Discovery of X-ray pulsations in SMC X-1

Details Discovery of X-ray pulsations in SMC X-1 Discovery of X-ray pulsations in SMC X-1

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206l..25l&link_type=abstract

Astrophysical Journal, vol. 206, May 15, 1976, pt. 2, p. L25-L28.

Computer Science

Sound

57

Magellanic Clouds, Pulsars, X Ray Sources, Binary Stars, Light Curve, Rocket Sounding, Satellite Observation, Time Response, X Ray Spectra

Scientific paper

Observations of SMC X-1 from an Aerobee rocket and an Apollo spacecraft have detected X-ray pulsations with a period of 0.716 s. The pulsed fraction in the 1.6-10-keV energy range is 25-35 percent. Evidence for significant pulse-shape and pulsed-fraction changes in the 0.6-1.6-keV range is also presented. The spectrum during both observations is fitted by a photon power law with a spectral index of -0.8 and normalization of 0.040.

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