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J/PASP/118/1656        Secondary velocity standards at NGP     (Stefanik+, 2006)

Constant-velocity stars at the North Galactic Pole suitable for use as secondary velocity standards. Stefanik R.P., Latham D.W., Davis R.J. <Publ. Astron. Soc. Pac., 118, 1656-1665 (2006)> =2006PASP..118.1656S
ADC_Keywords: Galactic pole, north ; Stars, standard ; Radial velocities Abstract: We present mean radial velocities for 143 stars in Selected Area 57 at the north Galactic pole that are suitable for use as secondary velocity standards. The stars were drawn from a magnitude-limited sample and are mostly fainter than 11th magnitude in V. They span a wide range of effective temperatures and surface gravities and thus provide a suitable source of targets for observed templates. The mean radial velocities are based on at least 10 observations spanning at least 8200 days, and are accurate typically to 0.2km/s, with no obvious signs of variable velocity or composite spectra. Description: The radial velocities for our sample have been obtained with the CfA digital speedometers. Three nearly identical spectrographs have been used on the MMT and the 1.5m Tillinghast reflector at the F.L. Whipple Observatory, Mount Hopkins, Arizona, and the 1.5m Wyeth reflector at the Oak Ridge Observatory, Harvard, Massachusetts. The echelle spectrographs, with photon-counting intensified Reticon detectors, record about 45Å of spectrum in a single order centered at 5187Å. The spectral resolution is about 8.5km/s, and the signal-to-noise ratios range from 7 to 50 per resolution element. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 92 143 Target list and adopted template parameters notes.dat 100 22 Notes table2.dat 55 2694 Heliocentric radial velocities table3.dat 75 143 Mean velocities and errors
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Weistrop star name (WNNNN, Weis NNNN in Simbad) 7 A1 --- n_Name [b-x] Note on Name, in notes.dat files 9- 10 I2 h RAh Right ascension (J2000) 12- 13 I2 min RAm Right ascension (J2000) 15- 20 F6.3 s RAs Right ascension (J2000) 22 A1 --- DE- Declination sign (J2000) 23- 24 I2 deg DEd Declination (J2000) 26- 27 I2 arcmin DEm Declination (J2000) 29- 33 F5.2 arcsec DEs Declination (J2000) 35- 40 F6.1 mas/yr pmRA Proper motion along RA 42- 47 F6.1 mas/yr pmDE Proper motion along DE 49- 53 F5.2 mag Vmag V magnitude 54 A1 --- n_Vmag [ac] Photoelectric (a) or Photographic (c) 56- 59 F4.2 mag B-V ? B-V colour index 61- 65 F5.2 mag Jmag J magnitude 67- 70 F4.2 mag J-K J-K colour index 72- 75 F4.2 mag V-K V-K colour index 77- 92 A16 --- Template Template name
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1 A1 --- Note Note code 3-100 A98 --- Text Text of the note
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Weistrop star name (WNNNN, Weis NNNN in Simbad) 8- 9 I2 h RAh Right ascension (J2000) 11- 12 I2 min RAm Right ascension (J2000) 14- 17 F4.1 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 27 I2 arcsec DEs Declination (J2000) 29- 41 F13.5 d HJD Heliocentric Julian date 43- 49 F7.3 km/s HRV Heliocentric radial velocity 51- 55 F5.3 km/s e_HRV rms uncertainty on HRV
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Weistrop star name (WNNNN, Weis NNNN in Simbad) 8- 10 I3 --- Nobs Number of observations 12- 15 I4 d Span Time span of the observation 17- 20 F4.1 km/s vsini Projected rotational velocity 22- 27 F6.2 km/s RV Mean radial velocity 29- 32 F4.2 km/s e_RV rms uncertainty on RV 34- 37 F4.2 km/s extErr External error on RV 39- 42 F4.2 km/s intErr Internal error on RV 44- 47 F4.2 --- Ext/Int Ratio of external-to-internal error on HRV 49- 54 F6.2 --- chi2 Chi2 value 56- 63 F8.6 --- P(chi2) Probability of Chi2 65- 69 F5.2 --- <R> Mean R value, a measure of the fit between the observed spectra and the adopted template 71- 75 F5.3 --- <Corr> Average peak value of the correlation coefficient
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Jan-2008
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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