Solar gamma-, X-, and EUV radiation : [proceedings of a symposium] held in Buenos Aires, Argentina, 11-14 June 1974, organized by the IAU in cooperation with COSPAR

Proceedings of IAU Symposium No. 68 held in Buenos Aires, Argentina, 11-14 June 1974, organized by the IAU in co-operation with COSPAR Front Matter....Pages I-XII Front Matter....Pages 1-1 EUV Observations of the Active Sun from the Harvard Experiment on ATM....Pages 3-17 Holes in the Solar Corona....Pages 19-21 Time Variations of Solar X-Ray Bright Points....Pages 23-24 Solar Activity Observed in X-Rays and the EUV from OSO 7....Pages 25-42 Front Matter....Pages 43-43 X-Ray Spectra of Solar Active Regions....Pages 45-64 X-Ray Spectroscopy of Solar Active Regions during the Third Skylab Mission....Pages 65-66 Spatially Resolved X-Ray Spectra of Coronal Active Regions....Pages 67-67 Classification of New Spectral Lines of Fe xvii Observed in Solar Active Regions....Pages 69-70 Statistical Methods in the Identification and Prediction of the Solar X-Ray Spectral Lines....Pages 71-72 Interpretation of the X-Ray Spectra of Solar Active Regions....Pages 73-100 Soft X-Radiation from Single Active Regions....Pages 101-102 Time Variations in Coronal Active Regions....Pages 103-103 Flare-Like Ultraviolet Spectra of Active Regions....Pages 105-107 The Structure of Solar Active Regions from EUV and Soft X-Ray Observations....Pages 109-131 Front Matter....Pages 133-133 Ultraviolet Emission Line Profiles of Flares and Active Regions....Pages 135-151 Fe xxiv Emission in Solar Flares Observed with the NRL/ATM XUV Slitless Spectrograph....Pages 153-163 X-Ray and EUV Spectra of Solar Flares and Laboratory Plasmas....Pages 165-181 Association of X-Ray Flares with Solar Coronal Active Regions....Pages 183-183 Studies of the Dynamic Structure and Spectra of Solar X-Ray Flares....Pages 185-185 On the Thermal Structure of the Flare-Produced Plasma....Pages 187-189 Front Matter....Pages 133-133 The Relationship between Hard and Soft X-Ray Bursts Observed by OSO 7....Pages 191-208 Relationship between Hard and Soft Solar X-Ray Sources Observed by OSO-7....Pages 209-209 Thermal and Nonthermal Interpretations of Flare X-Ray Bursts....Pages 211-231 High Time Resolution Analysis of Solar Flares Observed on the ESRO TD-1A Satellite....Pages 233-235 Rise Time of Hard X-Ray Bursts....Pages 237-238 Determination of the Height of Hard X-Ray Sources in the Solar Atmosphere by Measurement of Photospheric Albedo Photons....Pages 239-241 Inference of the Hard X-Ray Source Dimensions in the 1972, August 7 White Light Flare....Pages 243-243 The Interpretation of Spectra, Polarization, and Directivity of Solar Hard X-Rays....Pages 245-282 Solar Flare X-Ray Measurements and their Relation to Microwave Bursts....Pages 283-297 Relation of Microwave Emission to X-Ray Emission from Solar Flares....Pages 299-313 X- and γ-Ray Measurements during the 1972, August 2 and 7 Large Solar Flares....Pages 315-339 High Energy Gamma-Ray Radiation above 300 keV Associated with Solar Activity....Pages 341-359 Measurements of a Gamma-Ray Burst above 1 MeV....Pages 361-361 Gamma-Ray Lines from Solar Flares....Pages 363-383 Fast Electrons in Small Solar Flares....Pages 385-409 Nuclei of Heavy Elements from Solar Flares....Pages 411-421 Implications of NRL/ATM Solar Flare Observations on Flare Theories....Pages 423-424 Nonthermal Processes in Large Solar Flares....Pages 425-426 On the Acceleration Processes in Solar Flares....Pages 427-439 The symposium on 'Solar Gamma-, X- and EUV Radiation' was held at Buenos Aires, Argentina, from 11 June to 14 June 1974. It was sponsored jointly by the Inter national Astronomical Union (IAU) and the Committee on Space Research (COSPAR). The Organization Committee responsible for the program consisted of Drs K.A. Anderson (Chairman), J.L. Culhane, G. Elwert, B.B. Fossi, S.L. Mandel s'tam, W.M. Neupert, V.K. Prokofiev, and J. Sahade and representatives of COSPAR, Drs H. Friedman and Z. Svestka. During the symposium Dr Svestka kindly represented the chairman of the Organizing Committee who was unable to attend the symposium. The local arrangements in Buenos Aires were made by Drs J. Sahade (Chairman), H.S. Ghielmetti, M.J. Gulich, H. Molnar, J.J. Tasso and N. Martinez Riva de Tropper. This symposium brought together the observational and theoretical aspects of the Solar Gamma-, X-, and EUV Radiation and other related solar emissions such as radio and energetic particles. There were three specific topics for the symposium, viz