Sunspot Catalogue of the Valencia Observatory (1920-1928)
V.M.S. Carrasco, J.M. Vaquero, A.J.P. Aparicio, M.C. Gallego

TL;DR
This paper presents a machine-readable sunspot catalogue from Valencia Observatory (1920-1928), including quality control, sunspot series, and comparison with other data, offering a reliable resource for solar research.
Contribution
It provides a new, digitized, and quality-controlled sunspot catalogue from Valencia Observatory, enabling improved solar activity analysis.
Findings
The catalogue includes detailed sunspot data from 1920-1928.
Sunspot series are constructed and validated.
Comparison shows the catalogue's reliability with other solar data.
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.
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