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J/ApJS/154/519   Properties of ultraluminous X-ray candidates    (Swartz+, 2004)
The ultraluminous X-ray source population from the Chandra archive of galaxies.
    Swartz D.A., Ghosh K.K., Tennant A.F., Wu K.
   <Astrophys. J. Suppl. Ser., 154, 519-539 (2004)>
   =2004ApJS..154..519S
ADC_Keywords: X-ray sources

Keywords: galaxies: general - surveys - X-rays: binaries - X-rays: galaxies -
          X-rays: general

Abstract:
    One hundred fifty-four (actually 155) discrete non-nuclear
    ultraluminous X-ray (ULX) sources, with spectroscopically determined
    intrinsic X-ray luminosities greater than 1039erg/s, are identified
    in 82 galaxies observed with Chandra's Advanced CCD Imaging
    Spectrometer (ACIS). Source positions, X-ray luminosities, and
    spectral and timing characteristics are tabulated.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       121      155   Properties of ULX Candidates


See also:
  J/MNRAS/344/134 : Chandra ultraluminous X-ray sources (Humphrey+, 2003)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units      Label     Explanations

   1-  8  A8    ---        Name      Galaxy name
  10- 11  I2    h          RAh       Hour of Right Ascension (J2000)
  13- 14  I2    min        RAm       Minute of Right Ascension (J2000)
  16- 20  F5.2  s          RAs       Second of Right Ascension (J2000)
      22  A1    ---        DE-       Sign of the Declination (J2000)
  23- 24  I2    deg        DEd       Degree of Declination (J2000)
  26- 27  I2    arcmin     DEm       Arcminute of Declination (J2000)
  29- 32  F4.1  arcsec     DEs       Arcsecond of Declination (J2000)
  34- 37  F4.2  ---        Gamma     Power-law index
  39- 42  F4.2  ---        E_Gamma   Upper limit error on Gamma
  44- 48  F5.2  ---        e_Gamma   Lower limit error on Gamma
      50  A1    ---        n_Gamma   [bc] Note on Gamma (1)
  52- 56  F5.2  10+22/cm2  NH        Hydrogen column density
  58- 61  F4.2  10+22/cm2  E_NH      Upper limit error on NH
  63- 66  F4.2  10+22/cm2  e_NH      Lower limit error on NH
  68- 73  F6.2  ---        chi2      Model fit χ2
  75- 77  I3    ---        DOF       Model degree of freedom
  79- 83  F5.2  10+32W     OLum      Observed luminosity in units of
                                     1039erg/s
  85- 88  F4.2  10+32W     e_OLum    Uncertainty in OLum
  90- 94  F5.2  10+32W     ILum      Intrinsic luminosity in units of
                                     1039erg/s
  96-100  F5.2  10+32W     e_ILum    Uncertainty in ILum
     102  A1    ---        f_ILum    [d] Flag on ILum (2)
 104-108  F5.2  ---        (H-M)/T   (2.0-8.0keV)-(1.0-2.0keV) relative to the
                                      total counts (3)
 110-114  F5.2  ---        (M-S)/T   (1.0-2.0keV)-(0.5-1.0keV) relative to the
                                     total counts (3)
 116-120  F5.3  ---        P-KS      Kolomogorov-Smirnov significance that the
                                     source deviates from the steady source
                                     hypothesis

Note (1): The symbols mean the following:
    b = Disk-blackbody model inner disk temperature, kTin, in keV.
    c = Thermal emission-line model temperature, kT, in keV.
Note (2): Flag on ILum
    d = Intrinsic luminosity <1039ergs/s when fit using a thermal
        emission-line model.
Note (3): Colors are defined as background-substracted X-ray counts defined as:
    S(0.5-1.0 keV), M(1.0-2.0 keV), H(2.0-8.0 keV)
    and T=S+M+H


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    04-Feb-2005