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J/ApJ/602/231   Chandra X-ray point sources in nearby galaxies  (Colbert+, 2004)

Old and young X-ray point source populations in nearby galaxies. Colbert E.J.M., Heckman T.M., Ptak A.F., Strickland D.K., Weaver K.A. <Astrophys. J., 602, 231-248 (2004)> =2004ApJ...602..231C
ADC_Keywords: Galaxies, nearby ; X-ray sources ; Binaries, X-ray Keywords: X-rays: binaries - X-rays: galaxies Abstract: We have analyzed Chandra ACIS observations of 32 nearby spiral and elliptical galaxies and present the results of 1441 X-ray point sources that were detected in these galaxies. The total point-source X-ray (0.3-8.0keV) luminosity LXP is well correlated with the B-band, K-band, and FIR+UV luminosities of spiral host galaxies and is well correlated with the B-band and K-band luminosities of elliptical galaxies. This suggests an intimate connection between LXP and both the old and young stellar populations, for which K and FIR+UV luminosities are reasonable proxies for the galaxy mass M and star formation rate SFR. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 65 32 Observational Data table2.dat 74 32 Galaxy Properties tablea1.dat 98 1441 Properties of the X-ray Point Sources
See also: B/chandra : The Chandra Archive Log (CXC, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Galaxy name 12- 20 A9 --- OName Other name 21- 24 I4 --- ObsID Chandra observation ID 27 I1 --- CCD1 ACIS CCD number in galaxy field of view for which point sources were detected. 28 A1 --- --- [/] 29 I1 --- CCD2 ? ACIS CCD number in galaxy field of view for which point sources were detected. 30 A1 --- --- [/] 31 I1 --- CCD3 ? ACIS CCD number in galaxy field of view for which point sources were detected. 32 A1 --- --- [/] 33 I1 --- CCD4 ? ACIS CCD number in galaxy field of view for which point sources were detected. 34 A1 --- --- [/] 35 I1 --- CCD5 ? ACIS CCD number in galaxy field of view for which point sources were detected. 37- 40 F4.1 ks ExpTime1 Exposure time for CCD1 41 A1 --- --- [/] 42- 45 F4.1 ks ExpTime2 ? Exposure time for CCD2 46 A1 --- --- [/] 47- 50 F4.1 ks ExpTime3 ? Exposure time for CCD3 51 A1 --- --- [/] 52- 55 F4.1 ks ExpTime4 ? Exposure time for CCD4 56 A1 --- --- [/] 57- 60 F4.1 ks ExpTime5 ? Exposure time for CCD5 63- 65 I3 --- NX-ray Number of X-ray point sources detected within galaxy field of view
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Galaxy name 12- 15 F4.1 Mpc Dist Distance 17- 30 A14 --- MType Morphological type 31- 39 A9 --- AGN AGN type 41- 44 F4.1 [10-7W] logLB B-band luminosity 46- 49 F4.1 [10-7W] logLK K-band luminosity 51 A1 --- l_logLFIR Limit flag on logLFIR 52- 55 F4.1 [10-7W] logLFIR Far-IR luminosity 57- 60 F4.1 [10-7W] logLUV UV luminosity 62 A1 --- l_LFIR/LB Limit flag on LFIR/LB 63- 68 F6.4 --- LFIR/LB FIR to B band luminosity ratio 70 A1 --- l_LFIR+UV/LK Limit flag on LFIR+UV/LK 71- 74 F4.2 --- LFIR+UV/LK FIR+UV to B-band luminosity ratio
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Host Galaxy NGC number (see Table 1) 12- 13 I2 h RAh Hour of Right Ascension (J2000) 15- 16 I2 min RAm Minute of Right Ascension (J2000) 18- 21 F4.1 s RAs Second of Right Ascension (J2000) 23 A1 --- DE- Sign of the Declination (J2000) 24- 25 I2 deg DEd Degree of Declination (J2000) 27- 28 I2 arcmin DEm Arcminute of Declination (J2000) 30- 31 I2 arcsec DEs Arcsecond of Declination (J2000) 33 I1 --- CCD ACIS CCD number (1) 35- 39 F5.2 [10-7W] LX Log of the 0.3-8 keV X-ray luminosity in units of erg/s (2) 41- 46 F6.1 ct ct(H) Net observed counts in the Hard band (3) 48- 51 F4.1 ct e_ct(H) ? Uncertainty in HR(H) 53- 58 F6.1 ct ct(M) Net observed counts in the Medium band (4) 60- 63 F4.1 ct e_ct(M) ? Uncertainty in HR(M) 65- 70 F6.1 ct ct(S) Net observed counts in the Soft band (5) 72- 75 F4.1 ct e_ct(S) ? Uncertainty in HR(S) 77- 81 F5.1 --- HR(HM) ? The (H-M)/(H+M) hardness ratio (6) 83- 86 F4.2 --- e_HR(HM) ? Uncertainty in HR(HM) 88- 92 F5.1 --- HR(MS) ? The (M-S)/(M+S) hardness ratio (6) 94- 97 F4.2 --- e_HR(MS) ? Uncertainty in HR(MS)
Note (1): CCDs 5 and 7 are back-illuminated, and the others are front-illuminated (see section 3.1). Note (2): Assuming galaxy distances listed in Table 2 and exposure times listed in Table 1. See section 3.1 for details about assumed spectrum. Note (3): Hard = 2.0-8.0keV. Note (4): Medium = 1.0-2.0keV. Note (5): Soft = 0.3-1.0keV. Note (6): Uncorrected (see section 3.1).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Apr-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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