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Detection of Solar Rotational Variability in the LYRA 190 - 222 nm Spectral Band
A. V. Shapiro, A. I. Shapiro, M. Dominique +4
We analyze the variability of the spectral solar irradiance during the period from 7 January, 2010 until 20 January, 2010 as measured by the Herzberg channel (190-222 nm) of the La…
Time delays in quasi-periodic pulsations observed during the X2.2 solar flare on 2011 February 15
L. Dolla, C. Marqué, D. B. Seaton +10
We report observations of quasi-periodic pulsations (QPPs) during the X2.2 flare of 2011 February 15, observed simultaneously in several wavebands. We focus on fluctuations on time…
New X-ray Detections of WNL Stars
Stephen L. Skinner, Svetozar A. Zhekov, Manuel Guedel +2
Previous studies have demonstrated that putatively single nitrogen-type Wolf-Rayet stars (WN stars) without known companions are X-ray sources. However, almost all WN star X-ray de…
Eclipses observed by LYRA - a sensitive tool to test the models for the solar irradiance
A. I. Shapiro, W. Schmutz, M. Dominique +1
We analyze the light curves of the recent solar eclipses measured by the Herzberg channel (200-220 nm) of the Large Yield RAdiometer (LYRA) onboard PROBA-2. The measurements allow…