Description
The APPLAUSE Data Release 1 contains metadata about photographic plates and data extracted from digitized plates.
The source catalogue contains 1.66 billion extracted sources. The majority of sources have their positions (right ascension and declination) calibrated with the help of the UCAC4 catalogue. The database contains 837 million sources with matched UCAC4 designations and 111 million sources with Tycho-2 designations.
The APPLAUSE DR1 database is organised in 13 tables.
Along with the data we publish the version of the pyplate software which was used to process the scanned material.
Attribution
If you have made substantial use of the data provided by APPLAUSE DR1, 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) and the Hamburger Sternwarte (University of Hamburg).
Tables
An archive in APPLAUSE is a collection of plates, logbooks, and extracted data that originate from a specific instrument. The archive table contains one row for each plate archive. Unique Identifier archive_id
The table contains data on photographic plates or films as physical objects. An entry in this table does not guarantee that a scan of the plate is available. Unique Identifier plate_id
Exposure time and observation time for plates. Unique Identifier exposure_id
Sub exposures provide exposures, which were split into n fragments. Unique Identifier exposure_id
The scan table registers all ingested scans of the photographic plates, giving sizes, etc. Unique Identifier scan_id
Table of extracted sources. A row in the source table corresponds to an extracted source from a plate scan. Unique Identifier source_id
Sources without magnitudes by pyplate. Unique Identifier source_id
This table contains raw magnitudes (from source table), sky coordinates and source designations, exposure and observation time. Unique Identifier source_id.
Information about logbooks from various archives or observation sites. There is no direct relation betweeen a plate and a logbook. Unique Identifier logpage_id
The logpage table contains data on individual digitized logbook pages and also images of plate covers/envelopes. Unique Identifier logpage_id
The plate_logpage table stores links between plates and logbook pages / plate envelopes.
The process table contains data on pyplate"s processing of source extraction and astrometric calibration of plate scans. Unique Identifier process_id
The table contains astrometric solutions of plate scans. Unique Identifier solution_id
HEALPix center coordinates (nside=256, nested scheme)
You can access this schema using the query interface and download the results afterwards.
You can use the following DOI to cite this schema in a publication:
This dataset is published under the CC0 1.0 Universal (CC0 1.0).