DOT facts

Optics
   Prime mirror (Cervit): aperture 45 cm, focal length 200 cm
   Quality: rms 0.011 micron = wavelength/50
   Prime-focus field stop (hole in water-cooled mirror): 1.6 mm
   Field of view: 150 arcsec

Telescope
   Mount: parallactic, brushless push-pull pairs of servo motors
   Gears: 1:75000 reduction in four floating-gear steps
   Weight: 16 tons

Tower
   Design: permits only parallel platform motion, no tilts
   Construction: open steel framework
   Height: 15 meter
   Weight: 13 tons

Canopy
   Design: fold-away clam-like shell
   Construction: teflon-like-coated PVC fabric on heavy steel ribs
   Diameter: 7 meter

Image acquisition system
   Blue cameras: Hitachi KP-F100 (1296 x 1030 px, square 6.7 micron px, well depth 16000, 10 bits, 12 frames/s, bad non-linearity)
      Field of view: 92 x 73 arcsec, 0.071 arcsec/px
   Red cameras: Redlake MegaPlus II ES4020 (2K x 2K px, square 14.84 micron pixels
      Field of view: 113 x 113 arcsec, 0.110 arcsec/px
   Fiber links: dual way, custom made (IGF)

DOT speckle processor

Location
   Observatorio del Roque de los Muchachos
   Instituto de Astrofísica de Canarias
   Isla de La Palma, Spain
   The DOT is controlled from the SST building of the Institute for Solar Physics of the Royal Swedish Academy of Sciences

Former team
   SIU director & solar physics program leader: Prof. Dr. Christoph U. Keller
   DOT builder: Dr. Ir. Robert H. Hammerschlag
   DOT scientist: Prof. Dr. Robert J. Rutten
   DOT engineer: Ir. Felix C.M. Bettonvil
   DOT software engineer: Drs. Guus Sliepen
   DOT technicians: Piet W. Hoogendoorn, Aswin Jägers

Construction
   Workshop Sterrekundig Instituut Utrecht
   Centrale Werkplaats Technische Universiteit Delft
   Instrumentele Groep Fysica Universiteit Utrecht

Former funding
   Sterrekundig Instituut Utrecht (Utrecht University)
   Department of Physics and Astronomy (Utrecht University)
   Utrecht University
   Netherlands Organization for Scientific Research (NWO)
   Netherlands Graduate School for Astronomy (NOVA)
   Stichting Technische Wetenschappen STW (NWO)
   Stichting ASTRON (NWO)
   European Solar Magnetometry Network (EC-TMR)
   European Solar Magnetism Network (EC-RTN)
   North Atlantic Treaty Organization (NATO-CRG)
   International Association INTAS
   Stichting Optisch Zonneonderzoek in Utrecht (SOZOU)
   Stichting N. van Ballegooijenfonds
   Pieter Langerhuizen Lambertuszoon Fonds
   U.S. National Science Foundation, via Helio Research

DOT websites
   DOT: http://www.staff.science.uu.nl/~rutte101/dot  = http://www.dot.iac.es
   DOT database: ftp://dotdb.strw.leidenuniv.nl
   DOT search engine: http://dotdb.strw.leidenuniv.nl/search
   DOT observer wiki: http://dotdb.strw.leidenuniv.nl/wiki
   R.J. Rutten: http://www.staff.science.uu.nl/~rutte101

Dutch Open Telescope
   phone office (= recorder = fax):  +34-922405571
   phone control room:  +34-922405573    mail:
        C/O Grupo Sueco
        Apartado 66
        E-38700 Santa Cruz de La Palma
        Islas Canarias, Spain

Swedish 1-m Solar Telescope (SST)
   phone:  +34-922405590
   fax:  +34-922405592    mail:
        Grupo Sueco
        Apartado 66
        E-38700 Santa Cruz de La Palma
        Islas Canarias, Spain

Rob Rutten 2017-11-18