Spektr-UV
Спектр-УФ
Model of WSO-UV telescope during "Space Week" in Madrid, May 2011
Mission typeSpace telescope
OperatorRussian Astro Space Center
Spacecraft properties
ManufacturerNPO Lavochkin
Payload mass2,840 kg (6,261 lb)
Start of mission
Launch date2030 (proposed)[1]
RocketAngara A5M[2]
Launch siteVostochny Site 1A
ContractorRoscosmos
Main telescope
Wavelengths115 to 315 nm
Spektr program
 

Spektr-UV, also known as World Space Observatory-Ultraviolet (WSO-UV), is a proposed ultraviolet space telescope intended for work in the 115 nm to 315 nm wavelength range.[3][4] It is an international project led by Russia (Roscosmos), with participation from Spain and Japan. The launch had initially been planned for 2007, but has since been continually delayed;[5] as of December 2023, the launch is expected to take place no earlier than 2030[1] atop an Angara A5M rocket from Vostochny Cosmodrome.[2]

Overview

The main instrument of the observatory is a 1.7-metre Ritchey–Chrétien telescope. The telescope will be equipped with the following instruments:

WSO-UV Spectrographs Unit (WUVS) (Russia/Japan)

The WUVS spectrographs assembly consists of four channels:

  • Vacuum Ultraviolet Echelle Spectrograph, VUVES (Russia): The FUV high-resolution spectrograph (VUVES) provides echelle spectroscopy capabilities with high resolution (R ~ 50 000) in the 115–176 nm range.
  • Ultraviolet Echelle Spectrograph, UVES (Russia): The NUV high-resolution spectrograph (UVES) provides echelle spectroscopy capabilities with R ~ 50 000 in the 174–310 nm range.
  • Long-Slit Spectrograph, LSS (Russia): The Long-Slit Spectrograph (LSS) provides low resolution (R ~ 1000), long slit spectroscopy in the 115–305 nm range. The spatial resolution is better than 0.5 arcsec(0.1 arcsec as the best value).
  • UV Spectrograph for observation of Earth-like Exoplanets, UVSPEX (Japan)

WSO-UV Field Camera Unit (FCU) (Russia/Spain)

The FCU has two channels, each fed by an independent pick off mirror:

  • Field Camera Unit FUV channel (FCU/FUV) (Russia/Spain): The far UV (FUV) channel has capabilities for high resolution imaging through the MCP detector, scale 0,047 arcsec/pixel in 115–190 nm range.
  • Field Camera Unit UVO channel (FCU/UVO) (Russia): The UV-optical (UVO) channel is designed for wide field imaging through the CCD detector, scale 0,146 arcsec/pixel in 185–810 nm range.

Proposed and former instruments

  • Stellar Coronograph for Exoplanet Direct Imaging, SCEDI (NAOJ, Rikkyo University, Japan).
  • HIRDES (High-Resolution Double Echelle Spectrograph): R~55000 spectroscopy of point sources in the 102–320 nm range (Germany). Germany exited the Spektr-UV programme due to financial problems, so Russia replaced HIRDES with WUVES.
  • ISSIS (Imaging and Slitless Spectroscopy Instrument for Surveys) was being developed to carry out UV and optical diffraction limited imaging of astronomical objects. The ISSIS would have incorporated three channels: High Sensitivity Far-UV Channel: 120–200 nm; Channel for Surveys (FUV): 120–600 nm, optimized for 120–270 nm; Channel for Surveys (UVO): 120–600 nm, optimized for 270–600 nm (Spain). Due to financial problems, Spain canceled ISSIS, and limited participation in Spektr-UV program to ground segment and supply of detectors for FCU. Russia replaced ISSIS with FCU.

[6][7]

History

In October 2012, tests of antennas for the space telescope were completed.[8]

In July 2019, INASAN selected the first seven experiments to be performed by the observatory.[9]

Participating nations

Spektr-UV is an international project led by Russia (Roscosmos). At present the international cooperation includes three basic participants: Russia (will provide the telescope, spacecraft, launch facilities, ground segment); Spain (FCU detectors, ground segment); Japan (UVSPEX).

See also

References

  1. 1 2 "В Институте астрономии РАН заявили, что обсерваторию "Спектр-УФ" не запустят до 2030 года" [The Institute of Astronomy of the Russian Academy of Sciences said that the Spektr-UV observatory will not be launched until 2030]. TASS (in Russian). 21 December 2023. Retrieved 27 December 2023.
  2. 1 2 "Ученый рассказал о новом контракте на создание обсерватории "Спектр-УФ"" [Scientist discusses new contract for the creation of the Spektr-UV observatory]. RIA Novosti (in Russian). 2021-10-15. Retrieved 2021-10-15.
  3. ↑ Zak, Anatoly (30 December 2022). "Spektr-UF". RussianSpaceWeb. Retrieved 5 February 2023.
  4. ↑ "World Space Observatory - Ultraviolet". WSO-UV (Spain). 2015. Retrieved 2016-10-25.
  5. ↑ "World Space Observatory for the Ultra-Violet (WSO/UV)". Universität Tübingen. Retrieved 2010-03-15.
  6. ↑ "WORLD SPACE OBSERVATORY – ULTRAVIOLET USER’S HAND BOOK" https://wso-jcuva.ucm.es/WSO.UsersBook_rev_es.pdf
  7. ↑ Федеральное государственное бюджетное учреждение науки ИНСТИТУТ АСТРОНОМИИ РОССИЙСКОЙ АКАДЕМИИ НАУК Сборник трудов мемориальной конференции 2018 г., посвященной памяти академика А.А. Боярчука p.346-410 http://www.inasan.ru/wp-content/uploads/2018/12/Boyarchuk.pdf
  8. ↑ "Завершены испытания антенн космического телескопа "Спектр-УФ"" [Testing of the antennas for the Spektr-UV space telescope has been completed] (in Russian). 2012-10-17. Retrieved 2019-10-22.
  9. ↑ "Russian scientists have selected seven experiments for Spektr-UV space telescope project". TASS. 2019-07-06. Retrieved 2020-03-15.
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