Photometric measurements of solar irradiance variations due to sunspots

Autor:	A. D. Herzog, John K. Lawrence, D. E. Laico, Gary A. Chapman, M. S. Templer
Rok vydání:	1989
Předmět:	Physics Sunspot Solar constant Starspot Irradiance Astronomy Astronomy and Astrophysics Astrophysics Solar irradiance Spectroheliograph Solar telescope law.invention Telescope Space and Planetary Science law
Zdroj:	The Astrophysical Journal. 343:547
ISSN:	1538-4357 0004-637X
DOI:	10.1086/167728
Popis:	A photometric telescope constructed to obtain photometric sunspot areas and deficits on a daily basis is described. Data from this Cartesian full disk telescope (CFDT) are analyzed with attention given to the period between June 4 and June 17, 1985 because of the availability of overlapping sunspot area and irradiance deficit data from high-resolution digital spectroheliograms made with the San Fernando Observatory 28 cm vacuum solar telescope and spectroheliograph. The CFDT sunspot deficits suggest a substantial irradiance contribution from faculae and active region plage.
Databáze:	OpenAIRE
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