Scans of plates kept at Landessternwarte Heidelberg-Königstuhl. They
were obtained at location, at the German-Spanish Astronomical Center
(Calar Alto Observatory), Spain, and at La Silla, Chile. The plates
cover a time span between 1880 and 1999.
Specifically, HDAP is essentially complete for the plates taken with
the Bruce telescope, the Walz reflector, and Wolf's Doppelastrograph
at both the original location in Heidelberg and its later home on
Königstuhl.
If you use
this data, please
acknowledge: "This work made use of the HDAP which was produced at
Landessternwarte Heidelberg-Königstuhl under grant No. 00.071.2005
of the Klaus-Tschira-Foundation."
The data in this service was calibrated using Astrometry.net,
:bibcode:`2010AJ....139.1782L`.✖[remove]1
To the extent possible under law, the publisher has waived all copyright and related or neighboring rights to the HDAP scans. For details, see the `Creative Commons CC0 1.0 Public Domain dedication <http://creativecommons.org/publicdomain/zero/1.0/>`_. Of course, you should still give proper credit when using this data as required by good scientific practice.
.. image:: /static/img/cc0.png
:alt: [CC0]
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