An upper limit to an X-ray point source at the center of the Cygnus Loop

Details An upper limit to an X-ray point source at the center of the Cygnus Loop An upper limit to an X-ray point source at the center of the Cygnus Loop

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194l..71w&link_type=abstract

Astrophysical Journal, vol. 194, Dec. 1, 1974, pt. 2, p. L71-L74.

Astronomy and Astrophysics

Astrophysics

9

Point Sources, Radiant Flux Density, Supernova Remnants, X Ray Sources, Angular Resolution, Astronomical Models, Proportional Counters, Pulsed Radiation, X Ray Telescopes

Scientific paper

The Cygnus Loop was observed with a one-dimensional X-ray telescope. Data from two orthogonal scans showed no evidence for a pointlike remnant of the supernova at the center of the Loop. We set an upper limit to the presence of such a source of 2.9% (at 99.9% confidence) of the total emission in the bandwidth from 400 eV to 850 eV. The pulsed component at 62.31 msec suggested by Rappaport et al. (1973) was not observed.

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