- ID:
- ivo://CDS.VizieR/J/A+A/534/A91
- Title:
- Galactic Bulge Valinhos Observatory Catalog
- Short Name:
- J/A+A/534/A91
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The definition, construction and realization of a reference system is one of the oldest and most fundamental tasks of astronomy. Currently, the ICRS (International Celestial Reference System), realized by the ICRF (International Celestial Reference Frame) or ICRF2, is the reference system adopted by the IAU. It is based on the very precise VLBI positions of a few hundred compact extragalactic radio sources. Despite its excellent precision, the ICRF is far from providing a reference system that is available for the entire sky and accessible to all observers. The ICRF has to be densified and extended to other wavelengths, mainly to the optical domain where the astronomical activities are more intense. For this reason, the IAU has recommended and encouraged works in this direction over the years. Many of them were developed to give sometimes good positions and proper motions, but they are very limited in magnitude, while others are extremely dense and deep in magnitude but have low accuracy, mainly for the proper motions. Nevertheless, all these contributions are very important because they are complementary. We present a homogeneous and precise optical astrometric catalog that extends the ICRF in the direction of 12 low-extinction windows of the Galactic bulge and provides at the same time a useful database for kinematic studies.
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- ID:
- ivo://CDS.VizieR/I/272
- Title:
- M2000: Bordeaux Carte du Ciel zone +11<Dec<+18
- Short Name:
- I/272
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- During four years, systematic observations have been conducted in drift scan mode with the Bordeaux automated meridian circle in the declination band [+11 ; +18]. The resulting astrometric catalog includes about 2 300 000 stars down to the magnitude limit V_M_=16.3. Nearly all stars (96%) have been observed at least 6 times, the catalog being complete down to V_M_=15.4. The median internal standard error in position is about 35mas in the magnitude range 11<V_M_<15, which degrades to about 50mas when the faintest stars are considered. M2000 provides also one band photometry with a median internal standard error of 0.04mag. Comparisons with the Hipparcos and bright part of Tycho-2 catalogs have enabled to estimate external errors in position to be lower than 40mas. In this zone and at epoch 1998, the faint part of Tycho-2 is found to have an accuracy of 116mas in alpha instead of 82mas deduced from the model-based standard errors given in the catalog.
- ID:
- ivo://CDS.VizieR/J/A+AS/89/311
- Title:
- Optical positions of 221 radio stars
- Short Name:
- J/A+AS/89/311
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- 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.
- ID:
- ivo://CDS.VizieR/I/97
- Title:
- Perth 75 Catalogue
- Short Name:
- I/97
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The catalog contains results of approximately 60000 photoelectric meridian circle observations made at the Perth Observatory for 1156 FK4 and 1433 FK4 Supplement stars south of declination +38 degrees. The catalog reports proper motions and positions at epoch and equinox B1950.0. The data used to derive the epoch 1950 positions are included in the catalog so that originally observed positions may be recomputed and used for geodetic purposes until the FK5 becomes available. The mean error of an individual position in this catalog is 0.07" in right ascension and 0.13" in declination at a zenith distance of 45 degrees, while the mean error of the PERTH 75 system is 0.05" in right ascension and 0.10" in declination. The positions do not contain the large systematic errors of the FK4 (Fricke and Kopff 1963), which can be, for example 0.3" in right ascension for declination < -75 degrees. Data in the catalog included FK4 (FK4S) number, observed visual magnitude, spectral type used for computing refraction, right ascension and declination (equinox and epoch B1950.0), annual proper motion, observed residuals, numbers of accepted observations, and code to indicate if parallax and/or radial velocity has been used in computing apparent positions.
- ID:
- ivo://CDS.VizieR/I/42
- Title:
- Preliminary Cat. of Fund. Faint Stars
- Short Name:
- I/42
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The PFKSZ is based on 14 catalogues, observed at 10 observatories (Bucharest, Wroslaw, Kiev, Goloseevo-GAO, Kazan, GAISH, Odessa, Pulkovo, Tashkent, Kharkov). The catalogue PFKSZ contain 587 stars from 7.3 to 8.4 vis.mag. Most of the catalogues have been obtained from differential meridian observations in the FK3 system. The proper motions were found in the FK3 system mainly from GC, AGK2 (or AGK2A), Yale and PFKSZ catalogues. The precision of PFKSZ catalogue is Mean Error(in Alfa x cos Decl.) = +/- 0.0068 timesec Mean Error(in Decl.) = +/- 0.127 arcsec for the mean epoch 1949.0.
- ID:
- ivo://CDS.VizieR/I/266
- Title:
- Proper motions of fundamental stars (PMFS)
- Short Name:
- I/266
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalog contains the proper motions of 1535 Basic FK5 stars (Cat. <I/175>) derived from a direct combination of the Hipparcos catalog with 6 compiled and 57 observational ground-based astrometric catalogs. We used the positions and parallaxes from the HIP (Cat. <I/239>), radial velocities from the HIC (Cat. <I/196>) and positions from 57 observational ground-based catalogs with the mean epochs from 1939 to 1995. The differences of RA and DEC in the sense of `observational catalog minus HIP at the observational catalog epoch' were calculated and approximated by Legendre-Hermite-Fourier functions which then were eliminated. Thus formed the series of star positions referred to the ICRS for the various epochs were used to derive the new proper motions. The proper motions from the HIP and ground-based compilations GC, N30, FK5, N70E, CMC9 and KSV2 (Time Service Catalog 2) reduced to the Hipparcos system were used for the calculation of mean weighted proper motions as initial values for the first iteration of the main procedure. The resulting proper motions keep the proper motion system of Hipparcos (this is an advantage of the PMFS proper motions over ground-based ones such as from the FK5) but they are individually independent from any other proper motions, such as HIP, FK5, FK6, etc. The advantage of the PMFS proper motions over HIP ones is that they reflect the star motions over decades, not only in the course of the mission. Namely, the non-linear motions of 134 stars were directly separated into their proper motions of the barycentres and periodical motions of the photocentres around barycentres, and the proper motions of some other 200 stars were separated from their non-linear motions which were implicit in large differences between the PMFS and HIP proper motions of the stars. The stars were classified into 760 single ones, 187 astrometrically wide pairs, 35 astrometrically close pairs for which the results are doubtful and 551 stellar systems with 553 brighter components in the Basic FK5 for which the astrometrically observed photocentre moves, or can move, non-linearly with an amplitude >1 mas (including almost all known visual, photocentric and spectroscopic orbital pairs). Thus, the PMFS proper motions are the ones of the barycentres of these stars and stellar systems. The median precision of the proper motion components is 0.5 mas/year for proper motion on RA and 0.7 mas/year on DEC. Details are can be found at http://www.geocities.com/georgegontcharov/
- ID:
- ivo://CDS.VizieR/I/242
- Title:
- Pulkovo Photographic Vertical Circle (PVC96)
- Short Name:
- I/242
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The catalogue PVC96 is published. This is the first version of catalogue of declinations of FK5 (<I/149>) fundamental stars derived from the observations made with the Zverev photographic vertical circle (PVC) of the Pulkovo observatory in 1987-1994. The given comparison of the PVC96 with the HIP (<I/196>) catalogue obtained by the Hipparcos space project demonstrates that mean error of declination in the PVC96 is 0.1arcsec which corresponds to estimation made a priori.
- ID:
- ivo://CDS.VizieR/J/A+AS/95/355
- Title:
- Santiago catalogue of 1105 FK5 stars
- Short Name:
- J/A+AS/95/355
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The positions in right ascension and declination of 1105 FK5 stars, observed with a Meridian Circle during the period 1979 to 1991, are given. The average mean square error of a position, for the whole catalog, is +/-0.009s in right ascension and +/-0.10arcsec in declination. The mean epoch of the catalog is 1983.148.
- ID:
- ivo://CDS.VizieR/I/44
- Title:
- Second Cat of Fundamental Stars (SPF2)
- Short Name:
- I/44
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Catalogue SPF2 was obtained from observations of the fundamental FK4 stars as a reference stars for SRS, BS and DS star. Observations were made by Pulkovo observers in the declination zone -42 to -90 and +16 to -16 degrees using Repsold Meridian Circle of the Cerro Calan Observatory (Santiago, Chile) from 1963 to 1968.
20. SPF1 Catalogue
- ID:
- ivo://CDS.VizieR/I/82
- Title:
- SPF1 Catalogue
- Short Name:
- I/82
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- (no description available)
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