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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 107 173 Parameters of variable stars in LRa02a field table5.dat 107 177 Parameters of variable stars in LRa02b field
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
Bytes Format Units Label Explanations
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
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.
Acknowledgements: We made use of USNO-A2.0, 2MASS (both via SIMBAD) and AAVSO (Cat. B/vsx, catalogues. Petr Kabath, Petr.Kabath(at)
(End) Petr Kabath [DLR, Germany], Patricia Vannier [CDS] 23-Jul-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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