J/PASP/122/524 Planetary nebulae in MACHO Galactic Bulge (Lutz+, 2010)
Planetary nebula central stars and symbiotic stars in the MACHO
Galactic Bulge database.
Lutz J., Fraser O., McKeever J., Tugaga D.
<Publ. Astron. Soc. Pac., 122, 524-535 (2010)>
=2010PASP..122..524L 2010PASP..122..524L
ADC_Keywords: Planetary nebulae ; Stars, distances ; Photometry, Cousins
Abstract:
We have examined central stars of planetary nebulae and symbiotic
stars found in the MACHO Galactic bulge database to look for
variability. We found four central stars of planetary nebulae and
eight symbiotic stars that show variability. We examine the
variability and the nature of these objects in detail, as well as
reporting on the objects that we did not find to be variable.
Description:
The MACHO project (Alcock et al., 1997ApJ...486..697A 1997ApJ...486..697A) comprises
observations taken over an 8-yr period of the Large and Small
Magellanic Clouds and the bulge of the Milky Way. Our sample of PNCS
is drawn from both the MACHO variable star catalogs (Alcock et al.,
2003, Cat. II/247) and the full database of detected sources. Sources
from the full MACHO database of millions of objects were selected for
the MGB Variable Star Catalog if the central 80% of points in the
object's light curve failed to fit a constant magnitude in a
chi-square test. This criterion resulted in 521007 candidate variables
in the Galactic bulge (http://wwwmacho.anu.edu.au/ )
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 101 102 Planetary nebula central stars and symbiotic stars
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See also:
II/247 : Variable Stars in the Large Magellanic Clouds (MACHO, 2001)
http://wwwmacho.anu.edu.au/ : MACHO Project Home Page
Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1 I1 --- Type [1/6] Source type code (as original table
number (1)
3- 16 A14 --- PNG/PK PNG or PK name
18- 27 A10 --- Name Other name
29- 42 A14 --- MACHO MACHO (Field.Tile.Seq) name
43- 48 F6.2 arcsec Dist Distance to nearest MACHO object
50 A1 --- n_Vmag [*] Note on Vmag (2)
51- 54 F4.1 mag Vmag ?=- Cousins V magnitude
56- 59 F4.1 mag Rmag ?=- Cousins R magnitude
61-101 A41 --- Notes Notes
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Note (1): Source types as follows:
1 = Variable planetary nebula central stars
2 = Planetary nebula central stars that did not show variability
3 = Planetary nebula central stars not found
4 = Variable symbiotic stars
5 = Other symbiotic stars found in database but not variable
6 = Symbiotic stars not found
Note (2): For PNG 000.9-04.8, in table2.dat, original value of Vmag=118.2
corrected into Vmag=18.2.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Jan-2011