Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Swift Follow-up Observations of INTEGRAL Sources of Unknown Nature   (Abridged) We made use of X-ray observations with the X-ray telescope
on-board the \swift observatory to refine the X-ray position to 3-5" accuracy
of 12 INTEGRAL sources, so as to further identify their counterpart at optical,
infrared, and radio wavelengths, to try to unveil their true nature. We then
searched the online catalogues (e.g. NED, SIMBAD, 2MASS, 2MASX, and NVSS) to
search for counterparts at other wavelengths. For all sources, we give a
refined X-ray position, provide X-ray spectral parameters, identify infrared
counterparts, and give magnitudes at optical and ultra violet wavelengths seen
with UVOT when observations are available. We confirm the nature of six sources
formerly suspected to be AGN (IGR J02343+3229, J13149+4422, J14579-4308,
J16385-2057, J18559+1535, J19378-0617). Our analysis first leads us to suggest
that IGR J09523-6231 and IGR J10147-6354 are AGN. While the former has recently
been confirmed as a Seyfert 1.5 AGN, we suggest the latter is a Seyfert 2. All
other sources may be Galactic sources, in which case their spectral shape may
suggest that they are X-ray binaries. In one case (IGR J19308+0530), the
Galactic nature is confirmed through the identification of an F8 star as the
counterpart. We favour a distance to the source not greater than 1 kpc. The
source is likely to be a neutron star XRB or a CV. We also report the discovery
of six serendipitous sources of unknown nature.

0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics