- ID:
- ivo://CDS.VizieR/I/267
- Title:
- The APM-North Catalogue
- Short Name:
- I/267
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- ****************************************************************** This version is a preliminary adaptation of the APM, covering the Northern sky at high galactic latitudes only. ****************************************************************** The catalogue APMCAT-POSS1-1.0 is derived from the first epoch (1949-1958) Palomar Observatory-National Geographic Sky Survey (POSS). The catalog is based on digitised scans with the laser based Cambridge Automated Plate Measurement(APM) machine of both the blue O plates and red E plates. The plates are scanned with a pixel sampling 8microns which corresponds 0.49 arcsecs at the nominal plate scale of 61arcsec/mm (16.4 micron/arcsec). Further details about the survey material can be found in Minkowski and Abell 1963 and Lund and Dixon 1973.
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Search Results
- ID:
- ivo://CDS.VizieR/I/282
- Title:
- The CMT CCD Drift Scan Survey
- Short Name:
- I/282
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is CMC12 (Version 1.0), an astrometric and photometric catalogue of 6.3 million stars in the red magnitude range 9 to 17. The Carlsberg Meridian Telescope (CMT) underwent a major upgrade in March 1999. A 2k by 2k CCD camera was installed with a Sloan r' filter operating in a drift scan mode. With the new system, the magnitude limit is r'_CMT_=17 and the positional accuracy is about 0.035". The main task of the CMT is to map the sky in the declination range -3{deg} to +30{deg} with the aim of providing an astrometric, and photometric, catalogue that can accurately transfer the Hipparcos/Tycho reference frame to Schmidt plates. The current release (Version 1.0) comprises all the observations made between March 1999 and March 2002 with the new CCD in the declination band -3{deg} to +3{deg}. It is intended to release the rest of the catalogue later. A more complete description is available in the documentation at http://www.ast.cam.ac.uk/~dwe/SRF/cmc12/cmc12_documentation.ps or http://www.ast.cam.ac.uk/~dwe/SRF/cmc12/cmc12_documentation.pdf
553. The Core of NGC 6624
- ID:
- ivo://CDS.VizieR/J/AJ/109/639
- Title:
- The Core of NGC 6624
- Short Name:
- J/AJ/109/639
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have used the Faint Object Camera on the Hubble Space Telescope (HST) to observe three fields near the center of the post-collapse globular cluster NGC 6624 in B and V. We use individual stellar positions and a maximum-likelihood technique to measure a position for the cluster center. We then transfer this position and the position of the x-ray source 4U 1820-30 to right ascension and declination, and correct an error of 1.8" in an earlier paper. From star counts, we obtain a density profile, with a power-law cusp of slope -0.84 +/- 0.16. No flat core is evident. We construct color-magnitude diagrams down to the main-sequence turnoff near the cluster center, and more than three magnitudes below the turnoff in the outermost field at r=28". The former diagram reveals a central population of blue stragglers, which has not previously been observed in this cluster. These blue stragglers are quite similar in specific frequency to those recently observed by HST in the core of 47 Tuc, and their presence adds to the growing evidence of stellar interactions in dense globular-cluster cores.
554. The epoch ICRF
- ID:
- ivo://CDS.VizieR/J/MNRAS/430/2633
- Title:
- The epoch ICRF
- Short Name:
- J/MNRAS/430/2633
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The epoch International Celestial Reference Frame (epoch ICRF) is proposed as a new concept in order to consider the effect of apparent proper motion of the position of a radio source due to acceleration of the spatial origin of the ICRF, the centre of mass of the Solar system. This apparent proper motion has a magnitude of approximately 5.8-microarcsec ({mu}as) per year, and for the 30-year very long baseline interferometry (VLBI) observational history these position variations will exceed 100{mu}as. We show that the dipole structure of the apparent proper motions leads to global rotation in the ICRF2 and the main term, the shift of direction of the origin of right ascension, reaches 25{mu}as per century. The 'epoch ICRF' is constructed using epoch positions at J2000.0 and apparent proper motions of radio sources, which are reported here for 295 ICRF2-defining sources.
- ID:
- ivo://CDS.VizieR/I/351
- Title:
- The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog
- Short Name:
- I/351
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Gaia + PanSTARRS1 (PS1) + Sloan Digital Sky Survey (SDSS) + Two Micron All-Sky Survey (2MASS) (GPS1) catalog was released in 2017. It delivered precise proper motions for around 350 million sources down to a magnitude of r~20mag. In this study, we present GPS1+, the extension GPS1 catalog down to r~22.5mag, based on Gaia data release 2 (DR2), PS1, SDSS, and 2MASS astrometry. GPS1+ totally provides proper motions for ~400 million sources with a characteristic systematic error of less than 0.1mas/yr. This catalog is divided into two subsamples, i.e., the primary and secondary parts. The primary ~264 million sources have either or both Gaia and SDSS astrometry, with a typical precision of 2.0-5.0mas/yr. In this part, ~160 million sources have Gaia proper motions, and we provide another new proper motion for each of them by building a Bayesian model. Relative to Gaia's values, the precision is improved by ~0.1dex on average; ~50 million sources are the objects whose proper motions are missing in Gaia DR2, and we provide their proper motions with a precision of ~4.5mas/yr. The remaining ~54 million faint sources are beyond Gaia detecting capability, and we provide their proper motions for the first time with a precision of 7.0mas/yr. However, the secondary ~136 million sources only have PS1 astrometry, where the average precision is worse than 15.0mas/yr. The large uncertainty probably limits it to qualitative applications. All the proper motions have been validated using QSOs and the existing Gaia proper motions. The catalog will be available via the TAP Service in the German Astrophysical Virtual Observatory.
- ID:
- ivo://CDS.VizieR/I/202
- Title:
- The FK5 Extension of the FK4 System
- Short Name:
- I/202
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The FK5 catalog was expanded from 1535 stars to include an additional 3117 stars which comprise the 'extension' to the new 'Basic' FK5, the revision of the FK4. For the basic FK5 a method of converting from the FK5 system to the FK4 system is provided in the catalog while for the Extension no algorithm was supplied. This catalog consists of two files. One file is the FK5 Extension placed at B1950.0 on the FK4 system. The second file is the FK5 Extension placed at the mean Epoch of place on the FK4 system.
- ID:
- ivo://CDS.VizieR/I/261
- Title:
- The FON Astrographic Catalogue (FONAC)
- Short Name:
- I/261
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The FONAC is a catalogue of positions, proper motions and photometric data for 2,008,383 of Astrographic Catalogue (AC) stars covering the sky between declinations +90 and -2 degrees. The average epoch of positions is 1988.19. The catalogue is based on the measurements of more then 1700 plates which were taken with the wide-angle astrograph of the Main Astronomical Observatory (MAO) in Kiev within the FON (Photographic Survey of the Northern Sky) project. The AC data were used both as the input catalogue for measuring machine PARSEC (Programming Automatic Radial-Scanning Coordinatometer) and as the first epochs for determination of proper motions of stars. The ACT Reference Catalogue was applied for the reductions of positions and B magnitudes of stars, the GSC1.1 was used for determination of (B-V) values, and the USNO R-magnitudes were used for determination of (B-R) values. The estimated precision is 0.2 arcseconds for the positions, 3 mas/yr for the proper motions, and 0.18mag for the photometry.
- ID:
- ivo://CDS.VizieR/J/ApJS/236/37
- Title:
- The Gaia-WISE extragalactic astrometric catalog
- Short Name:
- J/ApJS/236/37
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Gaia mission has detected a large number of active galactic nuclei (AGNs) and galaxies, but these objects must be identified among the thousandfold more numerous stars. Extant astrometric AGN catalogs do not have the uniform sky coverage required to detect and characterize the all-sky, low-multipole proper motion signals produced by the barycenter motion, gravitational waves, and cosmological effects. To remedy this, we present an all-sky sample of 567,721 AGNs in Gaia Data Release 1, selected using WISE two-color criteria. The catalog has fairly uniform sky coverage beyond the Galactic plane, with a mean density of 12.8 AGNs per square degree. The objects have magnitudes ranging from G=8.8 down to Gaia's magnitude limit, G=20.7. The catalog is approximately 50% complete but suffers from low stellar contamination, roughly 0.2%. We predict that the end-of-mission Gaia proper motions for this catalog will enable detection of the secular aberration drift to high significance (23{sigma}) and will place an upper limit on the anisotropy of the Hubble expansion of about 2%.
559. The GPM catalog
- ID:
- ivo://CDS.VizieR/I/285
- Title:
- The GPM catalog
- Short Name:
- I/285
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- GPM is the newer version of the General Compiled Catalogue of Absolute Proper Motions, derived with respect to galaxies within the plan called Catalogue of Faint Stars (KSZ, Deutch, 1952, Trans. IAU, Vol. 8, 789). The programme was proposed for several observatories of the former Soviet Union, China, Rumania and Spain. There are some resulting individual catalogues of absolute proper motions of stars compiled at five observatories (Kiev, Pulkovo, Moscow, Tashkent and Shanghai). The GPM combines these catalogues and comprises absolute proper motions for 52805 stars from 8 to 15.5mag in 185 fields north of -25 degrees of declination. The size of each region is nearly 1.5 square degrees. The mean standard error of proper motion is 8 mas/yr on average. Detailed information on the construction methodology and input data can be found in (Rybka & Yatsenko, 1997KFNT...13e..70R). In addition to absolute proper motions the GPM contains accurate equatorial coordinates and three-colour B V R photometry for the vast majority of its stars (Rybka 2000KFNT...16e..60R). Additional information was selected from all available sources. Usage of the ACT catalog should provide improved positions (mostly in removing of systematic errors) and improved photometry (because the brightest stars in each GPM region had B and V magnitudes measured by the Tycho experiment on the Hipparcos satellite). The mean accuracies achived, as demonstrated by comparison with above catalogue, are 250 mas for the positions and 0.22mag for B magnitude and 0.26mag for B-V colour. The GPM gives right ascensions and declinations for equinox J2000.0 and epoch copied from available sources. They were only presented to identify the GPM stars with those from other catalogues. The compiled catalogue also presents B magnitudes and B-V colours. They were converted to be close to Johnson system. The Tycho stars were also identified in the GPM catalogue. A search area with a radius of 2 arcseconds was used to search for multiple entries of the same star, which may be appeared in the region overlap areas. The detected entries were then removed from the final catalogue. The procedure decreased the number of stars in the catalogue by about 0.4 %. The adopted catalogue organization includes data in 185 regions sorted according the KSZ region numbers. The data were then sorted nearly in right ascension order within each GPM region. All information needed to associate a point on the sky with region number and provide a more rapid access to that region are given in file region.dat.
- ID:
- ivo://CDS.VizieR/J/AN/338/61
- Title:
- The GSH Binary Survey
- Short Name:
- J/AN/338/61
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Since 2009 the Grossschwabhausen binary survey is carried out at the University Observatory Jena. This new imaging survey uses available time slots during photometric monitoring campaigns, caused by non-photometric weather conditions, which often exhibit a good atmospheric seeing. The goal of the project is to obtain current relative astrometric measurements of binary systems, that are listed in the Washington Visual Double Star Catalog. In this paper we characterize the target sample of the survey, describe the imaging observations, the astrometric measurements including the astrometric calibration, and present relative astrometric measures of all binaries, which could be obtained in the course of the survey, so far.
