Solar X-Ray Source Unassociated with Sunspots

Extract

On October 3, 1970 the astrophysical rocket observatory K-2 was launched from the Soviet Union, designed to investigate the Sun in the region of short- and X-ray waves Gurzadyan et al. (1971). During the launching a series of X-ray pictures of the Sun was received, in the period 04 h 22 min to 04 h 30 min universal time, through an aluminum foil 5000 Å thick, covering a polistriol film 1000 Å thick. The pictures were taken by means of a pinhole camera under the following conditions: the focal length was 150 mm, the angular resolution – from 8’ to 0.’92, which corresponds to the dimensions of the input diaphragm from 0.28 mm to 0.04 mm, effective exposure – 520s, the pointing accuracy by a stabilised platform carrying the instruments – 0.′7-0.′8. The picture was taken by a film of the UF-R type (Kalinkina et al, 1965).