Access to Astronomical Catalogues

J/A+AS/136/261     Reference stars for 12 low-extinction fields (Dominici+ 1999)
Extension of Tycho catalog for low-extinction windows in the galactic bulge
       Dominici T.P., Teixeira R., Horvath J.E., Medina Tanco G.A.,
       Benevides-Soares P.
      <Astron. Astrophys. Suppl. Ser. 136, 261 (1999)>
      =1999A&AS..136..261D
ADC_Keywords: Extinction ; Stars, fundamental

Keywords: catalogues - astrometry - Galaxy: center


Description:
    Table B contains the recommended reference stars for the 12
    low-extinction fields towards the galactic bulge, that are the results
    of a extension of Tycho catalog (Cat. I/239, ESA, 1997) for these
    regions. The first column of the catalog indicates the star label,
    formed by a number that designates the window (see Table 1) and a
    sequential counter. The following columns contain the mean right
    ascension, the corresponding standard deviation (in seconds); the mean
    declination, its standard deviation (in arcseconds) (J2000); the
    weighted average magnitude, its standard deviation and weighted error.
    Stars belonging to the Tycho Catalogue are indicated with a "T" in the
    second column. We stress that, being a natural extension of the Tycho
    Catalogue, the Valinhos Reference Catalogue is not complete up to the
    given magnitude in that regions, but instead constitute a reference
    set which may prove useful for dedicated studies of low-extinction
    fields (Dominici, 1998, MSc. Thesis IAG/USP).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tableb.dat        74      506   Catalog of references (Tables B1 to B12)


See also:
   I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)


Byte-by-byte Description of file: tableb.dat

   Bytes Format Units    Label     Explanations

   1-  2  A2    ---      Window    Window name (4)
   4-  9  A6    ---      Name      Designation for the star (1)
      11  A1    ---      Tyc       [T] T if the star is catalogued in Tycho
  13- 14  I2    h        RAh       Right ascension (J2000)
  16- 17  I2    min      RAm       Right ascension (J2000)
  19- 25  F7.4  s        RAs       Right ascension (J2000)
  27- 32  F6.4  s        e_RAs     Standard deviation of the right ascension
      34  A1    ---      DE-       Declination sign
  35- 36  I2    deg      DEd       Declination (J2000)
  38- 39  I2    arcmin   DEm       Declination (J2000)
  41- 46  F6.3  arcsec   DEs       Declination (J2000)
  48- 52  F5.3  arcsec   e_DEs     Standard deviation of the declination
  54- 59  F6.3  mag      mag       Magnitude (2)
  61- 65  F5.3  mag      e_mag     Standard deviation of the magnitude
  67- 72  F6.4  mag      e_magw    Weighted error of the magnitude (3)

Note (1): The designation of stars is composed by a number (1- 31) that
     represent the low extinction window (see table 1) and a sequential
     counter.
Note (2): The magnitudes was measured in Valinhos filter, that is broader
     than the Jonhson V filter and extends from 5200 to 6800 Angstrons.
Note (3): The mean magnitude was weighted with the night errors, this is
     the weighted errors of the mean magnitude.
Note (4): (Table 1) Coordinates of the 12 low-extinction windows
     for which secondary catalogs based on Tycho data are presented
     (coordinates are from Blanco & Terndrup, 1989AJ.....98..843B
     and Blanco, 1988AJ.....95.1400B).
    ---------------------------------------------------
     Window  No      RA (J2000)  DE       GLON     GLAT
    ----------------------------------------------------
      BE      5    18 10 17  -31 45 49   -6.02     0.20
      BG      7    18 18 06  -32 51 24   -7.99     0.00
      BJ     10    l8 40 49  -34 49 48  -13.10     0.27
      LA     11    16 56 57  -52 44 53   -6.02   -24.77
      LB     12    17 18 27  -48 05 40   -6.01   -18.96
      LC     13    17 29 22  -45 20 05   -6.03   -15.61
      LD     14    17 44 59  -40 41 37   -5.99   -10.14
      LI     19    18 04 48  -33 47 46   -5.96    -2.11
      LR     27    18 23 32  -26 10 16   -5.98    +6.54
      LT     29    18 34 09  -21 23 35   -6.04    +9.87
      LU     30    18 51 26  -13 18 41   -6.03   +21.04
      LV     31    18 57 37  -10 23 35   -6.08   +24.35
    ----------------------------------------------------


Acknowledgements: Tania Pereira Dominici 

(End)                                         Patricia Bauer [CDS]   19-Nov-1998