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J/MNRAS/386/521     BV(RI)c light curves of BS Com           (Dekany+, 2008)
Pulsational and evolutionary analysis of the double-mode RR Lyrae star BS Com.
    Dekany I., Kovacs G., Jurcsik J., Szabo R., Varadi M., Sodor A.,
    Posztobanyi K., Hurta Zs., Vida K., Vityi N., Szing A.
   <Mon. Not. R. Astron. Soc. 386, 521 (2008)>
   =2008MNRAS.386..521D
ADC_Keywords: Stars, variable ; Photometry, CCD ; Photometry, UBVRI ;
              Photometry, Cousins
Keywords: stars: abundances - stars: evolution - stars: fundamental parameters -
          stars: individual: BS Com - stars: oscillations -
          stars: variables: other

Abstract:
    We derive the basic physical parameters of the field double-mode RR
    Lyrae star BS Com from its observed periods and the requirement of
    consistency between the pulsational and evolutionary constraints.
    We performed a standard frequency analysis on the V data by discrete
    Fourier transformation. We derived P0=0.48791d and P1=0.36307d for the
    periods of the fundamental and the first overtone modes, respectively.

Description:
    Extended BV(RI)c photometric data of the double-mode RR Lyrae star BS
    Comae are presented. The observations were obtained with the automated
    60 cm telescope of Konkoly Observatory, Svabhegy, Budapest, equipped
    with a Wright 750x1100 CCD, between 2005 March 1 and 2006 April 17. BS
    Com magnitudes are measured relative to BD+24 2598 by aperture
    photometry.
Objects:
    ----------------------------------------------------------
        RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
     13 34 39.2   +24 16 38   BS Com = GSC 01997-00754
     13 34 19.5   +24 12 18   BD+24 2598 = GSC 01997-00780
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tablea1.dat       23      568   BS Com B magnitudes relative to BD+24 2598
tablea2.dat       23      970   BS Com V magnitudes relative to BD+24 2598
tablea3.dat       23      924   BS Com Rc magnitudes relative to BD+24 2598
tablea4.dat       23      935   BS Com Ic magnitudes relative to BD+24 2598


Byte-by-byte Description of file: table*.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJD       Heliocentric Julian Date
      15  A1    ---     Band      [BVRI] Photometric Johnson/Cousins band
  18- 23  F6.4  mag     Dmag      Differential magnitude in "Band" band


Acknowledgements:
    Istvan Dekany, dekany(at)konkoly.hu
(End)   Istvan Dekany [Konkoly Observatory], Patricia Vannier [CDS]  09-Apr-2008