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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 75 87 ROSAT HRI IXO catalog table2.dat 46 169 ROSAT HRI Detections of IXOs
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
Bytes Format Units Label Explanations
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)
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). 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.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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)
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). Note (5): Estimated from the ROSAT HRI count rate and assuming a power-law spectrum with Γ=1.7 and NH.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 19-Nov-2002
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