The Sun's X-ray Emission During the Recent Solar Minimum

Details The Sun's X-ray Emission During the Recent Solar Minimum The Sun's X-ray Emission During the Recent Solar Minimum

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010eostr..91...73s&link_type=abstract

Eos, Transactions American Geophysical Union, Volume 91, Issue 8, p. 73-74

Astronomy and Astrophysics

Astrophysics

5

Solar Physics, Astrophysics, And Astronomy: Corona, Solar Physics, Astrophysics, And Astronomy: X-Rays, Gamma Rays, And Neutrinos, Solar Physics, Astrophysics, And Astronomy: Instruments And Techniques, Solar Physics, Astrophysics, And Astronomy: Stellar Astronomy, Solar Physics, Astrophysics, And Astronomy: Solar Irradiance

Scientific paper

The Sun recently underwent a period of a remarkable lack of major activity such as large flares and sunspots, without equal since the advent of the space age a half century ago. A widely used measure of solar activity is the amount of solar soft X-ray emission, but until recently this has been below the threshold of the X-ray-monitoring Geostationary Operational Environmental Satellites (GOES). There is thus an urgent need for more sensitive instrumentation to record solar X-ray emission in this range. Anticipating this need, a highly sensitive spectrophotometer called Solar Photometer in X-rays (SphinX) was included in the solar telescope/spectrometer TESIS instrument package on the third spacecraft in Russia's Complex Orbital Observations Near-Earth of Activity of the Sun (CORONAS-PHOTON) program, launched 30 January 2009 into a near-polar orbit. SphinX measures X-rays in a band similar to the GOES longer-wavelength channel.

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