158 citations · 656 across the 26 of their papers we have counts for
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Revisiting the Amplitude of Solar Cycle 9: The Case of Sunspot Observations by W.C. Bond
V. M. S. Carrasco, M. C. Gallego, R. Arlt +1
William Cranch Bond, director of the Harvard College Observatory in mid-19th century, carried out detailed sunspot observations during the period 1847-1849. We highlight Bond was t…
Sunspot Records by Antonio Colla just after the Dalton Minimum
V. M. S. Carrasco, C. Bertolin, F. Domínguez-Castro +3
Antonio Colla was a meteorologist and astronomer who made sunspot observations at the Meteorological Observatory of the Parma University (Italy). He carried out his sunspot records…
Soonspot: Software to Determine Areas and Sunspot Positions
P. Galaviz, V. M. S. Carrasco, F. Sánchez-Bajo +2
A new software (Soonspot) for the determination of the heliographic coordinates and areas of sunspots from solar images is presented. This program is very user-friendly and the acc…
Sunspot characteristics at the onset of the Maunder Minimum based on the observations of Hevelius
V. M. S. Carrasco, J. M. Vaquero, M. C. Gallego +8
An analysis of the sunspot observations made by Hevelius during 1642-1645 is presented. These records are the only systematic sunspot observations just before the Maunder Minimum.…
Sunspot observations by Charles Malapert during the period 1618-1626: a key dataset to understand solar activity before the Maunder minimum
V. M. S. Carrasco, M. C. Gallego, J. Villalba Álvarez +1
A revision is presented of the sunspot observations made by Charles Malapert from 1618 to 1626, studying several documentary sources that include those observations. The revised ac…
Eric Strach: four decades of detailed synoptic solar observations (1969-2008)
V. M. S. Carrasco, J. M. Vaquero, V. M. Olmo-Mateos
Eric H. Strach (1914-2011) studied medicine at University of Prague and graduated in 1938. Strach dedicated a great part of his life to astronomy becoming a consistent and meticulo…