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/journal_tables/PASP/110/779/

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J/PASP/110/779       Accurate Positions for MCG Galaxies         (Corwin+ 1998)
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Accurate Positions for MCG Galaxies
   Corwin Jr. H.G., Pesenson I., Schmitz M., Kim D.-C., Bennett, J., 
   Madore B.F., Mazzarella J.M., Helou G.       
   <Publ. Astron. Soc. Pac. 110, 779 (1998)>
   =1998PASP..110..779C
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ADC_Keywords: Positional data; Galaxy catalogs

Description:
   We have measured accurate celestial coordinates for over 4000 extragalactic 
   objects primarily drawn from a list of MCG galaxies with no recently 
   published accurate positions.  We used IPAC's Skyview program to display 
   FITS images clipped from the Digitized Sky Survey, and to measure the 
   coordinates.  The standard deviations in the new positions depend slightly 
   on the measurement command used, but are on the order of 1.0 arcsec to 1.2 
   arcsec (internal errors).  The table of data includes all the duplicate 
   measurements we made, as well as corrections and additions made after the
   PASP paper was submitted, so has 5120 entries.

File Summary:
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  FileName    Lrecl    Records   Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
position.dat    58       5120   *Accurate positions
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Note on position.dat:
   Bytes 1-30 include one of the names for the galaxy included in NED.   

Nomenclature Notes:
   The names in bytes 1-30 are in NED format.  The suffix "NEDnn" (nn is a 
   two-digit number) added to a catalog name to create unique names in NED when
   the original catalogs do not include separate entries for double or multiple
   galaxies.  The suffix "NOTESnn" is added when the galaxy is included only in
   the Notes of the original catalogue.

See also:
    VII/62 : MCG Vols 1-4 (Vorontsov-Velyaminov+, 1962-1974)
   VII/100 : MCG Vol.5 (Vorontsov-Velyaminov+, 1974)

Byte-by-byte Description of file: position.dat
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  Bytes  Format   Units  Label    Explanations
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  1- 30  A30      ---    Name     NED name
 31- 32  I2       h      RAh      Right Ascension hours (J2000.0)
 34- 35  I2       min    RAm      Right Ascension minutes (J2000.0)
 37- 41  F5.2     s      RAs      Right Ascension seconds (J2000.0)
     44  A1       ---    DE-      Declination sign (J2000.0) 
 45- 46  I2       deg    DEd      Declination degrees (J2000.0)
 48- 49  I2       arcmin DEm      Declination minutes of arc (J2000.0)
 51- 54  F4.1     arcsec DEs      Declination seconds of arc (J2000.0)
     57  A1       ---    Method  *Method of measurement
     58  A1       ---    Survey  *Sky survey name       
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Note on Method:
   The method of measurement is "P" for measurements using Skyview's "pick"
   command, or "E" for measurements using the "examine" command.
Note on Survey:
   The digitized sky survey plate is "E" for the POSS1 103a-E red plates, and 
   "J" for the SERC IIIa-J blue-green plates.

Acknowledgments:
   Skyview was produced at IPAC under NASA contract NAS7-918.  The Digitized
   Sky Surveys were produced at the Space Telescope Science Institute under
   US Government grant NAG W-2166.  The images of these surveys are based on 
   photographic data obtained using the Oschin Schmidt Telescope on Palomar
   Mountain and the UK Schmidt Telescope at Siding Spring.  The NASA/IPAC
   Extragalactic Database (NED) is operated by the Jet Propulsion Laboratory,
   California Institute of Technology, under contract with the National
   Areonautics and Space Administration.

References:
   Vorontsov-Velyaminov B. A., Archipova V. P., and Krasnogorskaya A. A.
   1962, 1963, 1964, 1968, 1974, Morphological Catalogue of Galaxies, 
   Vols. 1-5 (Moscow: Moscow State Univ.) (MCG)
   =1962MCG...C01....0V
   =1964MCG...C02....0V
   =1963MCG...C03....0V
   =1968MCG...C04....0V
   =1974MCG...C05....0V

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(End)            Harold G. Corwin, Jr. [NED/IPAC/Caltech]            09-Jul-1998