The X-ray Dust Scattering Halo of 4U 1624-490

Details The X-ray Dust Scattering Halo of 4U 1624-490 The X-ray Dust Scattering Halo of 4U 1624-490

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0105x&link_type=abstract

American Astronomical Society, HEAD meeting #9, #1.05; Bulletin of the American Astronomical Society, Vol. 38, p.329

Astronomy and Astrophysics

Astronomy

Scientific paper

We present X-ray dust scattering halo results based on our 76ks Chandra ACIS-S / HETGS observation of the LMXB dipping source 4U 1624-490. Through analysis of the halo light curves, we estimate a geometric distance to the source to be 15kpc. Halo radial profiles are also fit against different ISM dust grain models to assess location, uniformity, and density. We also present a new method for assessing the Chandra PSF behavior at large (> 50") angles, through use of the time delays from the observed dips.

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