Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: XMM-Newton EPIC observations of Her X-1   We present spin-resolved X-ray data of the neutron star binary Her X-1. We
find evidence that the Iron line at 6.4 keV originates from the same location
as the blackbody X-ray component. The line width and energy varies over both
the spin period and the 35 day precession period. We also find that the
correlation between the soft and hard X-ray light curves varies over the 35 day
period.

15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
3
The categories of this paper are: physics