Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/413/1581    Candidate subdwarfs and white dwarfs     (Gontcharov+, 2011)

Candidate subdwarfs and white dwarfs from the 2MASS, Tycho-2, XPM and UCAC3 catalogues. Gontcharov G.A., Bajkova A.T., Fedorov P.N., Akhmetov V.S. <Mon. Not. R. Astron. Soc., 413, 1581-1599 (2011)> =2011MNRAS.413.1581G
ADC_Keywords: Surveys ; Stars, white dwarf ; Stars, subdwarf ; Proper motions ; Photometry ; Stars, distances Keywords: stars: Population II - subdwarfs - white dwarfs - Galaxy: stellar content Abstract: Photometry from the Two-Micron All-Sky Survey (2MASS), United States Naval Observatory CCD Astrograph Catalog (UCAC3) and SuperCosmos catalogues, together with proper motions from the Tycho-2, Kharkiv Proper Motions (XPM) and UCAC3 catalogues, is used to select all-sky samples of 28 candidate white dwarfs, 1826 evolved and 7641 unevolved subdwarfs for R from 9-17mag. The samples are separated from main-sequence stars with an admixture of less than 10 per cent, owing to an analysis of the distribution of the stars in colour index versus reduced proper-motion diagrams for various latitudes using related Monte Carlo simulations. It is shown that the XPM and UCAC3 catalogues have the same level of proper-motion accuracy. Most of the selected stars have at least six-band photometry. This allows us to eliminate some admixtures and reveal some binaries. Empirical calibrations of absolute magnitude versus colour index and reduced proper motion for Hipparcos stars give us distances and a three-dimensional (3D) distribution for all the selected stars. It is shown that the subdwarf samples are almost complete for the Tycho-2 stars, i.e. to 11mag or 150pc from the Sun. For fainter stars from the XPM and UCAC3 catalogues, the subdwarf samples are complete only to 20-60 per cent because of the selection method and incompleteness of the catalogues. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 161 9495 Catalogue of candidate subdwarfs and white dwarfs from 2MASS, Tycho-2, XPM and UCAC3
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/315 : UCAC3 Catalogue (Zacharias+ 2009) I/319 : XPM-1.0 Catalog of positions and proper motions (Fedorov+ 2010) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 16 A16 --- 2MASS 2MASS IAU2000 designation (HHMMSSss+DDMMSSs) 18- 27 A10 --- Tyc2 Tycho-2 designation (TYC1 TYC2) 29- 34 I6 --- HIP ? Hipparcos number 36 I1 --- Cl [1/3] Stellar class among WD, ESD, USD (1) 37- 41 F5.2 mag KsMAG Obtained absolute Ks magnitude 42- 48 F7.1 mas/yr pmGlon Proper motion along galactic longitude (includes the cos(b) factor) 49- 55 F7.1 mas/yr pmGlat Proper motion along galactic latitude 56- 61 F6.2 mas plx ? Hipparcos parallax 62- 65 F4.1 mas e_plx ? Parallax precision 66- 70 F5.2 mag BTmag ? HIP/BT magnitude from Tycho-2 71- 74 F4.2 mag e_BTmag ? rms uncertainty on BTmag 75- 79 F5.2 mag VTmag ? HIP/VT magnitude from Tycho-2 80- 83 F4.2 mag e_VTmag ? rms uncertainty on VTmag 85- 89 F5.2 mag Jmag 2MASS J magnitude 91- 95 F5.2
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service