Identification and analysis of structures in the corona from X-ray photography

  title={Identification and analysis of structures in the corona from X-ray photography},
  author={Giuseppe Salvatore Vaiana and Allen S. Krieger and Adrienne F. Timothy},
  journal={Solar Physics},
This paper summarizes the results of a program of rocket observations of the solar corona with grazing incidence X-ray telescopes. A series of five flights of a Kanigen-surfaced telescope with a few arc seconds resolution, together with the first flight of a newer telescope have resulted in the identification of six classes of coronal structures observable in the X-ray photographs. These are: active regions, active region interconnections, large loop structures associated with unipolar magnetic… 
Analysis of X-ray observations of the 15 June 1973 flare in active region NOAA 131
Observations and analyses of the 1B/M3 flare of 15 June, 1973 in active region NOAA 131 (McMath 12379) are presented. The X-ray observations, consisting of broadband photographs and proportional
Time Variations of Solar X-Ray Bright Points
An example of the overall view of the X-ray corona (nominal filter pass-band 2–32 A and 44–54 A) showing a coronal hole, filament activity, bright points and the large scale-scale loop structures, is
A comparison of coronal X-ray structures of active regions with magnetic fields computed from photospheric observations
The appearances of several X-ray active regions observed on March 7, 1970 and June 15, 1973 are compared with the corresponding coronal magnetic field topology. Coronal fields have been computed from
X-Ray and microwave observations of active regions
We compare coordinated, high spatial resolution (2–3 arc sec) observations at 6 cm and in soft X-rays with photospheric magnetograms and optical filtergrams of two active regions. The correspondence
Analysis and interpretation of soft X-ray photographs of coronal active regions taken with Fresnel zone plates
Soft X-ray photographs of the Sun taken at O vii 21.6 Å and in a spectral band ranging from 13.2 to 22.1 Å have been analysed in order to establish spatially resolved maps of temperature and emission
A Discussion on the physics of the solar atmosphere - The x-ray corona from Skylab
  • G. Vaiana
  • Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1976
An overview of the images obtained with the A.S. & E. X-ray telescope on Skylab shows the low corona to be highly structured. The plasma is distributed in closed loops shaped by the magnetic field
Coronal-Temperature-Diagnostic Capability of the Hinode/X-Ray Telescope Based on Self-Consistent Calibration
The X-Ray Telescope (XRT) onboard the Hinode satellite is an X-ray imager that observes the solar corona with unprecedentedly high angular resolution (consistent with its 1″ pixel size). XRT has nine
The analysis and interpretation of solar X-ray photographs
This paper discusses the methods used to analyse and interpret X-ray filtergrams obtained by solar soft X-ray telescopes such as the S-056 Skylab instrument. First, an appropriate definition of the
Configuration and gradual dynamics of prominence-related X-ray coronal cavities
We have analyzed X-ray images of the solar corona obtained by the S-054 telescope on Skylab, together with Hα filtergrams from the Catania Astrophysical Observatory and EUV and magnetic data, to


A glancing incidence solar telescope for the soft x-ray region
This paper describes the instrumentation of an Aerobee rocket (NASA 4.95 GS) which was launched from White Sands Missile Range on May 20th 1966, to observe the Sun in the soft X-ray region. The
X-ray Structures of the Sun during the Importance 1N Flare of 8 June 1968
High-resolution solar x-ray images were obtained with a rocket-borne grazing incidence telescope, and the general coronal emission at the limb and several faint regions on the disc are observed.
Interpretation of X-Ray Photograph of the Sun.
An x-ray picture of the sun was obtained on April 19, 1960, using pinhole-camera photography. Photometric analysis of the picture has shown that at least 75 per cent of the x radiation passed by the
A coronal hole and its identification as the source of a high velocity solar wind stream
X-ray images of the solar corona, taken on November 24, 1970, showed a magnetically open structure in the low corona which extended from N20W20 to the south pole. Analysis of the measured X-ray
Soft X-ray (3–60 A) photographs of the solar corona have been obtained on four flights of a rocket-borne grazing incidence telescope having a resolution of a few arc seconds. The configuration of the
Evolution of coronal helmets during the ascending phase of solar cycle 20
The principal polar-crown coronal helmet structures were selected from nearly three years (May, 1965–January, 1968) of K-coronameter observations made at Haleakala and Mauna Loa, Hawaii. Six isolated
Study of X-ray images of the sun at solar minimum.
Solar X ray images obtained at solar minimum by grazing-incidence optics, noting X ray radiation spatial distribution is consistent with coronal emission models
X-ray Photographs of the Sun on March 7, 1970
The Sun was photographed from an Aerobee rocket by means of equipment responding to the wavelength interval 3–60 Å, revealing interesting relationships between structures in the corona.
Radiation from a high-temperature, low-density plasma - The X-ray spectrum of the solar corona
Solar coronal X ray spectrum calculation of high- temperature low-density plasma, considering line emission from electron collisional excitation and radiation
Solar X-ray photographs, describing Aerobee rocket mounted telescope using grazing incidence optics