Sunspot Catalogue of the Valencia Observatory (1920-1928)

Abstract

A sunspot catalogue was maintained by the Astronomical Observatory of Valencia University (Spain) from 1920 to 1928. Here we present a machine-readable version of this catalogue (OV catalog or OVc), including a quality control analysis. Sunspot number (total and hemispheric) and sunspot area series are constructed using this catalogue. The OV catalog's data are compared with other available solar data, demonstrating that the present contribution provides the scientific community with a reliable catalogue of sunspot data.

20 pages, 12 figures, accepted for publication in Solar Physics

References in corpus (3)

• Historical Sunspot Observations: A Review
• The butterfly diagram in the 18th century
• The north-south asymmetry of soft X-ray flare index during solar cycles 21, 22 and 23

Cited by in corpus (4)

• Sunspot Catalogue of the Observatory of the University of Coimbra (1929-1941)
• Equivalence relations between the Cortie and Zurich sunspot group morphological classifications
• Eric Strach: four decades of detailed synoptic solar observations (1969-2008)
• Testing the accuracy of Coimbra Astronomical Observatory solar filament historical series (1929-1941)