no DOT news at present, unfortunately. The DOT is in principle
available but mothballed until there is funding for a revival. It
needs two full-time salaries and about 50 kEuro/year for operation.
You are very welcome to get yourself a very nice solar telescope!
December 2011: Utrecht University
its astronomy program
(which it started back in 1642, the year Isaac Newton was
born). The DOT database server moves to Leiden Obervatory, with the
group of C.U. Keller including F.C.M. Bettonvil. The future of the
DOT is highly uncertain, but in principle the DOT remains available
for self-funded external usage.
Spring 2011: F.C.M. Bettonvil took up a job with
G. Sliepen moved to the
December 2010: Helio Research concluded a successful year of
gathering many filament and prominence observations with the DOT
(over 70 Terabyte in total). Quick-look frame-select movies are
available in the DOT database.
Selected image sequences are under speckle reconstruction.
October 2009: DOT observer V. Olshevsky has
speckle-reconstructed the DOT observations from 2008, reducing the
large backlog that was built up after P. Sütterlin moved to the
SST. These data will appear in the DOT database.
June 2009: the tunable narrow-band Lyot filter for Ba II 4554,
built by V. Skomorovsky and colleagues at Irkutsk, finally came on
line after extensive refurbishment. Due to poor camera
characteristics the images are noisy but still suited to make
Dopplergrams. You are welcome to supply a better camera!
January 1, 2008: our major sponsors during the past years
(Utrecht University Department of Physics and
Astronomy, NWO, NOVA) have terminated their
contributions. In consequence, Dr. P. Sütterlin moved to the
Ir. F.C.M. Bettonvil transited to design studies for the
Nevertheless, DOT availability is continued partially, on a much
reduced budget. Partnerships bringing external funding for on-site
observers and telescope upgrades are welcome.