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J/A+A/318/416  Radial velocities & photometry of classical Cepheids (Pont+ 1997)

Rotation of the outer disc from classical Cepheids. Pont F., Queloz D., Bratschi P., Mayor M. <Astron. Astrophys. 318, 416 (1997)> =1997A&A...318..416P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Radial velocities ; Photometry Keywords: stars: distance - kinematics - Cepheids - Galaxy: kinematics and dynamics Description: Radial velocities and distances have been measured for a sample of 48 remote classical Cepheids located in the outer disc of the Galaxy (118deg<l<274deg). The distances are determined from BVI photometry, with semi-empirical metallicity corrections calibrated on the Magellanic Clouds. Using these Cepheids as tracers, the rotation curve of the disc is determined between R0 and 2R0. The result is a flat rotation curve about 30km/s lower than theta0, Vrot=193±4km/s for R0≡8.5kpc and theta0=220kms/s assumed, or Vrot=167±4km/s for R0=8kpc and theta0=200km/s. The possible presence of non-axisymmetric components in the rotation of the outer disc is considered. We find a very small or vanishing value for any radial motion of the LSR or expansion/contraction motion. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file coravel 32 141 Coravel measurements elodie 35 163 Elodie measurements photom 49 224 Photometric measurements
Byte-by-byte Description of file: coravel
Bytes Format Units Label Explanations
1- 11 F11.3 d HJD Heliocentric Julian date 13- 18 F6.2 km/s RV Radial velocity 20- 23 F4.2 km/s e_RV ? rms uncertainty on RV 25- 30 A6 --- Name Object name 32 A1 --- Com Comment (1)
Note (1): a: uncertain cross-correlation function b: doubtful identification c: almost certainly mistaken identification
Byte-by-byte Description of file: elodie
Bytes Format Units Label Explanations
1- 11 F11.3 d HJD Heliocetric Julian date 13- 20 F8.3 km/s RV Radial velocity 22- 26 F5.3 km/s e_RV rms uncertainty in RV (photon noise only) 28- 35 A8 --- Name Object name
Byte-by-byte Description of file: photom
Bytes Format Units Label Explanations
1- 8 A8 --- Name Object name 10- 19 F10.2 d HJD Heliocentric Julian date 21- 26 F6.3 mag Vmag V (Geneva) filter 28- 33 F6.3 mag V-B V-B (Geneva) filter 35- 39 F5.3 mag V-R V-R (Gunn) filter 41- 45 F5.3 mag V-I V-I (Cousins) filer 48- 49 A2 --- Com Comment (1)
Note (1): a: low number of counts on B, uncertainty larger than 3% b: low number of counts on V c: observing run with too little standards observed, values with higher errors.

(End) Patricia Bauer [CDS] 28-Jun-1996
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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