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Browsing by Author "Pevtsov, A. A"

Browsing by Author "Pevtsov, A. A"

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  • A century of solar Ca ii measurements and their implication for solar UV driving of climate 
    Foukal, P; Bertello, L; Livingston, W. C; Pevtsov, A. A; Singh, J; Tlatov, A. G; Ulrich, R. K (Springer, 2009-04)
    Spectroheliograms and disk-integrated flux monitoring in the strong resonance line of Ca ii (K line) provide the longest record of chromospheric magnetic plages. We compare recent reductions of the Ca ii K spectroheliograms ...
  • A new method of calibration of photographic plates from three historic data sets 
    Tlatov, A. G; Pevtsov, A. A; Singh, J (Springer, 2009-04)
    We analyze the synoptic data taken in the Ca ii K spectral line with spectroheliographs at Kodaikanal Observatory from 1907 to 1999, at Mount Wilson Observatory from 1915 to 1985, and at the National Solar Observatory at ...
  • Temperature variability in X-ray bright points observed with Hinode/XRT 
    Kariyappa, R; DeLuca, E. E; Saar, S. H; Golub, L; Dam´e, L; Pevtsov, A. A; Varghese, B. A (EDP Science, 2011-02)
    Aims. Our aim is to investigate the variability in the temperature as a function of time among a sample of coronal X-ray bright points (XBPs). Methods. We analysed a 7-hour (17:00 UT - 24:00 UT) long time sequence of ...

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