The hard X-ray periodicity of GX 1 + 4

Details The hard X-ray periodicity of GX 1 + 4 The hard X-ray periodicity of GX 1 + 4

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239l..57k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 239, July 15, 1980, p. L57-L60.

Astronomy and Astrophysics

Astrophysics

15

Milky Way Galaxy, Periodic Variations, X Ray Sources, Galactic Nuclei, Galactic Structure, Light Curve

Scientific paper

Pulses that recur with a 4.27 + or - 0.01 minute period were detected on April 2, 1974 in the 20-64 keV X-radiation from the galactic center region. Apparently emanating from GX 1 + 4, a major contributor to the high-energy radiation from that region, the pulses were 1.25 + or - 0.42 minutes in duration. If it is in fact the same source that has been observed on all occasions, the period is twice that previously believed.

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