The Dust-Scattered Halo of OAO 1657-415 observed with ASCA

Details The Dust-Scattered Halo of OAO 1657-415 observed with ASCA The Dust-Scattered Halo of OAO 1657-415 observed with ASCA

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.2516a&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #25.16; Bulletin of the American Astronomical Society, Vol. 32, p.1222

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on two ASCA observations of OAO 1657-415. A short observation near mid-eclipse caught the source in a low-intensity state. A later, longer observation of the source in its high state covered the eclipse ingress through mid-eclipse. We find that the eclipse emission is dominated by a soft, spatially extended component whose intensity decreases through the eclipse. We attribute this to interstellar dust scattering. We use the decaying dust-scattered X-ray halo to place constraints on the nature of the interstellar dust and the distance to the source.

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