Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The broad-band properties of the XMM-Newton Bright Serendipitous Sources   We present here "The XMM-Newton Bright Serendipitous Survey", a survey
program conducted by the XMM-Newton Survey Science Center. In particular we
discuss the main goals of this project, we present the sample(s) and the
current optical breakdown and we discuss some broad band spectral properties as
derived from an hardness ratio analysis of the single sources. Finally we
report the 4.5--7.5 keV Log(N$>$S)-LogS for type 1 and type 2 AGN.

22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ