J/A+A/506/569 BEST-II periodic variables in CoRoT LRa02 field (Kabath+, 2009)
Periodic variable stars in CoRoT field LRa02 observed with BEST II.
Kabath P., Erikson A., Rauer H., Pasternacki T., Csizmadia Sz.,
Chini R., Lemke R., Murphy M., Fruth T., Titz R., Eigmueller P.
<Astron. Astrophys. 506, 569 (2009)>
=2009A&A...506..569K 2009A&A...506..569K
ADC_Keywords: Binaries, eclipsing ; Stars, variable ; Photometry, CCD
Keywords: methods: data analysis - binaries: eclipsing -
stars: variables: general
Abstract:
The Berlin Exoplanet Search Telescope II (BEST II) is a small wide
field-of-view photometric survey telescope system located at the
Observatorio Cerro Armazones, Chile. The high duty cycle combined with
excellent observing conditions and millimagnitude photometric
precision makes this instrument suitable for ground based support
observations for the CoRoT space mission. Photometric data of the
CoRoT LRa02 target field collected between November 2008 and March
2009 were analysed for stellar variability. The presented results will
help in the future analysis of the CoRoT data, particularly in
additional science programs related to variable stars. BEST II
observes selected CoRoT target fields ahead of the space mission. The
photometric data acquired are searched for stellar variability,
periodic variable stars are identified with time series analysis of
the obtained stellar light curves. We obtained the light curves of
104335 stars in the CoRoT LRa02 field over 41 nights. Variability was
detected in light curves of 3726 stars of which 350 showed a regular
period. These stars are, with the exception of 5 previously known
variable stars, new discoveries.
Description:
Photometric parameters for 350 periodic variable stars in the CoRoT
LRa02 field are presented. These stars are, with exception of 5
previously known variable stars, new discoveries. For each star
equatorial coordinates, 2MASS ID, magnitude with respect to USNO-A2.0
catalogue, amplitude of variation, period type and notes are given.
The data are obtained with help of differential photometry and the
magnitude scale is calibrated with respect to USNO-A2.0 catalogue.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 107 173 Parameters of variable stars in LRa02a field
table5.dat 95 177 Parameters of variable stars in LRa02b field
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See also:
B/corot : CoRoT observation log (CoRoT, 2009)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2009)
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2009)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)
J/AJ/134/766 : BEST variable stars in LRc1 field (Karoff+, 2007)
J/AJ/134/1560 : BEST periodic variable stars in IR01 field (Kabath+, 2007)
J/AJ/136/654 : BEST periodic variable stars in LRa1 field (Kabath+, 2008)
J/AJ/137/3911 : BEST periodic variable stars in LRc2 field (Kabath+, 2009)
Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name BEST ID (lra2a_NNNNN or lra2b_NNNNN)
12- 13 A2 --- n_Name [c* ] Note on star (1)
15- 30 A16 --- 2MASS 2MASS identification
32- 33 I2 h RAh Right Ascension J2000 (hours)
35- 36 I2 min RAm Right Ascension J2000 (minutes)
38- 41 F4.1 s RAs [0,60] Right Ascension J2000 (seconds)
43 A1 --- DE- Declination J2000 (sign)
44- 45 I2 deg DEd Declination J2000 (degrees)
47- 48 I2 arcmin DEm Declination J2000 (minutes)
50- 53 F4.1 arcsec DEs Declination J2000 (seconds)
55- 60 F6.3 mag mmag Mean magnitude (2)
62- 68 F7.4 d Per Period
70- 73 F4.2 mag Amp Amplitude (2)
75- 88 A14 --- Vtype Variability class (see B/gcvs)
90-107 A18 --- Onames Other names
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Note (1): Notes as follows:
* = stars located in the CoRoT's exoplanetary field-of-view.
c = Potential stellar crowding may affect the light curve
Note (2): the BEST-II observations use a CCD which has a light sensitivity
approximately equivalent to a broad R band.
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Acknowledgements:
We made use of USNO-A2.0, 2MASS (both via SIMBAD)
and AAVSO (Cat. B/vsx, http://www.aavso.org/vsx/index.php) catalogues.
Petr Kabath, Petr.Kabath(at)dlr.de
(End) Petr Kabath [DLR, Germany], Patricia Vannier [CDS] 23-Jul-2009