Access to Astronomical Catalogues

J/other/JAD/18.2   CY Aqr multiband photometry: 2011 season  (Sterken+, 2012)
New times of maximum of CY Aquarii.
    Sterken C., Wiedemair C., Munaro T., Rigo  J., Durnwalder J., Kirchler A.,
    Damini Hofer J.,  Schraffl F.,  Olsen E. H.,  Tuvikene T.
   <J. Astron. Data, 18, 2 (2012)>
   =2012JAD....18....2S
ADC_Keywords: Stars, variable ; Photometry, uvby ; Photometry, CCD

Keywords: technique: photometric -- stars: individual: CY Aqr


Abstract:
    Based on more than a dozen partial nights of filterless CCD photometry
    combined with Stromgren uvby photomultiplier photometry, we derive 29
    new times of maximum light of the SX Phoenicis star CY Aquarii. These
    times support a linear ephemeris for 2003-2011. In addition, we
    present uvby light curves for this star. Our dataset displays the
    smallest residual spread compared to any other substantial dataset
    published during the last decade.

Description:
    The differential magnitudes of V* CY Aqr are presented in rgb2011.dat
    and sat.2011.dat. The times of maximum light of V* CY Aqr are given in
    tmax2011.dat.
Objects:
    ------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ------------------------------------------------
    22 37 47.9   +01 32 04   V* CY Aqr = HIP 111719
    ------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
rgb2011.dat       29     3467   RGB filterless photometry for V* CY Aqr
sat2011.dat       40      193   SAT uvby photometry for V* CY Aqr
tmax2011.dat      27       29   Times of maximum of V* CY Aqr (RGB + SAT)


Byte-by-byte Description of file: rgb2011.dat

   Bytes Format Units   Label   Explanations

   1- 13  F13.5 d       HJD     Heliocentric Julian Date
  15- 21  F7.4  mag     dmag    Differential magnitude, CY Aqr - C1
  23- 29  F7.4  mag     dmagc   Differential magnitude comparison stars, C1 - C2


Byte-by-byte Description of file: sat2011.dat

   Bytes Format Units   Label     Explanations

   1- 14  F14.6 d       HJD       Heliocentric Julian Date
  16- 21  F6.3  mag     dymag     Differential y magnitude, CY Aqr - C1
  23- 28  F6.3  mag     db-y      Differential b-y color index, CY Aqr - C1
  30- 34  F5.3  mag     dm1       Differential m1 color index, CY Aqr - C1
  36- 40  F5.3  mag     dc1       Differential c1 color index, CY Aqr - C1


Byte-by-byte Description of file: tmax2011.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJD       Heliocentric Julian Date
      14  I1    ---     W         [1,5]? Weight (1)
  16- 21  I6    ---     E         Cycle number
      23  A1    ---     Band      Passband (2)
  25- 27  A3    ---     Source    Source of the time of maximum (3)

Note (1): Weights as follows:
   -------------------------------------------------------------------
   Weight  Data density   Shape of maximum  Comment
   -------------------------------------------------------------------
      1  = very low       (ir)regular
      2  = medium       + irregular
      3  = high         + irregular         deviations from smoothness
      4  = medium       + regular
      5  = high         + regular           smooth light curve
   -------------------------------------------------------------------
Note (2): A blank value means filterless photometry.

Note (3): Time of maximum from:
    RGB = Section 2.1 (filterless CCD photometry),
    SAT = Section 2.2 (average of uvb and y band maxima).


Acknowledgements:
    Chris Sterken, csterken(at)vub.ac.be
(End)                               Patricia Vannier [CDS]           29-Feb-2012