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J/A+A/377/925       Radial velocity curves of Vela X-1        (Barziv+, 2001)

The mass of the neutron star in Vela X-1. Barziv O., Kaper L., van Kerkwijk M.H., Telting J.H., van Paradijs J. <Astron. Astrophys. 377, 925 (2001)> =2001A&A...377..925B
ADC_Keywords: Radial velocities ; Stars, OB ; X-ray sources Keywords: equation of state - stars: binaries: eclipsing - stars: early-type - stars: fundamental parameters - stars: neutron - stars: pulsars: individual: Vela X-1 Description: In this paper the mass of the neutron star in Vela X-1 is determined, by measuring the radial velocity curve of its B supergiant companion. The tables (appendix of the paper), which list the log of observations, and the derived radial velocities, of the blue Coude Echelle Spectrograph (CES) spectra (Table A1), the red CES spectra (Table A2), and the IUE spectra (Table A3). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 09 02 06.8 -40 33 17 Vela X-1 = HD 77581 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 85 77 Observing log and radial velocities for the blue spectra (central wavelength 4102Å) tablea2.dat 86 104 Observing log and radial velocities for the red spectra (central wavelength 5965Å) tablea3.dat 37 43 IUE observations of HD 77581 tables.tex 106 353 LaTeX version of the tables
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Ident Instrument identification (1) 7- 18 F12.4 d BJD Barycentric-corrected Julian Date of observation 20- 25 F6.4 --- phi Orbital phase calculated using the ephemeris of Bildsten et al. (1997ApJS..113..367B) 27- 32 F6.2 km/s RV4089 Radial velocity of Si IV 4089AA spectral region (2) 34- 37 F4.2 km/s e_RV4089 rms uncertainty on RV4089 39- 44 F6.2 km/s RV4097 Radial velocity of N III 4097AA spectral region (2) 46- 49 F4.2 km/s e_RV4097 rms uncertainty on RV4097 51- 56 F6.2 km/s RV4102 ? Radial velocity of Hdelta 4102AA spectral region (2) 58- 61 F4.2 km/s e_RV4102 ? rms uncertainty on RV4102 63- 68 F6.2 km/s RV4116 Radial velocity of SI IV 4116AA spectral region (2) 70- 73 F4.2 km/s e_RV4116 rms uncertainty on RV4116 75- 80 F6.2 km/s RVTot Radial velocity of the ensemble of the two Si IV and the N III regions 82- 85 F4.2 km/s e_RVTot rms uncertainty on RVTot
Note (1): The second digit of the identification specifies the CCD used (b4 for CCD#34 and b8 for CCD#38). Note (2): Radial velocity and associated uncertainty for each spectral region separately, as derived by means of cross-correlation.
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Ident Instrument identification (1) 8- 19 F12.4 d BJD Barycentric-corrected Julian Date of observation 21- 26 F6.4 --- phi Orbital phase calculated using the ephemeris of Bildsten et al. (1997ApJS..113..367B) 28- 33 F6.2 km/s RV5676 Radial velocity of N II 5676/9AA spectral region (2) 35- 38 F4.2 km/s e_RV5676 rms uncertainty on RV5676 40- 45 F6.2 km/s RV5697 Radial velocity of N II 5697AA spectral region (2) 47- 50 F4.2 km/s e_RV5697 rms uncertainty on RV5697 52- 57 F6.2 km/s RV5686 Radial velocity of Al III 5686AA spectral region (2) 59- 62 F4.2 km/s e_RV5686 rms uncertainty on RV5686 64- 69 F6.2 km/s RV5705 ? Radial velocity of C III 5705AA spectral region (2) 71- 74 F4.2 km/s e_RV5705 ? rms uncertainty on RV5705 76- 81 F6.2 km/s RVTot Radial velocity of the ensemble of the two N II, the Al III and the C III regions 83- 86 F4.2 km/s e_RVTot rms uncertainty on RVTot
Note (1): The second digit of the identification specifies the CCD used (r4 for CCD#34 and r8 for CCD#38) Note (2): Radial velocity and associated uncertainty for each spectral region separately, as derived by means of cross-correlation.
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 5 I5 --- SWP SWP number of spectrum in IUE archive 7- 17 F11.3 d HJD Julian Date at mid-exposure 19- 21 I3 min ExpTime Exposition time 23- 27 F5.3 --- phi Orbital phase (1) 29- 33 F5.1 km/s Vel Velocity (2) 35- 37 F3.1 km/s e_Vel rms uncertainty on Vel (1σ error)
Note (1): Using the ephemeris of Bildsten et al., 1997ApJS..113..367B, i.e. Tπ/2 = 2448895.7186(12) JD (Time of mean longitude 90°) Note (2): Velocity relative to SWP1442; corrected for shift of interstellar lines.
Acknowledgements: Lex Kaper References: van Paradijs et al., Paper I 1977A&AS...30..195V an Kerkwijk et al., Paper II 1995A&A...303..483V
(End) Patricia Bauer [CDS] 19-Oct-2001
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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