J/A+A/473/523 Spectroscopic monitoring of 3 neutron stars (Van der Meer+, 2007)
Determination of the mass of the neutron star in SMC X-1, LMC X-4 and Cen X-3
with VLT/UVES.
van der Meer A., Kaper L., van Kerkwijk M.H., Heemskerk M.H.M.,
van den Heuvel E.P.J.
<Astron. Astrophys. 473, 523 (2007)>
=2007A&A...473..523V 2007A&A...473..523V
ADC_Keywords: Binaries, eclipsing ; Pulsars ; Radial velocities
Keywords: stars: binaries: eclipsing - stars: neutron - stars: general -
equation of state - accretion, accretion disks
Abstract:
We present the results of a spectroscopic monitoring campaign of the
OB-star companions to the eclipsing X-ray pulsars SMC X-1, LMC X-4
and Cen X-3. High-resolution optical spectra obtained with UVES on
the ESO Very Large Telescope are used to determine the radial-velocity
orbit of the OB (super)giants with high precision. The excellent
quality of the spectra provides the opportunity to measure the
radial-velocity curve based on individual lines, and to study the
effect of possible distortions of the line profiles due to e.g. X-ray
heating on the derived radial-velocity amplitude.
Description:
Electronic tables belong to table 3 of the paper. As described in the
paper, all lines that have been fit to obtain the radial-velocity
curve of SMC X-1, LMC X-4 and Cen X-3, are published as online
material at CDS. Each table contains the orbital phase, the velocity,
error on the velocity, the full width at half maximum, error on the
full width at half maximum, the flux and error on the flux. Errors
indicate 1 sigma.
Objects:
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RA (2000) DE Designation(s) (Directory)
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01 17 05.1 -73 26 36 SMC X-1 = X SMC X-1 (smcx1)
05 32 49.9 -66 22 14 LMC X-4 = X LMC X-4 (lmcx4)
11 21 15.8 -60 37 23 Cen X-3 = V* V779 Cen (cenx3)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 33 90 List of radial-velocity curves
smcx1/* . 30 SMC X-1 radial-velocity curves
lmcx4/* . 30 LMC X-4 radial-velocity curves
cenx3/* . 30 Cen X-3 radial-velocity curves
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Name Object name
9- 15 F7.2 0.1nm Line Line wavelength
17- 33 A17 --- FileName Name of the file containing the
radial-velocity curve at that wavelength
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Byte-by-byte Description of file: smcx1/* lmcx4/* cenx3/*
--------------------------------------------------------------------------------
Column Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm Line Line wavelength
9- 13 F5.3 --- Phase Orbital phase
18- 24 F7.2 km/s RV ?=* Radial velocity
29- 33 F5.2 km/s e_RV ?=* Error on radial velocity
38- 43 F6.3 0.1nm FWHM ?=* Full width at half maximum
48- 53 F6.3 0.1nm e_FWHM ?=* Error on full width at half maximum
58- 63 F6.3 --- Flux ?=* Normalised flux
68- 73 F6.3 --- e_Flux ?=* Error on normalised flux
--------------------------------------------------------------------------------
Acknowledgements:
Arjen van der Meer, ameer(at)science.uva.nl
(End) A. van der Meer [University of Amsterdam] 19-Jul-2007