The X-ray Halo of GX 13+1

Details The X-ray Halo of GX 13+1 The X-ray Halo of GX 13+1

2002-04-16

arxiv.org/abs/astro-ph/0204267v2

Astrophys.J. 581 (2002) 562-569

Astronomy and Astrophysics

Astrophysics

19 pages, 13 figures, accepted by ApJ. New PSF calibration data used which remove uncertainties in original paper; paper subst

Scientific paper

10.1086/344151

We present observations of the X-ray halo around the LMXB GX 13+1 from the Chandra X-ray telescope. The halo is caused by scattering in interstellar dust grains, and we use it to diagnose the line-of-sight position, size distribution, and density of the grains. Using the intrinsic energy resolution of Chandra's ACIS CCDs and the recent calibration observation of the Chandra point spread function (PSF), we were able to extract the halo fraction as a function of energy and off-axis angle. We define a new quantity, the ``halo coefficient,'' or the total halo intensity relative to the source at 1 keV, and measure it to be $1.5^{+0.5}_{-0.1}$ for GX 13+1. We find a relationship between this value and the dust size, density, and hydrogen column density along the line of sight to GX 13+1. We also conclude that our data does not agree with ``fluffy'' dust models that earlier X-ray halo observations have supported, and that models including an additional large dust grain population are not supported by these data.

Affiliated with

Also associated with

No associations

Rating

The X-ray Halo of GX 13+1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The X-ray Halo of GX 13+1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The X-ray Halo of GX 13+1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-10968