J/PASP/110/779 Accurate Positions for MCG Galaxies (Corwin+ 1998)
Accurate Positions for MCG Galaxies
Corwin 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 1998PASP..110..779C
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
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ReadMe 80 . This file
position.dat 58 5120 Accurate positions
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See also:
VII/62 : MCG Vols 1-4 (Vorontsov-Velyaminov+, 1962-1974)
VII/100 : MCG Vol.5 (Vorontsov-Velyaminov+, 1974)
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.
Text describing position.dat:
Bytes 1-30 include one of the names for the galaxy included in NED.
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.
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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 1962MCG...C01....0V
=1964MCG...C02....0V 1964MCG...C02....0V
=1963MCG...C03....0V 1963MCG...C03....0V
=1968MCG...C04....0V 1968MCG...C04....0V
=1974MCG...C05....0V 1974MCG...C05....0V
(End) Harold G. Corwin, Jr. [NED/IPAC/Caltech] 09-Jul-1998