Sunrise (telescope)

The Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory telescope, a UV filter imager, an imaging vector polarimeter, an image stabilization system and further infrastructure. The first science flight of Sunrise yielded high-quality data that reveal the structure, dynamics and evolution of solar convection, oscillations and magnetic fields at a resolution of around 100 km in the quiet Sun.[3]

Sunrise Balloon-Borne Solar Observatory
Mission typeBalloon-borne telescope
Operator Max Planck Institute for Solar System Research (MPS)
WebsiteOfficial Page
Mission duration6 days (2009), 5 days (2013)
Spacecraft properties
ManufacturerMax Planck Institute for Solar System Research
Kiepenheuer Institute for Solar Physics
High Altitude Observatory
Lockheed Martin Solar and Astrophysics Laboratory
Instituto de Astrofísica de Canarias
Instituto Nacional de Técnica Aeroespacial
Instituto de Astrofísica de Andalucía
Grupo de Astronomía y Ciencias del Espacio
Launch mass2 t (2.0 long tons; 2.2 short tons)
Power1.5 kW
Start of mission
Launch date8 June 2009 and 12 June 2013
RocketBalloon
Launch siteEsrange Space Center
Kiruna, Sweden
End of mission
Landing date14 June 2009 and 17 June 2013[1][2]
Landing siteNunavut, Canada
Main
WavelengthsSuFI: 225, 280, 300, 313, 388 nm
IMaX: 525.06 nm
SUPOS: 854, 853.8 nm
Resolution0.13-0.15 arcsec
 

Overview

The strong absorption of UV radiation by the Earth's atmosphere makes it challenging to carry out ground-based observations at these wavelengths. A balloon mission reaching altitudes of above 30 km benefits from a reduction of UV absorption by 99%, making engineering solutions for the telescope easier. The launch site was in the arctic region to make uninterrupted observation of the Sun over several days possible. The telescope has a 1 metre primary mirror that directs the 1 kW of solar radiation to the first focal point where 99% of the radiation is reflected out of the telescope, the remaining light is transferred into several instruments.[4]

The one metre diameter primary mirror is made from a glass ceramic zerodur,[5] it is the central part of the gondola of nearly 2 tons. Solar panels of 1.5 kW output power are used to power the onboard equipment and a hard disk array of 2 x 2.4 Terabyte is used to store the data during flight.[4][6]

Instruments
  • CWS, Correlating Wavefront Sensor is a CCD camera with 1 kHz read-outs responsible generate the images necessary for image stabilization and proper alignment.[4]
  • SUFI, Sunrise Filter Imager observes the sun in five distinct wavelengths 214, 300, 312, 388 and 397 nm, on a 2048 x 2048 pixel CCD, through a filter wheele.[4]
  • IMaX, Imaging Magnetograph eXperiment observes the Zeeman splitting of the iron line (FeI) around 525 nm. The observed field of view is 50 x 50 arcseconds.[4]

Flights
  1. Sunrise's first flight was launched at 8:05 8 June 2009 local time from Esrange, near Kiruna, Sweden[7] and it landed 1:45 14 June 2009 local time on Somerset Island, Nunavut, northern Canada after a flight duration nearly six days.[8][9]
  2. Sunrise's second flight was launched at 7:38 (5:38 UTC) on 12 June 2013 from Esrange, near Kiruna, Sweden,[10][11] and it landed afternoon 17 June 2013 on Boothia peninsula, Nunavut, northern Canada after a flight duration of over 5 days.

See also

References
  1. "Sunrise - A balloon-borne solar telescope". MPS.
  2. "Brief instrument overview" (PDF). Sunrise consortium. Retrieved 1 February 2014.
  3. Sami Solanki. "First results from the Sunrise mission" (PDF). Astronomical Society of the Pacific.
  4. Barthol, P; Gandorfer, A; Solanki, S; Knolker, M; Pillet, V; Schmidt, W; Title, A (2008). "SUNRISE: High resolution UV/VIS observations of the sun from the stratosphere" (PDF). Advances in Space Research. 42 (1): 70–77. Bibcode:2008AdSpR..42...70T. doi:10.1016/j.asr.2007.09.024.
  5. Berkefeld, T.; Schmidt, W.; Soltau, D.; Bell, A.; Doerr, H. P.; Feger, B.; Friedlein, R.; Gerber, K.; Heidecke, F.; Kentischer, T.; Lühe, O.; Sigwarth, M.; Wälde, E.; Barthol, P.; Deutsch, W.; Gandorfer, A.; Germerott, D.; Grauf, B.; Meller, R.; Álvarez-Herrero, A.; Knölker, M.; Martínez Pillet, V.; Solanki, S. K.; Title, A. M. (2010). "The Wave-Front Correction System for the Sunrise Balloon-Borne Solar Observatory". Solar Physics. 268: 103. arXiv:1009.3196. Bibcode:2011SoPh..268..103B. doi:10.1007/s11207-010-9676-3.
  6. Schmidt, W.; Solanki, S.K.; Barthol, P.; Berkefeld, T.; Gandorfer, A.; Knölker, M.; Martínez Pillet, V.; Schüssler, M.; Title, A. (2010). "SUNRISE - Impressions from a successful science flight". Astronomische Nachrichten. 331 (6): 601. Bibcode:2010AN....331..601S. doi:10.1002/asna.201011383.
  7. "Giant SUNRISE Telescope Successfully Launched". Spaceref. 8 June 2009. Retrieved 1 February 2014. The giant telescope SUNRISE was launched from Esrange Space Center in northern Sweden. At 08.05 (local time) this morning, the largest balloon born telescope ever took off from Swedish Space Corporation's (SSC) launch facility at Esrange Space Center in northern Sweden.
  8. "Deutsche Forscher starten Sonnenteleskop "Sunrise"" (in German). Spiegelonline. 8 June 2009.
  9. "Sunrise Science-Blog". MPS.
  10. "Esrange website". Archived from the original on 21 October 2013.
  11. "SUNRISE, successfully lifted off on June 12". SSC group. Retrieved 1 February 2014. SUNRISE was successfully launched from Esrange Space Center on June 12, 2013 at 05.38 UTC.
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