A Swift Observation of the Neutron Star GX 13+1
ATel #1258; J. M. Miller, K. J. Perry (Michigan)
on 5 Nov 2007; 19:34 UT
Credential Certification: Jon Miller (jonmm@umich.edu)
Subjects: X-ray, Binary, Neutron Star
We report on an observation of the neutron star binary GX 13+1 made
with Swift. The windowed timing mode observation started on 2007
October 29 at 00:48:44 (TT) and lasted approximately 7 ksec. We
extracted events from the XRT, avoiding the peak of the image to
prevent photon pile-up.
Using XSPEC, we made spectral fits on the 1.0-10.0 keV band with a
model consisting of blackbody and disk blackbody components, modified
by absorption. We obtained the following values: NH = 1.6(1) E+22,
kT (blackbody) = 1.1(1) keV, and kT (disk blackbody) = 1.9 +/- 0.2
keV. Assuming a distance of 7.0 kpc (Smith, Edgar, & Shafer 2002),
this model gives a luminosity of 6.5 E+37 erg/s.
Below 1.0 keV, a strong soft excess is seen that is poorly fit with
standard models.
