Previous page  Page 68   Next page    Table of Contents 

were on CD-ROM.)

   Because of the concern about fitting everything on the DVD, a lot of
effort went into compressing the larger datasets. Little was usually
done to smaller datasets,  since compressing them would not have
helped very much anyway.

   Full details on accessing the datasets are available at:

http://www.projectpluto.com/access.htm

   This is updated from time to time.  If a dataset is not currently
documented,  that usually just means nobody has asked about it yet. If
you'd like to access a particular dataset,  please contact Project Pluto.

24: ACKNOWLEDGMENTS        

   Much of the data for this DVD came through the Centre des Donnees
Astronomiques de Strasbourg:

http://cdsweb.u-strasbg.fr

   The Hipparcos and Tycho data were created by the European Space
Agency,  and are used here by permission.

   The source for faint stars is the third USNO CCD Astrograph Catalog
(UCAC-3).  Norbert Zacharias,  the principal investigator for this
project,  was very helpful in puzzling out the details of how this
catalog works and what its strengths and limitations are.
                                                 
   The PGC (Principal Galaxy Catalog) was obtained from the Universite de
Lyon.  It was compiled by G. Paturel and L. Bottinelli of the Observatoire
de Paris,  and forms the basis for displaying galaxies at detailed levels.
                                                
   The RC3 (Third Revised Catalog of Galaxies) was obtained from Dr.
Harold Corwin,  at the California Institute of Technology.  It was
compiled by G. and A. de Vaucouleurs,  H. G. Corwin,  R. J. Buta,  G.
Paturel,  and P. Fouque.  With the PGC,  it is largely responsible for
the great improvements in the accuracy and quantity of data provided
for galaxies.

   The primary source for data on NGC and IC objects comes from Wolfgang
Steinicke's data, http://www.klima-luft.de/steinicke/index_e.htm,
used by permission here.

   Comments on many NGC and IC objects were supplied by Steve Coe, who
kindly gave permission for extracts from his observing notes to be shown
in "more info".

   Additional NGC and IC data comes from the Saguaro Astronomy Club. The
members of this club did an enormous amount of work in cleaning up many
errors in the RNGC and NGC2000 catalogs in the course of producing this

 Previous page  Page 68   Next page    Table of Contents