SIMBAD references

In this paper we present the source list for three Chandra observations of the Local Group galaxy M33. The observations are centered on the nucleus and on the star-forming region NGC 604. We detect a total of 261 sources in an area of ∼0.2 deg² down to a flux limit of 3x10^–16 ergs/s/cm2, which corresponds to a luminosity of ∼2x10³⁴ ergs/s at a distance of 840 kpc. From the source list we construct the luminosity functions of sources observed in M33. If we take into account background contamination, the luminosity functions are consistent with those of other star-forming galaxies. In addition, the combination of X-ray color analysis and the existence of ``blue'' optical counterparts strongly indicates that the X-ray point-source population in M33 consists of young objects. Above 3x10³⁵ ergs/s there are few X-ray sources in the locus of the X-ray hardness ratio diagram that is generally populated by low-mass X-ray binaries.