J/A+A/519/A12 1318 new variable stars in Galactic plane (Miller+, 2010)
1318 new variable stars in a 0.25 square degree region of the Galactic plane.
Miller V.R., Albrow M.D., Afonso C., Henning T.
<Astron. Astrophys. 519, A12 (2010)>
=2010A&A...519A..12M 2010A&A...519A..12M
ADC_Keywords: Galactic plane ; Stars, variable ; Binaries, eclipsing
Keywords: catalogs - binaries: eclipsing - stars: variables: general
Abstract:
We have conducted a deep photometric survey of a 0.5deg*0.5deg area of
the Galactic Plane using the WFI instrument on the 2.2-m ESO telescope
on La Silla, Chile. The dataset comprises a total of 267 R-band
images, 204 from a 16 day observation run in 2005, supplemented by 63
images from a six week period in 2002. Our reduction employed the new
numerical kernel difference image analysis method as implemented in
the pySIS3 code and resulted in more than 500000 lightcurves of stars
down to a magnitude limit of R∼24.5. A search for variable stars
resulted in the detection of 1318 variables of different types. 1011
of these are eclipsing or contact binary stars. A number of the
contact binaries have low mass-ratios and several of the detached
binaries appear to have low-mass components. Three candidate contact
binaries have periods at the known cut off including two with periods
lower than any previously published. Also identified are 3 possible
pre-main sequence detached eclipsing binaries.
Description:
We present here Table 2 from the paper, listing the variable stars
with their identifications and periods. We also present the
photometric lightcurves for the variable stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 79 1318 Catalogue of variable stars
phot/* . 1318 Individual R-band relative flux light curves
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [1/1475] Variable star number
6- 7 A2 --- chip CCD chip and subchip
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 33 F6.3 arcsec DEs Declination (J2000)
35- 39 F5.2 mag Rcmag WFI Cousins R magnitude
41- 44 F4.2 mag B-Rc WFI Johnson-Cousins B-R colour index
46- 50 F5.2 mag Rc-Ic WFI Cousins R-I colour index
52- 59 F8.5 d Per Period
61- 68 A8 --- Type Variable star type
70- 79 A10 --- FileName Name of the file containing the light curve
in subdirectory phot
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Byte-by-byte Description of file: phot/*
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date
15- 21 F7.4 --- df/f Relative flux variation in R-band
23- 28 F6.4 --- e_df/f ? Uncertainty in relative flux variation
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Acknowledgements:
Michael Albrow, Michael.Albrow(at)canterbury.ac.nz,
Department of Physics and Astronomy, University of Canterbury
(End) Michael Albrow [Univ. of Canterbury], Patricia Vannier [CDS] 24-Jun-2010