Observations of X-ray bursts from the vicinity of 3U1727-33

Details Observations of X-ray bursts from the vicinity of 3U1727-33 Observations of X-ray bursts from the vicinity of 3U1727-33

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..474m&link_type=abstract

Nature, vol. 262, Aug. 5, 1976, p. 474-476. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astronomy

14

Power Spectra, Radiant Flux Density, Spaceborne Astronomy, X Ray Sources, Ariel Satellites, Bursts, Crab Nebula, Orbital Mechanics, Periodic Variations, Phase Shift, Proportional Counters

Scientific paper

The region of sky near 3U1727-33 was observed Mar. 8-10 and Mar. 24-25, 1976, in the Ariel V experiment C, with the aid of a multiwire collimated proportional counter. The geometry of the experiment relative to the satellite spin axis is described. X-ray burst data from other satellites are compared with the Ariel V observations. Phases of bursts (with respect to folding period) are plotted against burst arrival times, power spectra of the data are constructed, and arrival times of bursts were folded on a period close to that obtained from the power spectra. Sequences of bursts (probably from burst source MXB1730-335) maintaining their phase and period for several cycles and then abruptly changing in either phase or period are discerned, in addition to bursts of longer duration followed by relatively quiescent intervals. The bursts are attributed to periodicity of an X-ray mechanism or orbital motion of an accretion disk.

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