Sub-arcsecond observations of the solar X-ray corona

  title={Sub-arcsecond observations of the solar X-ray corona},
  author={Leon Golub and Marc Herant and Kenneth Kalata and Istvan Lovas and George U. Nystrom and Francined Pardo and Eberhard Spiller and J. S. Wilczynski},
SOFT X-ray observations are recognized as the best way to study the solar corona, as they are largely free of contaminating emission from other temperature regimes. They provide the only available method for seeing the corona on the disk, thereby avoiding the line-of-sight integration effects which are troublesome in limb observations. Here we present results from a high-resolution multilayer-coated X-ray imaging telescope, part of the Normal Incidence X-ray Telescope sounding rocket payload… 
The Structure of the Solar Corona above Sunspots as Inferred from Radio, X-Ray, and Magnetic Field Observations
We present observations of a solar active region, NOAA/USAF no. 7123, during 1992 April 3-10. The database includes high-angular-resolution radio, soft X-ray, magnetograph, and Hα observations. The
A Spatially Resolved X-ray Image of a Star Like the Sun
Observations made with the ROSAT (Roentgen Satellite) have produced the first spatially resolved x-ray image of a corona around a star like the authors' sun, indicating a highly asymmetric x-Ray intensity distribution on the surface of the G star.
Pressure diagnostics of coronal loops observed by NIXT
The Normal Incidence X-ray Telescope (NIXT sounding rocket payload — a set of multilayer telescopes of novel design — provides images of the corona at sub-arcsec angular resolution in narrow X-ray
The Solar X-ray Corona
The X-ray emission from the Sun reveals a very dynamic hot atmosphere, the corona, which is characterized by a complex morphology and broad range of timescales of variability and spatial structuring.
Quasi-stereoscopic imaging of the solar X-ray corona
The first published three-dimensional images of the solar X-ray corona, obtained by means of solar rotational parallax, are presented in stereographic form. Image pairs approximately 12 hours apart
High Resolution Thermally Differentiated Images of the Chromosphere and Corona
The development of optical coatings composed of multilayers engineered on atomic scales, which can efficiently and selectively reflect soft X-ray, EUV, and FUV radiation, has significant implications
Imaging performance and tests of soft x-ray telescopes
Photos obtained during 5 mm. of observation time from the flight of our 10 inch normal incidence soft x-ray (1 = 63.5A) telescope on September 11, 1989 are analyzed and the data are compared to the
Observations of the Sun at Vacuum- Ultraviolet Wavelengths from Space. Part I: Concepts and Instrumentation
Studies of the high-temperature solar atmosphere are to a large extent based on spectroscopic observations of emission lines and continuum radiation in the vacuum-ultraviolet (VUV) wavelength range


Construction Of A Multilayered X-Ray Telescope For Solar Coronal Studies From Space
We discuss the construction and flight of an ultrahigh resolution soft x-ray telescope which is to be flown on a NASA sounding rocket in 1986. The possibility of using normal incidence figured optics
X-ray bright points and the solar cycle
  • L. Golub
  • Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1980
Soft X-ray filtergrams show the presence on the Sun of large numbers of small, closed regions of coronal emission. These features, called 'X-ray bright points' correspond to small, short-lived
A Multilayer X-Ray Mirror For Solar Photometric Imaging Flown On A Sounding Rocket
We discuss the flight of a multilayer-coated mirror on a sounding rocket experiment on March 17, 1988, which was used to obtain photometric images of the Sun just prior to solar eclipse. This 1.5"
Heating of coronal plasma by anomalous current dissipation. [induced by solar magnetic flux
We show that the observed high temperature and inhomogeneous structure of the solar corona, as well as the long-term spatial and temporal evolution of coronal features, is economically explained by
Fabrication and testing of large area multilayer coated x-ray optics.
Methods which are generally useful for characterizing the performance of multilayer x-ray mirrors on large figured optical surfaces are presented and specific results from the production of a 25-cm diam Ritchey-Chretien telescope for a wavelength of lambda = 63.5 A.
X-ray Photographs of a Solar Active Region with a Multilayer Telescope at Normal Incidence
An astronomical photograph was obtained with a multilayer x-ray telescope, and Coronal Si-XII emission from an active region was recorded on film; the structure is very similar to that observed at O-VIII wavelengths by the Solar Maximum Mission flat crystal spectrometer at the same time.