Observations of sub-millisecond bursts from Cygnus X-1

Details Observations of sub-millisecond bursts from Cygnus X-1 Observations of sub-millisecond bursts from Cygnus X-1

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..721g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, June 1981, p. 721-731.

Computer Science

Sound

10

Rocket Sounding, Spaceborne Astronomy, X Ray Sources, Autocorrelation, Bursts, High Resolution, Rocket Flight, Time Response

Scientific paper

Cygnus X-1 was observed by a powerful X-ray rocket payload on 1976 November 4 and several sub-millisecond bursts were found. These bursts when superimposed imply a rising profile with a width of about 500 microsec, but a high resolution autocorrelation function shows this time-scale is not characteristic of the source. The problems involved in demonstrating the existence of ms bursts are discussed and the bursts seen are then compared with the few previously reported examples. This comparison shows that all observations to date have been made with detectors that are too small in area to escape entirely from the realm of small numbers and their associated statistical problems.

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