J/A+A/503/1023 Variability Sample Catalogue from SOGS (Fresneau+, 2009)
Variability Sample Catalogue selected from Sydney Observatory Galactic Survey.
Fresneau A., Osborn W.H.
<Astron. Astrophys. 503, 1023 (2009)>
=2009A&A...503.1023F 2009A&A...503.1023F
ADC_Keywords: Photometry, photographic ; Stars, variable ; Proper motions
Keywords: surveys - stars: variables: general
Abstract:
A set of 55000 stars brighter than about B-magnitude 14 and having
at least three observations are identified in the Sydney Observatory
Galactic Survey, carried out over the years 1892-1932 along the
galactic equator section l∈[275deg,335deg] with galactic latitude
b∈[-7deg,7deg]. Short-term (30min) and long-term (decades)
magnitude variations in the data set are analyzed.
Description:
We use a reduced proper motion diagram to classify the stars in our
sample into probable dwarfs, giants and other types. The validity of
the kinematical classification is checked using objective-prism
spectroscopic classification for 10x103 early-type stars. A search
is made for statistical correlations between our variability
indicators and physical and kinematical stellar properties.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
vsc.dat 87 54929 Variability sample catalogue
equator.dat 77 236797 Objects detected along the galactic equator
meridian.dat 74 164691 Objects detected along meridian l=330°
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See also:
J/A+A/469/1221 : Sydney observatory Galactic survey (SOGS) (Fresneau+, 2007)
Byte-by-byte Description of file: vsc.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs [0/60] Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 23 F4.1 arcsec DEs [0/60] Declination (J2000)
25- 29 F5.2 mag Vmag V magnitude
31- 35 F5.2 mag Bmag B magnitude
37- 42 F6.3 mag (B-V)0 Dereddened colour index
44- 47 F4.2 mag s1 Short-term scatter σ1
49- 52 F4.2 mag s2 Long-term scatter σ2
54- 57 F4.2 mag s3 Error due to statistical parallax error
59- 64 F6.3 arcsec/yr pmGlon Proper motion components in galactic longitude
66- 71 F6.3 arcsec/yr pmGlat Proper motion components in galactic latitude
73- 77 F5.2 mas plx Statistical parallax
79- 82 F4.2 --- c Probability for scatter correlation (2)
84- 87 A4 --- Ridge Ridge-line on HR diagram (1)
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Note (1): The ridge lines are (see Fig.6):
MS I = Main sequence star for population I
RG I = Red Giant branch for population I
RGII = Red Giant branch for population II
HBII = blue Horizontal branch for population II
SDII = Subdwarf branch for population II
WD I = White Dwarf of population I
Note (2): This term represents the probability for non-independence of the
short-term and long-term variabilities, according to trends of Fig.16
and tabulated in Table 3.
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Byte-by-byte Description of file: equator.dat
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Bytes Format Units Label Explanations
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2- 6 F5.2 mag Vmag V magnitude
9- 10 I2 h RAh Right Ascension J2000 (hours)
12- 13 I2 min RAm Right Ascension J2000 (minutes)
15- 19 F5.2 s RAs [0/60] Right Ascension J2000 (seconds)
21 A1 --- DE- Declination J2000 (sign)
22- 23 I2 deg DEd Declination J2000 (degrees)
25- 26 I2 arcmin DEm Declination J2000 (minutes)
28- 31 F4.1 arcsec DEs [0/60] Declination J2000 (seconds)
33- 39 F7.4 arcsec/yr pmRA Component in RA of the proper motion
40- 46 F7.4 arcsec/yr pmDE Component in DE of the proper motion
48- 52 F5.2 mas plx Statistical parallax
53- 57 F5.2 mas e_plx Statistical parallax error
60- 64 F5.2 mag Bmag Mean value at mean Epoch
66- 69 F4.2 mag e_Bmag Scatter in B-magnitude
72- 77 F6.1 d Ep Mean epoch
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Byte-by-byte Description of file: meridian.dat
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Bytes Format Units Label Explanations
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3- 7 F5.2 mag Vmag V magnitude
9- 13 F5.2 mag Bmag Mean B magnitude at mean Epoch
15- 18 F4.2 mag e_Bmag Scatter in B-magnitude
22- 23 I2 h RAh Right Ascension J2000 (hours)
25- 26 I2 min RAm Right Ascension J2000 (minutes)
28- 32 F5.2 s RAs [0/60] Right Ascension J2000 (seconds)
35 A1 --- DE- Declination J2000 (sign)
36- 37 I2 deg DEd Declination J2000 (degrees)
39- 40 I2 arcmin DEm Declination J2000 (minutes)
42- 45 F4.1 arcsec DEs [0/60] Declination J2000 (seconds)
48- 53 F6.3 arcsec/yr pmRA Component in RA of the proper motion
54- 59 F6.3 arcsec/yr pmDE Component in DE of the proper motion
62- 67 F6.1 d Ep Mean epoch
70- 74 F5.2 mas plx Statistical parallax
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Acknowledgements:
Alain Fresneau, fresneau(at)astro.u-strasbg.fr
(End) Patricia Vannier [CDS] 07-Jul-2009