J/A+A/503/651 Variable stars in a VLT/VIMOS field in Carina (Pietrukowicz+ 2009)
Deep census of variable stars in a VLT/VIMOS field in Carina.
Pietrukowicz P., Minniti D., Fernandez J.M., Pietrzynski G., Ruiz M.T.,
Gieren W., Diaz R.F., Zoccali M., Hempel M.
<Astron. Astrophys. 503, 651 (2009)>
=2009A&A...503..651P 2009A&A...503..651P
ADC_Keywords: Stars, variable ; Binaries, eclipsing ; Stars, flare ; Photometry
Keywords: stars: variables: general - variables: delta Sct -
binaries: eclipsing - stars: flare - planetary systems -
stars: statistics
Abstract:
We have searched for variable stars in deep V-band images of a field
towards the Galactic plane in Carina. The images were taken with VIMOS
instrument at ESO VLT during 4 contiguous nights in April 2005. We
detected 348 variables among 50897 stars in the magnitude range
between V=15.4 and V=24.5mag. Upon detection, we classified the
variables by direct eye inspection of their light curves. All variable
objects but 9 OGLE transits in the field are new discoveries. We
provide a complete catalog of all variables which includes
eclipsing/ellipsoidal binaries, miscellaneous pulsators (mostly delta
Scuti-type variables), stars with flares and other (irregular and
likely long-period) variables. Only two of the stars in our sample are
known to host planets. Our result give some implications for future
large variability surveys.
Description:
Data table with 348 variables detected in the field of Carina.
For each object it contain data on: equatorial coordinates, magnitudes
and possible periods.
Instrumentation: 8.2-m Unit Telescope 3 + VIMOS imager with a scale of
0.205 arcsec/pixel at ESO Very Large Telescope at Paranal Observatory.
Date of observations: Apr 9-12, 2005
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
vimosvar.dat 80 348 Data on detected variables
phot/* . 348 Individual time-series photometry
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Byte-by-byte Description of file: vimosvar.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Name Variable identification number, VNNN
7- 8 I2 h RAh Right ascension J2000 (hours)
10- 11 I2 min RAm Right ascension J2000 (minutes)
13- 17 F5.2 s RAs Right ascension J2000 (seconds)
19 A1 --- DE- Declination J2000 (sign)
20- 21 I2 deg DEd Declination J2000 (degrees)
23- 24 I2 arcmin DEm Declination J2000 (minutes)
26- 29 F4.1 arcsec DEs Declination J2000 (seconds)
32- 37 F6.4 d Per ?=0.0000 Period (1)
40- 44 F5.2 mag Vmax ?=00.00 V minimum magnitude (1)
46- 50 F5.2 mag Vmin ?=00.00 V maximum magnitude (1)
52- 56 F5.3 mag Vamp Amplitude in V band
58- 62 F5.2 mag Vmag V magnitude
65- 67 A3 --- Type Variable type (2)
70- 80 A11 --- OName other name, if exists
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Note (1): Magic numbers 0.0000 for Per or 00.00 for Vmax,min mean no estimation
Note (2): Abbreviations used for different types of variables as follows:
del = delta Scuti
ecl = eclipsing
flr = star with a flare
pul = other pulsating variable
plf = pulsating star with a flare
tra = planetary transiting star
var = a variable star
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Byte-by-byte Description of file: phot/*
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Bytes Format Units Label Explanations
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2- 13 F12.6 d MJD Modified Julian Date
16- 21 F6.3 mag Vmag V magnitude
24- 28 F5.3 mag e_Vmag V magnitude error
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Acknowledgements:
Pawel Pietrukowicz,
Pontificia Universidad Catolica de Chile, pietruk(at)astro.puc.cl
(End) Pawel Pietrukowicz, [PUC, Chile], Patricia Vannier [CDS] 05-Jun-2009