The Digital Database of Long-Term Solar Chromospheric Variation

R Kitai; S Ueno; H Maehara; S Shirakawa; M Katoda; Y Hada; Y Tomita; H Hayashi; A Asai; H Isobe; H Goto; S Yamashita

doi:10.2481/dsj.WDS-037

Proceedings of the 1st WDS Conference in Kyoto 2011

The Digital Database of Long-Term Solar Chromospheric Variation

R Kitai, S Ueno, H Maehara, S Shirakawa, M Katoda, Y Hada, Y Tomita, H Hayashi, A Asai, H Isobe, H Goto, S Yamashita

Author information

R Kitai
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
S Ueno
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
H Maehara
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
S Shirakawa
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
M Katoda
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
Y Hada
Kwasan and Hida Observatories, Graduate School of Science, Kyoto University, Kyoto, Japan
Y Tomita
Department of Astrophysics, Graduate School of Science, Kyoto University, Kyoto, Japan
H Hayashi
Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan
A Asai
Unit for Synergetic Studies of Space, Kyoto University, Kyoto, Japan
H Isobe
Unit for Synergetic Studies of Space, Kyoto University, Kyoto, Japan
H Goto
The Kyoto University Museum, Kyoto University, Kyoto, Japan
S Yamashita
The Kyoto University Museum, Kyoto University, Kyoto, Japan

Keywords: Digital image database, Solar chromosphere, CaII K full disk image, UV irradiance

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2013 Volume 12 Pages WDS213-WDS215

DOI https://doi.org/10.2481/dsj.WDS-037

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Abstract

From 1926 to 1969, a long term solar full disk observation was done by Kyoto University. Daily, Ca II K (393.4 nm) spectroheliographic images and white light images were recorded on photographic plates. In this report, we will give the current status of our project to digitize all these images and to construct a database of these images for public use through the IUGONET system. In addition, we will discuss our perspective on the scientific analysis of the database by taking the solar CaII K brightness as a proxy measure of the solar UV irradiance on the terrestrial upper atmosphere.

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