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J/AJ/129/348      Radio compact HII regions in the Milky Way     (Giveon+, 2005)
A new catalog of radio compact H II regions in the Milky Way.
    Giveon U., Becker R.H., Helfand D.J., White R.L.
   <Astron. J., 129, 348-354 (2005)>
   =2005AJ....129..348G
ADC_Keywords: H II regions

Keywords: catalogs - Galaxy: general - H II regions


Abstract:
    We use new VLA Galactic plane catalogs at 5 and 1.4 GHz covering the
    first Galactic quadrant (350°≤l≤42°, |b|≤0.4°) in
    conjunction with the MSX6C Galactic plane catalog (Cat. V/114) to
    construct a large sample of ultracompact H II regions. A radio catalog
    of this region was first published by Becker et al. (Cat.
    J/ApJS/91/347, but we have added new observations and rereduced the
    data with significantly improved calibration and mosaicking
    procedures, resulting in a tripling of the number of 5GHz sources
    detected. Comparison of the new 5GHz catalog and the MSX6C Galactic
    plane catalog resulted in a sample of 687 matches, out of which we
    estimate only 15 to be chance coincidences.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table4a.dat      108      687   List of 6cm sources with a high-reliability
                              (>90%) MSX match within 25"
table4b.dat      108      387   List of 6cm sources with a low-reliability
                              (50%<p<90%) MSX match within 25"


See also:
  J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)
  V/114         : MSX6C Infrared Point Source Catalog (Egan+ 2003)


Byte-by-byte Description of file: table4a.dat table4b.dat

   Bytes Format Units    Label     Explanations

   1- 17  A17   ---     [GBH2005]  Source name ([GBH2005] GLLL.lllll+L.lllll
                                    in Simbad)
  19- 24  F6.1  mJy      F5GHzp    Peak 5GHz flux density
  26- 32  F7.1  mJy      F5GHzi    Integrated 5GHz flux density
  34- 39  F6.2  arcsec   MajDiam   Deconvolved major axis
  41- 45  F5.2  arcsec   MinDiam   Deconvolved minor axis
  47- 50  F4.1  arcsec   Sep       Separation between the radio and IR sources
  52- 68  A17   ---      MSX6C     MSX6C source name (Cat. V/114)
      70  A1    ---      l_F8um    [<] Upper limit on F8um
  71- 76  F6.2  Jy       F8um      MSX6C 8 micron flux density (1)
      78  A1    ---      l_F12um   [<] Upper limit on F12um
  79- 85  F7.2  Jy       F12um     MSX6C 12 micron flux density (1)
      87  A1    ---      l_F14um   [<] Upper limit on F14um
  88- 94  F7.2  Jy       F14um     MSX6C 14 micron flux density (1)
      96  A1    ---      l_F21um   [<] Upper limit on F21um
  97-103  F7.2  Jy       F21um     MSX6C 21 micron flux density (1)
 105-108  F4.2  ---      Rel       The match reliability, between 0 (worst) and
                                    1 (best)

Note (1): Negative values correspond to upper limits.



History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    25-Jul-2005