters are located on the grounds of the old Royal Observatory where the main building, offices, national library for astronomy and computer facilities are housed. Historic telescopes are also found at the headquarters in a number of domes and a small museum that displays scientific instruments. The South African Astronomical Observatory is administered at present as a National Facility under management of the National Research Foundation (NRF), formerly the Foundation for Research Development (FRD). In 1974, when the Radcliffe Observatory in Pretoria closed, the Council for Scientific and Industrial Research (CSIR) purchased the 1.9-m Radcliffe telescope and transported it to Sutherland.[8]

Facilities

Sutherland, Northern Cape

The observatory operates from the campus of the Royal Observatory, Cape of Good Hope that was established in 1820[9] in the suburb of Observatory, Cape Town.

The major observing facilities are, however, located near the town of Sutherland some 370 kilometres (230 mi)[2] from Cape Town. Sutherland was chosen because of its reliably clear and dark nights, but to ensure long term viability of the Karoo site astronomy instruments, the South African Parliament passed the Astronomy Geographic Advantage Act in 2007. The act gives the Minister of Science and Technology the authority to protect areas, through regulations, that are of strategic national importance for astronomy and related scientific endeavours.

Telescopes

MASTER telescope domes at the South African Astronomical Observatory

0.50m telescope

This 0.5 metres (20 in) reflector was originally built for the

Republic Observatory
in 1967, but was moved to the Sutherland site in 1972. No longer in use.

The 20" telescope was replaced with the Meerlicht telescope. The 20" telescope was relocated to the University of Freestate Boyden observatory and commissioned in ~2019[10]

0.75m telescope

A 0.75 metres (30 in)

Grubb Parsons
reflector.

1.0m Telescope

One of the six Probing Lensing Anomalies Network telescopes.
See also: Probing Lensing Anomalies Network

This 40 inches (1.0 m) telescope was originally located at SAAO Head office in Observatory, Cape Town, but has since moved to the Sutherland site.[11] This telescope participates in the PLANET network.[12]

1.9m Telescope

The 74" Reflector
Not to be confused with the Radcliffe 18/24-inch Double Refractor at the
University of London Observatory
.

The 1.9-m (74-inch) Radcliffe Telescope was commissioned for the

Sir Howard Grubb, Parsons and Co.[14]

Alan Cousins Telescope (ACT)

This 29.5 inches (75 cm) telescope was originally called the Automatic Photometric Telescope, but has been renamed the Alan Cousins Telescope in honour of Alan William James Cousins.[15][16]

BiSON

Main article: Birmingham Solar Oscillations Network

One of six telescopes in the Birmingham Solar Oscillations Network

Infrared Survey Facility (IRSF)

The IRSF is a 140 centimetres (55 in) reflector fitted with a 3 colour Infrared Imager.

Japanese Ministry of Education, Culture, Sports, Science and Technology in 2000.[18]
Other studies the telescope participated in include:

Las Cumbres Observatory Global Telescope Network

Main article:
Las Cumbres Observatory Global Telescope Network

Three 1 metre (39 in) telescopes to form part of the LCOGT network were installed in early 2013.[20]

MASTER

The MASTER-SAAO Telescope (obs. code:

K95) is part of the Russian Mobile Astronomical System of Telescope-Robots. It saw first light on 21 December 2014.[21] It consists of two paired 0.4-m telescopes.[22] In April 2015 it discovered the first comet from South Africa in 35 years, C/2015 G2 (MASTER).[23]

MONET

One of the two 1.20 metres (47 in) telescopes of the MOnitoring NEtwork of Telescopes Project is located at Sutherland. Its twin can be found at the McDonald Observatory in Texas.[24] The MONET telescopes are Robotic telescope controllable via the Internet and was constructed by the University of Göttingen.[25] Remote Telescope Markup Language is used to control the telescopes remotely.[26]

PRIME

Photo of PRIME observatory with the galactic bulge in the background.
PRIME observatory located in Sutherland.

NASA Goddard Space Flight Center[29] and Astro-Biology Center. The project's primary science objective is the study of exoplanets using gravitational microlensing.[30]

Project Solaris

Solaris-1 and Solaris-2

Two telescopes forming part of

eclipsing binary stars and to characterise these binaries to improve stellar models.[31]

SALT

Southern African Large Telescope (SALT)

Main article: Southern African Large Telescope
Observatory Code: B31
Observations: (Near Earth Objects)

SALT was inaugurated in November 2005. It is the largest single optical telescope in the Southern Hemisphere, with a hexagonal mirror array 11 meters across. SALT shares similarities with the

quasars
.

SuperWASP-South

SuperWASP-South

Main article:
SuperWASP
See also:
List of extrasolar planets

The Wide Angle Search for Planets consists of two

retrograde orbit
was discovered in 2009 using this array.

KELT-South

KELT-South (Kilodegree Extremely Little Telescope – South) is a small robotic telescope that is designed to detect transiting extrasolar planets. The telescope is owned and operated by Vanderbilt University and was based on the design of KELT-North, which was conceived and designed at the Ohio State University, Department of Astronomy. The KELT-South telescope will serve as a counterpart to its northern twin, surveying the southern sky for transiting planets over the next few years.

MeerLICHT

Observatory Code: List of observatory codes § L66

Optical wide-field telescope, installed in 2017. It has a 60 cm (24 in) effective aperture, and a 1.65 x 1.65 degree field-of-view, sampled at 0.56"/pix. It was designed and manufactured in the Netherlands (

Radboud University & NOVA) and is run by a consortium of Radboud University, University of Cape Town, the NRF/SAAO, the University of Oxford, the University of Manchester and the University of Amsterdam. It is the optical eye of MeerKAT, and has as its main-purpose to twin with the MeerKAT radio array to achieve a simultaneous optical-radio coverage of the Southern Skies. It is the prototype of the BlackGEM
array, installed at ESO La Silla in Chile.

MeerLICHT telescope inside the former 20-inch telescope dome
MeerLICHT telescope

Yonsei Survey Telescopes for Astronomical Research (YSTAR)

Observatory Code: List of observatory codes § A60

The Yonsei Survey Telescopes for Astronomical Research (YSTAR), decommissioned in 2012, was used for the monitoring of variable stars and other transient events. YSTAR was a joint project between SAAO and the Yonsei University, Korea.[25]

Geophysical

South African Geodynamic Observatory Sutherland (SAGOS)

The GeoForschungsZentrum, Potsdam in co-operation with the

National Research Foundation of South Africa
constructed the SAGOS between 1998 and 2000.

SAGOS consist of a 1 Hz permanent GPS station, a superconducting gravimeter, meteorological sensors, and a tri-axial magnetometer. The GPS station is also used in support of the

Gravity Recovery and Climate Experiment (GRACE) space missions.[34]

SUR Station

The SUR station forms part of the

Global Seismographic Network of the Incorporated Research Institutions for Seismology[35][36]

See also

References

  1. ^ "SAAO Annual Review 2020-2021" (PDF).
  2. ^ a b "Additional information about SAAO Sutherland". South African Astronomical Observatory. Archived from the original on 14 October 2010. Retrieved 3 October 2010.
  3. South African Department of Science and Technology. Archived from the original
    on 30 August 2009. Retrieved 30 January 2009.
  4. ^ "The Transit of Venus – The Expedition at the Cape of Good Hope". The New York Times. 6 December 1874. Retrieved 16 July 2011.
  5. ^ UK Retail Price Index inflation figures are based on data from Clark, Gregory (2017). "The Annual RPI and Average Earnings for Britain, 1209 to Present (New Series)". MeasuringWorth. Retrieved 11 June 2022.
  6. ^ "Royal archive winners before 1900". The Royal Society. Retrieved 6 December 2008.
  7. ^ "Royal Medal Winners:1949 – 1900". The Royal Society. Retrieved 1 December 2008.
  8. ISBN 978-1-4020-0812-2
    .
  9. ^ Holden, Edward Singleton (1888). "The Principal Observatories of the World". Hand-book of the Lick Observatory of the University of California. p. 112. Retrieved 2 October 2010.
  10. ^ "Astrophysics Research Facilities".
  11. ^ "The 40-inch Elizabeth telescope". South African Astronomical Observatory. Archived from the original on 19 September 2012. Retrieved 28 January 2009.
  12. ^ "It's Far, It's Small, It's Cool: It's an Icy Exoplanet! Distant Planet Brings Astronomers Closer To Home" (PDF). Retrieved 15 May 2009.
  13. ^ "Radcliffe 74-inch (1.9-m)". South African Astronomical Observatory. Retrieved 3 May 2017.
  14. ^ Astronomical Instruments. Grubb Parsons. 1956.
  15. ^ "The Alan Cousins Telescope – Automatic Photometric Telescope". South African Astronomical Observatory. Archived from the original on 9 September 2012. Retrieved 29 January 2009.
  16. ^ "Automatic Photometric Telescope (APT)". Astronomical Society of Southern Africa. Archived from the original on 18 July 2011. Retrieved 29 January 2009.
  17. ^ "IRSF telescope". South African Astronomical Observatory. Archived from the original on 9 September 2012. Retrieved 30 January 2009.
  18. ISSN 0374-2466
    .
  19. Bibcode:2003BASI...31..403B
    .
  20. S2CID 118585975
    .
  21. ^ "First Light with MASTER-SAAO". SAAO – South African Astronomical Observatory. 23 December 2014. Retrieved 3 May 2017.
  22. ^ MASTER-SAAO
  23. ^ "C/2015 G2 (MASTER) is first South African Comet discovery in 35 years". Africa2Moon. Archived from the original on 12 May 2015. Retrieved 20 May 2015.
  24. ^ "Research Facilities". McDonald Observatory. Retrieved 15 May 2009.
  25. ^ a b "Telescopes". South African Astronomical Observatory. Retrieved 30 January 2009.
  26. Bibcode:2003AAS...202.3809H
    .
  27. ^ "SAAO | Astronomers". Retrieved 13 June 2023.
  28. ^ "UMD Astronomy: 2022 News". Retrieved 13 June 2023.
  29. ^ "NASA's Roman Mission Delivers Detectors to Japan's PRIME Telescope". Retrieved 13 June 2023.
  30. ^ "PRime-focus Infrared Microlensing Experiment". Retrieved 13 June 2023.
  31. ISSN 0024-8266
    .
  32. ^ "First Light". South African Large Telescope. Retrieved 15 May 2009.
  33. ^ "Welcome to the WASP website". SuperWASP. Archived from the original on 8 December 2002. Retrieved 30 January 2009.
  34. ^ "South African Geodynamic Observatory Sutherland (SAGOS)". Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences. Retrieved 30 January 2009.
  35. ^ "Geophysical Facilities". South African Astronomical Observatory. Retrieved 30 January 2009.
  36. ^ "Station SUR, Sutherland, Republic of South Africa". Project IDA. Retrieved 30 January 2009.

Further reading

External links

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External image
image icon Photos of the dome of the Victoria telescope from the University of Cambridge
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