Spectral Variability in HER X-1

Details Spectral Variability in HER X-1 Spectral Variability in HER X-1

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18510215l&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #102.15; Bulletin of the American Astronomical Society, Vol. 26, p.1485

Astronomy and Astrophysics

Astronomy

Scientific paper

Here the entire set of Ginga observations of Her X-1 are analyzed. Light curves and softness ratios are used to study spectral changes which occur over the 35-day cycle of Hercules X-1. Color-intensity and color-color diagrams are used to distinguish the different spectral states in Her X-1. Spectral changes in the low-state are demonstrated. Evidence is presented that dips occur in two different spectral forms. Eclipse ingress, eclipse egress, normal dips, and the declining phases of the high-state and of the short-on all show similar spectral changes.

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