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111. CCD observations of Nereid
ID:
ivo://CDS.VizieR/J/A+AS/136/445
Title:
CCD observations of Nereid
Short Name:
J/A+AS/136/445
Date:
21 Oct 2021
Publisher:
CDS
Description:
229 CCD positions of Nereid taken between 1993 and 1998 are presented. Many of the observations were taken near the periapsis. Considering also the other published positions we have a good distribution of the observations on the eccentric orbit of the satellite. Using a numeric integration method we fitted all these observations in order to determine one state vector for the orbit. The observed minus calculated standard deviation for all observations is 0.23", and for our observations it is 0.16".
112. CCD observations of Phoebe in 1998-1999
ID:
ivo://CDS.VizieR/J/A+A/391/767
Title:
CCD observations of Phoebe in 1998-1999
Short Name:
J/A+A/391/767
Date:
21 Oct 2021
Publisher:
CDS
Description:
In 1998 and 1999, we started observations of the 9th satellite of Saturn. We made 163 observations using the 120cm-telescope of Observatoire de Haute-Provence, France. We used the USNO A2 catalogue (Cat. <I/252>) of stars for the astrometric reduction. With the help of observations of optical counterparts of ICRF sources, a zonal correction to the USNO A2.0 catalogue was computed and applied to the Phoebe positions. A comparison to the most recent theories was made.
113. CCD observations of saturnian satellites
ID:
ivo://CDS.VizieR/J/other/SoSyR/45.523
Title:
CCD observations of saturnian satellites
Short Name:
J/other/SoSyR/45
Date:
21 Oct 2021
Publisher:
CDS
Description:
The astrometric positions of seven saturnian satellites are presented. Positions were derived from more then 5000 CCD frames taken with 26-inch Zeiss refractor at Pulkovo from Jan 2008 to may 2009. Astrometric reduction algorithm is based on Turner's method with using UCAC2 catalog as reference one. Observed positions were compared with theoretical ones from TASS 1.7 (Viennel & Duriez, 1995A&A...297..588V). The accuracy is about 0.05 arcsec. Also positions of Saturn were obtained from observations of satellites 2-6.
114. CCD observations of visual double stars
ID:
ivo://CDS.VizieR/J/PAZh/36/365
Title:
CCD observations of visual double stars
Short Name:
J/PAZh/36/365
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of 3632 astrometric CCD-measurements of 314 visual double stars performed with the 26-inch refractor of the Pulkovo observatory in 2003-2007. Angular separations (rho) and position angles (theta) are provided. Mean values of standard errors are 0.009" in rho and 0.40(deg)/rho in theta, where rho is the separation in arcseconds.
115. CCD positions for eight Jovian irregular satellites
ID:
ivo://CDS.VizieR/J/A+A/453/349
Title:
CCD positions for eight Jovian irregular satellites
Short Name:
J/A+A/453/349
Date:
21 Oct 2021
Publisher:
CDS
Description:
The astrometric positions of eight irregular Jovian satellites are given for the oppositions of the planet from 1995 to 1999. These positions were measured on 204 CCD frames obtained at the Cassegrain focus of a 1.6m reflector. They are compared with the theoretically calculated positions from JPL Development Ephemeris. The observed minus-calculated standard deviation for all observations of the eight satellites are {sigma}_RA_=0.071" and {sigma}_DE_=0.052". The USNO-A2.0 (<I/252>) catalog was used for the astrometric calibration.
116. CCD survey of galaxies. III.
ID:
ivo://CDS.VizieR/J/A+AS/107/285
Title:
CCD survey of galaxies. III.
Short Name:
J/A+AS/107/285
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
117. CCD Survey of Galaxies IV
ID:
ivo://CDS.VizieR/J/A+AS/112/257
Title:
CCD Survey of Galaxies IV
Short Name:
J/A+AS/112/257
Date:
21 Oct 2021
Publisher:
CDS
Description:
Continuing a CCD survey of galaxies belonging or projected onto the Coma and Hercules Superclusters, to the A262 and Cancer clusters, we present isophote maps and photometric profiles in the Johnson system of 111 galaxies (67 in the V and B bands, 42 only in V, 2 only in B) obtained with the 2.1m telescope at San Pedro Martir (Baja California, Mexico).
118. CdC2000 Bordeaux Carte du Ciel catalogue
ID:
ivo://CDS.VizieR/I/303
Title:
CdC2000 Bordeaux Carte du Ciel catalogue
Short Name:
I/303
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the CdC2000 catalogue issued from the reduction of the complete Bordeaux Carte du Ciel zone observed at the beginning of last century with the Bordeaux astrograph. This catalogue is a positional catalogue of 344780 stars covering the declination zone +11{deg}<delta<+18{deg}. The average epoch of positions is 1914.7. The data are from the 512 Carte du Ciel plates archived at the Bordeaux Observatory and scanned with the APM Cambridge automatic measuring machine. Plates have been individually reduced using the TYCHO-2 Catalogue as astrometric reference. Astrometric standard errors are about 0.10" to 0.12" on positions and 0.6 magnitudes on photographic magnitudes. A detailed study of errors and a comparison of various reduction methods are presented in order to take into account the significant propagated errors from the reference catalogue. The CdC2000 provides positions at the epoch of the plates for 50 682 TYCHO-2 stars. The associated positions are proved to be 0.11" more precise than the positions given by the Tycho-2 catalogue at the epoch of the plates. This work is part of a program of proper motion measurements in the Bordeaux Carte du Ciel zone (PM2000, Cat. <I/300>).
119. Celestial Reference Frame at 24 and 43 GHz
ID:
ivo://CDS.VizieR/J/AJ/139/1695
Title:
Celestial Reference Frame at 24 and 43 GHz
Short Name:
J/AJ/139/1695
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present astrometric results for compact extragalactic objects observed with the Very Long Baseline Array at radio frequencies of 24 and 43GHz. Data were obtained from ten 24-hr observing sessions made over a five-year period. These observations were motivated by the need to extend the International Celestial Reference Frame (ICRF) to higher radio frequencies to enable improved deep space navigation after 2016 and to improve state-of-the-art astrometry. Source coordinates for 268 sources were estimated at 24GHz and for 131 sources at 43GHz.
120. Celestial Reference Frame at 24 and 43GHz. II
ID:
ivo://CDS.VizieR/J/AJ/139/1713
Title:
Celestial Reference Frame at 24 and 43GHz. II
Short Name:
J/AJ/139/1713
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have measured the submilliarcsecond structure of 274 extragalactic sources at 24 and 43 GHz in order to assess their astrometric suitability for use in a high-frequency celestial reference frame (CRF). Ten sessions of observations with the Very Long Baseline Array have been conducted over the course of ~5 years, with a total of 1339 images produced for the 274 sources. There are several quantities that can be used to characterize the impact of intrinsic source structure on astrometric observations including the source flux density, the flux density variability, the source structure index, the source compactness, and the compactness variability.

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