ULXRBCAT - Ultraluminous X-Ray Sources in External Galaxies Catalog
A catalogue of ultraluminous X-ray sources in external galaxies. Liu Q.Z., Mirabel I.R. <Astron. Astrophys. 429, 1125 (2005)> =2005A&A...429.1125L (SIMBAD/NED BibCode)
The ultraluminous X-Ray source designation.
An alternative name for the ULX which has been previously used in the literature.
The Right Ascension of the ULX in the selected equinox. This was given in J2000 coordinates and with a typical precision of 0.1 seconds of time in the original table.
The Declination of the ULX in the selected equinox. This was given in J2000 coordinates and with a typical precision of 0.1 - 1 arcsecond in the original table.
The Galactic Longitude of the ULX.
The Galactic Latitude of the ULX.
The peak X-ray luminosity of the ULX, in erg/s, in the energy range specified by the lower_energy and upper_energy parameters.
The lower limit of the energy range, in keV, corresponding to the quoted X-ray luminosity.
The upper limit of the energy range, in keV, corresponding to the quoted X-ray luminosity.
The nuclear offset of the ULX, in arcseconds, i.e., the radial location of the ULX measured from the galaxy center, assuming that its nucleus is at the RC3 (CDS Catalog VII/155) optical position.
Only strong X-ray sources with enough X-ray counts have X-ray spectral fits. This parameter contains the type(s) of spectral model which gave the best-fit to recent X-ray observations of the ULX, where the following abbreviations have been used (if a two-component fit was needed, the '+' symbol is used between the two fit models):
PL: power-law model BB: blackbody MCD: multicolor disk (Mitsuda et al., 1984PASJ...36..741M) MKL: MEKAL BR: bremsstrahlung RS: Raymond-Smith thermal model (Raymond & Smith 1977ApJS...35..419R)
Only strong X-ray sources with enough X-ray counts have X-ray spectral fits. This parameter contains the best-fit model parameters, giving the spectral index value for a power-law fit, and the inner temperature in keV for a Thermal Model Fit. If a two-component fit was needed, the '+' symbol is used between the fit values for the two components.
The designation of the host galaxy of the ULX.
An alternative name for the host galaxy of the ULX.
The Hubble classification type for the host galaxy of the ULX, taken from the RC3.
The morphological 't' type of the host galaxy of the ULX, taken from the RC3, where -5 is the value for an elliptical galaxy, 0 for an S0a galaxy, and 10 for a Magellanic-type irregular galaxy, etc.
The morphological 't' type of the second galaxy, when the ULX is located in a pair of galaxies.
The distance to the host galaxy, in megaparsecs (Mpc). This was extracted from the Nearby Galaxies Catalog of Tully (1988) if the recessional velocity listed in the RC3 was less than 1000 km/s, otherwise it was computed by the authors from the recessional velocity using a Hubble Constant value of 75 km/s/Mpc.
The galactic Hydrogen column density in units of atoms/cm2, taken from Dickey & Lockman (1990ARA&A..28..215D).
An upper value for the galactic Hydrogen column density, in atoms/cm2, when a range of values was given for this parameter.
The B-band photographic magnitude of the ULX's host galaxy, taken from the RC3.
The B magnitude of the second galaxy, if the ULX is located in a pair of galaxies.
The near-infrared Ks magnitude of the ULX's host galaxy, calculated from the 20 mag/arcsec2 ispohotal magnitude listed in the 2MASS Large Galaxy Atlas of Jarrett et al.(2003, = 2003AJ....125..525J).
The Ks magnitude of the second galaxy, if the ULX is located in a pair of galaxies.
The far-infrared magnitude M(FIR) of the ULX's host galaxy, calculated from the relation M(FIR) = -20.0 - 2.5 * log F(FIR), where F(FIR) is the far-infrared continuum flux measured at 60 and 100 microns as listed in the IRAS Point Source Catalog (CDS Catalog II/125).