J/A+AS/89/311 Optical positions of 221 radio stars (Requieme+, 1991)
Optical positions of 221 radio stars obtained with the Bordeaux automatic
meridian circle.
Requieme Y., Mazurier J.M.
<Astron. Astrophys. Suppl. Ser. 89, 311 (1991)>
=1991A&AS...89..311R 1991A&AS...89..311R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, radio ; Meridian observations
Keywords: meridian astrometry - radio stars
Description:
This catalog contains optical positions of 221 radio stars observed
with the Bordeaux automatic meridian circle. The observations were
strictly differential, a convenient number of FK5 stars being used
each night to calculate the instrumental parameters. The mean
positions were corrected for chromatic refraction and also for
photocenter effect in the case of duplicity. The asymptotic accuracy
is expected to be about 0.05" for the Northern stars with a number of
observations greater than 25. Some positions have been published
previously, and the improved positions given here supersede earlier
published data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rad_strs.dat 100 221 Optical Positions of 221 Radio Stars
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See also:
J/A+A/312/1031 : Positions + proper motions of radio stars ; (Argyle+, 1996)
J/A+AS/105/429 : Optical position of radio stars (Carrasco+ 1994)
Byte-by-byte Description of file: rad_strs.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- DM ? DM or FK5 number of the source (1)
13- 22 A10 --- Oname ? Other identifier (1)
23- 24 A2 --- m_Oname Component, if duplicity (2)
26- 29 F4.1 --- Vmag Observed mean visual magnitude (3)
30 A1 --- f_Vmag [ v] Flagged if the star is variable (3)
34- 38 F5.2 s/ha pmRA Centennial proper motion in RA (4)
39 A1 --- f_pmRA [ *] Flagged if proper motion is from
Carlsberg catalog (4)
41- 42 I2 h RAh Right Ascension (B1950) (hour)
43- 44 I2 min RAm Right Ascension (B1950) (min)
45- 50 F6.3 s RAs Right Ascension (B1950) (sec)
51 A1 --- f_RAs [# ] Flagged if correction of photocenter was
applied
53- 54 I2 --- o_RAs Number of observations in RA (5)
56- 62 F7.2 yr EpRAs Mean epoch of observations in RA (6)
64- 68 F5.1 arcsec/ha pmDE Centennial proper motion in declination (4)
69 A1 --- f_pmDE Flagged if proper motion is from Carlsberg
catalog (4)
71 A1 --- DE- Declination sign (B1950)
72- 73 I2 deg DEd Declination (B1950) (deg)
74- 75 I2 arcmin DEm Declination (B1950) (arcmin)
76- 80 F5.2 arcsec DEs Declination (B1950) (arcsec)
81 A1 --- f_DEs [# ] Flagged if correction of photocenter
was applied
83- 84 I2 --- o_DEs Number of observations in Dec (5)
86- 92 F7.2 yr EpDEs Mean epoch of observations in Dec (6)
94- 96 F3.2 arcsec e_RAs Standard error in RA (7)
98-100 F3.2 arcsec e_DEs Standard error in Dec (7)
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Note (1): These columns give the DM or FK5 number of the source (if any)
and an alternative name.
Note (2): This column is flagged with a letter identifying the component
(if there is more than one) of the star whose position is given.
Note (3): The Vmag column gives the observed mean visual magnitude of the
radio star. The f_Vmag column is flagged with a 'v' if the star is
variable. For variable stars, the given magnitude corresponds to the
maximum of light during the period of observation.
Note (4): The pmRA and pmDE columns give the centennial proper motions in
sec/century and arcsec/century respectively. Proper motions are taken
from different astrometric catalogs. For a FK5 star, the given value
originates in the FK5 catalog (Fricke et al. 1988, Cat.I/149). An
asterisk in the f_pmRA or the f_pmDEC column indicates that the proper
motion is taken from the Carlsberg meridian catalog Number 4 (1989,
Cat.I/147). The values in pmRA and pmDEC are listed as zero if the
proper motions are not known.
Note (5): These columns give the number of observations in right ascension
and declination, respectively.
Note (6): These columns give the mean epoch of observations in right
ascension and declination, respectively. Epochs are given as decimal
years (- 1900), such as 87.93.
Note (7): These columns give the positional errors in arcsec for right
ascension and declination, respectively. Errors on the southern stars
are somewhat larger, particularly the declination error.
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History:
"The catalogue was originally archived as A040 by H. Andernach
() and the ADS documentation prepared in
collaboration with Carolyn Stern Grant ()."
References:
Carlsberg Meridian Catalogue La Palma Number 4 1989, "Observations of
positions of stars and planets: May 1984 to February 1988", Copenhagen
University Observatory, Royal Greenwich Observatory, Real Instituto y
Observatorio de La Armada en San Fernando. (Cat.I/147)
Fricke, W., Schwan, H., Lederle, T. et al. 1988, Fifth Fundamental
Catalogue (FK5), Part 1, Veroffentl. Aston. Rechen-Inst. Heidelberg,
Number 32. (Cat.I/149A)
(End) Patricio Ortiz [CDS] 30-Mar-1999