- ID:
- ivo://CDS.VizieR/I/290
- Title:
- Pulkovo catalogue of 58483 stars (Pul-3)
- Short Name:
- I/290
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A catalogue of positions and proper motions of 58483 stars (Pul-3) has been constructed at the Pulkovo observatory. The Pul-3 is based on the results of measurements of the photographic plates ((x,y)-data) with galaxies (Deutsch's plan). The observations were made with Pulkovo Normal Astrograph (F=3467mm, D=330mm) during the periods from 1935 till 1960 (the first epoch) and from 1969 till 1986 (the second epoch). The radius of working field was 50 arcmin for all plates. The exposure times were 1 hour. All plates were taken near the meridian. The measurements of the plates were made at the Pulkovo observatory in 1970-s and in 1980-s with ASCORECORD measuring machine. Photographic magnitudes of these stars have been determined at the Pulkovo observatory. The Pulkovo plates contain stars mainly 12-16.5 magnitudes in 146 field in declination zone from -5 to +85 degrees. The maximal density of stars in the Pulkovo plates is 500 stars per square degree. The Tycho-2 catalogue (Cat. <I/259>) has been used as a reference catalogue for astrometric reductions of the photographic plates. The great stars density of the Tycho-2 provides 40-65 reference stars in working field of the Pulkovo plates. Only approximate equatorial coordinates of the optical centers of all plates had been known in initial stage of construction of the Pul-3 catalogue and thus recalculation of ones has been done. A six-parameter plate model has been used for the astrometric reduction of the plates. The residuals of the tangential coordinates of reference stars have been analysed to investigate residual systematic errors. The coma parameters have been determined and coma-dependent systematic errors have been excluded. The magnitude-dependent systematic errors and color-dependent ones were investigated. The most significant corrections for magnitude equation have been obtained for stars brighter than 9 magnitude and fainter than 14 magnitude. The most significant color corrections have been obtained in equatorial zone for declinations of stars. The corrected coordinates of all stars have been determined. On the whole, recalculation of the plates optical centers and taking into account of all revealed systematic errors provide improvement of the accuracy of coordinates of stars on 64mas and 51mas for right ascension and declination correspondingly. The new proper motions have been determined for all stars. The mean position has been calculated at the mean epoch of observations of each star using it proper motion. The mean epoch of the Pul-3 is 1963.25. The internal positional accuracy of the Pul-3 catalogue at the mean epoch of observations is 80mas. The internal accuracy of the proper motions is 5mas/yr. Comparisons of the Pul-3 with Tycho-2 and ARIHIP have been done. The Pul-3 external positional accuracy relative to Tycho-2 is 150mas at the mean epoch of the Pulovo plates. The Pul-3 catalogue successfully represents the Tycho-2 system for more than 50000 stars which are fainter than 12 magnitude in 146 fields. The stars from the Pul-3 catalogue may be used as reference stars for reductions of the positional CCD-observations of the extragalactic radio sources and small bodies of the Solar system. The 40-years difference between Pul-3 observational epoch and modern epoch will allow to determine high precision proper motions of the faint stars of the Pul-3 catalogue (about 2mas/yr-3mas/yr). Proper motions of stars from Pul-3 catalogue may be used for stellar kinematics investigations. There are two data files for user's convenience: - the file pul3.dat represents the Pul-3 catalogue; - the file centers.dat contains the equatorial coordinates of centers of the Pulkovo fields (RA, DE).
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- 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/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.
- 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.
- 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.
- 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.
437. 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.
- 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.
- 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.
- 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.
