A catalog of X-ray point sources in the Abell 133 region
  As an evolutionary phase of galaxies, active galactic nuclei (AGN) over a
large range of redshift have been utilized for understanding cosmic evolution.
In particular, the population and evolution of AGNs have been investigated
through the study of the cosmic X-ray background in various fields. As one of
the deep fields observed by Chandra with a total of 2.8 Msec exposures, Abell
133 is a special region to investigate AGNs, providing a testbed for probing
the environmental effect on AGN trigger, since cluster environments can be
different from field environments. The achieved flux limit of data at 50%
completeness level of 6.95x10^(-16), 1.43x10^(-16), and 1.57x10^(-15) ergs
cm^(-2) in 0.5-8, 0.5-2, and 2-8 keV. Using the wavdetect and no-source
binomial probability (i.e., p<0.007), we analyze the combined \textit{Chandra}
image, detecting 1617 (in 0.5-8 keV), 1324 (in 0.5-2 keV), and 1028 (in 2-8
keV), X-ray point sources in the Abell 133 region. Here, we present the X-ray
point source catalogue with the source fluxes, which can be combined with
multiwavelength data for future works. We find that the number count
distribution of the X-ray point sources is well reproduced with a broken
power-law model while the best-fit model parameters are sensitive to the
fitting range of the number count distribution. Finally, we find an excess of
the number density (decrease of AGN fraction) at the central region of the
cluster, which reflects the effect of dense environments on AGN trigger, as
similarly found in studies of other galaxy clusters.
