Quasi-periodic oscillations in GX 17 + 2

Details Quasi-periodic oscillations in GX 17 + 2 Quasi-periodic oscillations in GX 17 + 2

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..114p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, March 1, 1990, p. 114-125. Research supported by A

Astronomy and Astrophysics

Astronomy

29

Astronomical Spectroscopy, Galactic Bulge, Oscillations, X Ray Sources, Astronomical Observatories, Color-Color Diagram, Power Spectra, Radio Emission

Scientific paper

X-ray observations of GX 17 + 2 were made in March and April, 1988 with the Large Area Counter of the Ginga satellite. The source was observed in the flaring, normal, and horizontal branches. Quasi-periodic oscillations (QPOs) were oberved in all three of these branches. The relationship between QPO behavior and the X-ray spectral properties of GX 17 + 2 is examined. Continuous variation of QPO behavior is observed as GX 17 + 2 moves from the normal to flaring branch, indicating that the normal-branch QPO and the flaring-branch QPO are probably one physical phenomenon. This QPO behavior is similar to that observed in Sco X-1. Also, it is found that GX 17 + 2 is an example of the Z-type sources defined by Hasinger et al. (1989).

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