X-ray and radio observations of GX 17+2 and GX 13+1

Details X-ray and radio observations of GX 17+2 and GX 13+1 X-ray and radio observations of GX 17+2 and GX 13+1

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..600w&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Mar. 1, 1978, p. 600-605. Research supported by the Science Research Council and Lockh

Astronomy and Astrophysics

Astronomy

25

Galactic Radiation, Radio Observation, Satellite Observation, X Ray Sources, Luminous Intensity, Oao 3, Periodic Variations, Radio Emission, Radio Sources (Astronomy), Spaceborne Astronomy, X Ray Spectra

Scientific paper

X-ray data on the sources 3U 1813-14 (GX 17+2) and 3U 1811-17 (GX 13+1), obtained by Copernicus between 1975 and 1977, are examined. These reveal correlated intensity and spectral-slope variations in GX 17+2 similar to those seen in Sco X-1 and four other galactic sources, 3U 0614+09, 3U 1702-36, 3U 1728-16, and 3U 1758-25. The data on GX 17+2 have been unsuccessfully searched for further evidence of a shallow 31.9-minute modulation. In the case of GX 13+1 no significant variability was seen in either intensity or spectrum. A simultaneous search made from the NRAO simultaneously with some of the X-ray observations revealed no significant radio emission from either source.

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