Welcome to the Photographic Plate Archive containing astronomical observations
conducted by OATo astronomers between 1925 abd 1996

The following table gives a short description of the fields extracted from the Master Plate Catalog that are included in the online version of the catalog. For more detailed information on the construction of the plate catalog see the INAF Technical Report N. 198.

Notes:
(a) Fields UID e SCAN, not present in Table 3 of Technical Report 198, have been added to the online catalog; (b) Field Image_file is a link to a downloadable image of the plate in JPEG format; (c) A field value equal to N.S. o -99999 indicates that the original source is missing or uncertain; all retrieved informations are reported in the field 'Notes' shown along with the image.

Query Functions : The catalog can be scrolled sequentially by using the function 'Go to' at the bottom of the page; by clicking on a field name the whole catalog is ordered according to that field; the 'Search' botton enables queries on single or multiple fields; to display all the informations regarding an observation, click on the icon at the beginning of the corresponding record.
For further informations or requests please contact Beatrice (beatrice.bucciarelli@inaf.it) and/or Sibilla (sibilla.perina@inaf.it)

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Acknowledgements
The systematic cataloguing of OATo historical photographic plates and full observation records was made possible thanks to the initial involvement of Gabriella Bernardi, whose dedicated work at OATo was supported by the Piedmont Region (determinations 9.08.2006 n. 302 and 14.06.2007 n. 206).
A precious contribution to the update of the online catalog version, as well as to the archival of photographic material came from the OATo librarian, Dr. Tullia Carriero.
We also thank the high-school students Matteo Tivan (Liceo Scientifico Pellico-Peano, Cuneo), Giorgio Piovano, Matteo Garello, Karol Ranieri, and Ettore Da Silva Trinidade (Liceo Statale Augusto Monti, Chieri, Torino), for their participation to this project under the Ministry of Education's program 'Alternanza Scuola-Lavoro' (PCTO).