Archives of Photographic PLates for Astronomical USE

Previews of photographic plates (applause_dr4.preview)

The table has 105854 rows, 13 columns.


The preview table registers information on files you can download from the APPLAUSE site. (previews, etc. , giving sizes, etc. A scan is a high-resolution image of a photographic plate or film. There can be multiple scans of a single plate. Unique Identifier preview_id


If you have made substantial use of the data provided by APPLAUSE DR4, kindly include this acknowledgement

Funding for APPLAUSE has been provided by DFG (German Research Foundation, Grant), Leibniz Institute for Astrophysics Potsdam (AIP), Dr. Remeis Sternwarte Bamberg (University Nürnberg/Erlangen), the Hamburger Sternwarte (University of Hamburg) and Tartu Observatory. Plate material also has been made available from Thüringer Landessternwarte Tautenburg.


Name Type UCD Unit Description
preview_id int
Preview identification number
plate_id int Plate identification number
archive_id int Archive identification number
preview_type short meta.code Preview type: 1 - photograph of the plate (before cleaning), 2 - scan of the plate (before cleaning), 3 - downscaled version of the full-resolution plate scan
filename char meta.ref
Name of the processed file
file_format char meta.code.class
File format
image_width short phys.size Width in pixels of the digitized log-page image
image_height short meta.number
Height in pixels of the digitized log-page image
image_datetime char meta.number
Time of creation of the digital image
file_datetime char time.creation
Time[yyyy-mm-dd hh:mm:ss] Timestamp of the last change of file
file_size int meta.number
byte File size
timestamp_insert char time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of insert
timestamp_update char time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of last update