J/ApJS/143/25 Intermediate-luminosity X-ray objects catalog (Colbert+, 2002)
A catalog of candidate intermediate-luminosity X-ray objects.
Colbert E.J.M., Ptak A.F.
<Astrophys. J. Suppl. Ser. 143, 25 (2002)>
=2002ApJS..143...25C 2002ApJS..143...25C
ADC_Keywords: X-ray sources
Keywords: catalogs - galaxies: general - X-rays: binaries - X-rays: galaxies
Abstract:
ROSAT, and now Chandra, X-ray images allow studies of extranuclear
X-ray point sources in galaxies other than our own. X-ray observations
of normal galaxies with ROSAT and Chandra have revealed that
off-nuclear, compact, intermediate-luminosity
(LX[2-10keV]≥1039erg/s) X-ray objects (IXOs, a.k.a. ULXs
[ultraluminous X-ray sources]) are quite common. Here we present a
catalog and finding charts for 87 IXOs in 54 galaxies, derived from
all of the ROSAT HRI imaging data for galaxies with cz≤5000km/s from
the Third Reference Catalog of Bright Galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 75 87 ROSAT HRI IXO catalog
table2.dat 46 169 ROSAT HRI Detections of IXOs
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See also:
VII/155 : Third Reference Cat. of Bright Galaxies (RC3)
(de Vaucouleurs+ 1991)
IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000)
J/MNRAS/344/134 : Chandra ultraluminous X-ray sources (Humphrey+, 2003)
J/A+A/429/1125 : Ultraluminous X-ray sources catalog (Liu+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- IXO Intermediate-luminosity X-ray Object number
4- 5 I2 h RAh Hour of Right Ascension (J2000) (1)
7- 8 I2 min RAm Minute of Right Ascension (J2000) (1)
10- 13 F4.1 s RAs Second of Right Ascension (J2000) (1)
15 A1 --- DE- Sign of the Declination (J2000) (1)
16- 17 I2 deg DEd Degree of Declination (J2000) (1)
19- 20 I2 arcmin DEm Arcminute of Declination (J2000) (1)
22- 23 I2 arcsec DEs Arcsecond of Declination (J2000) (1)
25- 28 F4.1 [10-7W] logLX Log of the maximum 2-10 keV X-ray luminosity
in units of erg/s (2)
30- 40 A11 --- GName Galaxy Name
42- 46 F5.1 --- T-type Host galaxy type from RC3 (3)
48- 51 F4.1 --- A-type ? The AGN type (4)
53- 56 F4.1 [---] logFIR/B ? Log of the FIR to B-band flux (5)
58- 62 F5.2 Mpc Dist Distance
64 I1 --- r_Dist Distance reference (6)
66- 69 F4.1 kpc Rad Radius from nucleus (7)
71- 74 F4.1 kpc RMax Maximum radius allowed for inclusion (8)
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Note (1): X-ray position from ROSAT HRI data.
Note (2): Calculated from the ROSAT HRI count rate assuming a power-law spectrum
with Γ=1.7 (N(E)∝E^-Γ, N(E) in ph/keV/cm2/s)
and the Galactic hydrogen column from Table 2. We note that while a
soft X-ray luminosity (e.g., 0.2-2.4keV) is better matched to the
ROSAT HRI instrument than a hard 2-10keV luminosity, the latter is
better matched to current missions, such as CHANDRA and XMM.
For Γ=1.7, the 0.2-2.4keV unabsorbed luminosity is a factor of
0.89 times the 2-10keV luminosity listed here.
Note (3): Negative for E galaxies and positive for S galaxies.
Note (4): -1 means normal galaxy.
Note (5): FIR flux determined from IRAS measurements using the method of
Fullmer & Lonsdale (1989IRASG....c....F 1989IRASG....c....F). B-band fluxes were
extracted from NED.
Note (6): Distance reference:
1 = Assuming H0 is 75km/s/Mpc using recessional velocities
listed in RC3, Cat. VII/155;
2 = Nearby Galaxies Catalog, Tully (1988, Cat. VII/118);
3 = Paturel et al. (2002, Cat. J/A+A/383/398);
Note (7): Which was assumed to be at the RC3, Cat. VII/155, optical position.
Note (8): Equal to the 25mag/arcsec2 diameter from RC3, Cat. VII/155.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- IXO Intermediate-luminosity X-ray Object number
4- 15 A12 --- DNum The archive dataset number
16 A1 --- f_DNum [*] Flag on DNum (1)
18- 23 F6.2 10-3ct/s CRate ? HRI count rate
25- 28 F4.2 10-3ct/s e_CRate ? Error in CRate (2)
30- 34 F5.1 --- Sig ? Significance of detection (3)
36- 39 F4.1 [cm-2] NH ? Galactic hydrogen absorption column (4)
41- 45 F5.2 10+32W LX ? The 2-10keV X-ray luminosity in units of
1039erg/s (5)
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Note (1): * = Dataset name used for contour plot in Figures 1-15.
Note (2): From Gaussian plus sloping background model fits.
Note (3): Number of source counts divided by the square root of the number of
background counts in the source detection cell.
Note (4): From the FTOOLS NH program (Dickey & Lockman, 1990ARA&A..28..215D 1990ARA&A..28..215D).
Note (5): Estimated from the ROSAT HRI count rate and assuming a power-law
spectrum with Γ=1.7 and NH.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 19-Nov-2002