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461. Pulkovo Photographic Vertical Circle (PVC96)
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.
462. Pulkovo SMP Photographic Catalogue
ID:
ivo://CDS.VizieR/I/321
Title:
Pulkovo SMP Photographic Catalogue
Short Name:
I/321
Date:
21 Oct 2021
Publisher:
CDS
Description:
The results of new reduction of 1545 photographic observations of 14 selected asteroids' obtained with Normal Astrograph of Pulkovo observatory from 1948 to 1990 years presented. Photographic plates, stored in observatory's archive, was digitized using consumer flatbed scanner with special designed technique. The accuracy of measured photoplates was performed. The UCAC3 was used as reference catalog. The analysis of instrumental systematic effects, revealing in common distortion and magnitude equation, was performed and taken into account. The equatorial coordinates of 1378 single observations of selected asteroids was obtained and was made their comparison with results of reduction of this material obtained earlier. 1475 positions of stars with large proper motions from LSPM catalog was measured among background objects.
463. 2007-2016 Pulkovo Uranian satellites obs.
ID:
ivo://CDS.VizieR/J/other/PSS/134.96
Title:
2007-2016 Pulkovo Uranian satellites obs.
Short Name:
J/other/PSS/134.
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of the observations of the Uranian satellites made with the 26-inch refractor at the Pulkovo Observatory in 2007-2016. During this time we got 17 normal positions of Ariel, 43 normal positions of Umbriel, 112 normal positions of Titania and 122 normal positions of Oberon. The observations were performed every year from the end of august to the beginning of January. Our results show a good quality of contemporary theories of Uranian satellites' and planets' motion. Published positions of the Uranian satellites can be useful for construction of future theories. Almost 7000 CCD frames were analyzed and reduced using the UCAC4 catalog. Observation processing and coordinate measurement were performed with the IZMCCD software package (izmccd.puldb.ru). Special approach was used to eliminate a scattered halo caused by the bright planet.
464. Pulkovo Visual Double Star Catalogue
ID:
ivo://CDS.VizieR/I/292
Title:
Pulkovo Visual Double Star Catalogue
Short Name:
I/292
Date:
21 Oct 2021
Publisher:
CDS
Description:
Into the present catalogue the seasonal mean relative positions (rho and theta 2000) are included for 234 visual double stars observed at Pulkovo with 26-inch refractor from 1960 through 2001. This catalogue is a successor of the catalogue dated 1986 [1]. Epoch of equinox is 2000.0. The main aim of these observations is to create the data base for the double star orbit and mass determinations [2]. The stars with the great orbital motion, having longer observation series, were measured in the first line. The photographic and CCD observations of visual double stars are being continued now. The results will be included into the future catalogue. Some stars are accompanied with notes. More full information about visual double stars investigations in the Pulkovo Observatory may be obtained from the articles, the list of references being enclosed.
465. Pulkovo visual double stars photographic obs.
ID:
ivo://CDS.VizieR/J/PAZh/42/46
Title:
Pulkovo visual double stars photographic obs.
Short Name:
J/PAZh/42/46
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of determining the relative positions of the 359 pairs of stars. More then six thousands of plates had been obtained in 1960-2007 years using the 26-inch Zeiss refractor(D=650mm, F=10413mm, scale is 19.80-arcsec/mm) at Pulkovo (code is 084). The plate digitization was carried out using a digital camera Canon EOS 5D Mark II and the lens 21M Jupiter, the scale was 21um/pixel. The measurements were calibrated using a template which was digitized by means of the Belgian high-precision scanner ROB Digitizer. Results were thoroughly examined for the systematic errors.
466. Pulsar timing at UAO
ID:
ivo://CDS.VizieR/J/MNRAS/328/855
Title:
Pulsar timing at UAO
Short Name:
J/MNRAS/328/855
Date:
21 Oct 2021
Publisher:
CDS
Description:
A pulsar timing system has been operating in the 18-cm band at the Urumqi Astronomical Observatory 25-m telescope since mid-1999. Frequency resolution allowing de-dispersion of the pulsar signals is provided by a 2x128x2.5MHz filterbank/digitizer system. Observations of 74 pulsars over more than 12 months have resulted in updated pulsar periods and period derivatives, as well as improved positions. Comparison with previous measurements showed that the changes in period and period derivative tend to have the same sign and to be correlated in amplitude. A model based on unseen glitches gives a good explanation of the observed changes, suggesting that long-term fluctuations in period and period derivatives are dominated by glitches. In 2000 July, we detected a glitch of relative amplitude {Delta}{nu}/{nu}~24x10^-9^in the Crab pulsar. The post-glitch decay appears similar to other large Crab glitches.
467. Quasars in ESO/SERC field 927
ID:
ivo://CDS.VizieR/J/MNRAS/266/317
Title:
Quasars in ESO/SERC field 927
Short Name:
J/MNRAS/266/317
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the spectroscopic observations of 56 quasars that were discovered by AQD (Automated Quasar Detection) in a field of ~25.3deg2, centred at (1950) RA l0h40m00s, Dec. 05deg00'00". These observations, with the CTIO 4-m telescope, led to the discovery by Clowes & Campusano of a large group of quasars with size ~100-200h^-1^Mpc at z~1.3. Quasars of particular interest are noted, including one that is a BAL quasar with z~1.78.
468. QUEST RR Lyrae survey. II. Halo overdensities
ID:
ivo://CDS.VizieR/J/AJ/132/714
Title:
QUEST RR Lyrae survey. II. Halo overdensities
Short Name:
J/AJ/132/714
Date:
21 Oct 2021
Publisher:
CDS
Description:
The first catalog of the RR Lyrae stars (RRLSs) in the Galactic halo by the Quasar Equatorial Survey Team (QUEST) has been searched for significant overdensities that may be debris from disrupted dwarf galaxies or globular clusters. These RRLSs are contained in a band 23 wide in declination that spans 165{deg} in right ascension and lie 4 to 60kpc from the Sun. Away from the major overdensities, the distribution of these stars is adequately fitted by a smooth halo model, in which the flattening of the halo decreases with increasing galactocentric distance (as reported by Preston et al., 1991ApJ...375..121P). This model was used to estimate the background of RRLSs on which the halo overdensities are overlaid. A procedure was developed for recognizing groups of stars that constitute significant overdensities with respect to this background. To test this procedure, a Monte Carlo routine was used to make artificial RRLS surveys that follow the smooth halo model but with Poissondistributed noise in the numbers of RRLSs and, within limits, random variations in the positions and magnitudes of the artificial stars. The 104 artificial surveys created by this routine were examined for significant groups in exactly the same way as the QUEST survey.
469. QUEST RR Lyrae Survey III. Low Galactic latitude
ID:
ivo://CDS.VizieR/J/MNRAS/427/3374
Title:
QUEST RR Lyrae Survey III. Low Galactic latitude
Short Name:
J/MNRAS/427/3374
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present results for the QUEST RR Lyrae Survey at low Galactic latitude, conducted entirely with observations obtained with the QUEST mosaic camera and the 1.0/1.5-m Jurgen Stock Schmidt telescope at the National Observatory of Venezuela. The survey spans an area of 476deg^2^ on the sky, with multi-epoch observations in the V, R and I photometric bands for 6.5x10^6^ stars in the Galactic latitude range -30{deg}<=b<=+25{deg}, in a direction close to the Galactic anticentre 190{deg}<=l<=230{deg}. The variability survey has a typical number of 30 observations per object in V and I and ~25 in R, with up to ~120-150 epochs in V and I and up to ~100 in R in the best sampled regions. The completeness magnitudes of the survey are V=R=18.5mag, and I=18.0mag. We identified 211 RR Lyrae stars, 160 bona fide stars of type ab and 51 candidates of type c, ours being the first deep RR Lyrae survey conducted at low Galactic latitude, in the Galactic disc. The completeness of the RR Lyrae survey was estimated in >~95 and ~85 per cent for RRab and RRc stars, respectively. Photometric metallicities were computed based on the light curves and individual extinctions calculated from minimum light colours for each RRab star. Distances were obtained with typical errors ~7 per cent. The RR Lyrae survey simultaneously spans a large range of heliocentric distances 0.5<=R_hel_(kpc)<=40 and heights above the plane -15<=z(kpc)<=+20, with well-known completeness across the survey area, making it an ideal set for studying the structure of the Galactic thick disc.
470. Radial velocities of 47 Oph
ID:
ivo://CDS.VizieR/J/AJ/149/110
Title:
Radial velocities of 47 Oph
Short Name:
J/AJ/149/110
Date:
21 Oct 2021
Publisher:
CDS
Description:
Although 47 Oph has been shown to be a binary with a period of ~27days using both spectroscopic and interferometric techniques, only a preliminary orbit has been obtained in the previous work due to the shortage of high precision measurements. Since 1997, new spectroscopic and interferometric measurements have been obtained with much higher precision by the spectrograph of the 2.16m telescope at Xinglong station and the Navy Precision Optical Interferometer, respectively. Combining all of the measurements, a three-dimensional orbit is obtained with high precision in this work. Thus, the component masses are calculated to be 1.50+/-0.06 and 1.34+/-0.06M_{sun}_, respectively. The orbital parallax is 32.6+/-0.6mas, which is consistent with the Hipparcos parallax. With the known apparent magnitudes and color indices of the components, the derived luminosities are 7.80+/-0.36 and 3.41+/-0.25L_{sun}_. The estimated radii of the components are 2.06+/-0.07 and 1.36+/-0.06R_{sun}_. Finally, the evolutionary status of the components are investigated with the help of a stellar evolution model.

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