Access to Astronomical Catalogues

J/A+A/530/A151      V light curve of WR 123                    (Chene+, 2011)
A 10-hour period revealed in optical spectra of the highly variable WN8
Wolf-Rayet star WR 123.
    Chene A.-N., Foellmi C., Marchenko S.V., Saint-Louis N., Moffat A.F.J.,
    Ballereau D., Chauville J., Zorec J., Poteet C.A.
   <Astron. Astrophys. 530, A151 (2011)>
   =2011A&A...530A.151C
ADC_Keywords: Stars, Wolf-Rayet ; Photometry, CCD

Keywords: stars: individual: HD 177230 (WR 123) - stars: Wolf-Rayet -
          stars: winds, outflows - stars: oscillations -
          stars: variables: general

Abstract:
    What is the origin of the large-amplitude variability in Wolf-Rayet
    WN8 stars in general and WR123 in particular? A dedicated
    spectroscopic campaign targets the ten-hour period previously found in
    the high-precision photometric data obtained by the MOST satellite.

    In June-August 2003 we obtained a series of high signal-to-noise,
    mid-resolution spectra from several sites in the
    λλ4000-6940Å domain. We also followed the star with
    occasional broadband (Johnson V) photometry. The acquired spectroscopy
    allowed a detailed study of spectral variability on timescales from ∼5
    minutes to months.

Description:
    File fig1.dat contains the HJD times, Delta-V, i.e. the difference
    between the instrumental magnitudes of WR 123 and the weighted average
    instrumental magnitude of the comparison stars, and the sigma of
    Delta-V. These data are plotted in Figure 1 of the paper.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    19 03 59.0   -04 19 02   WR 123 = V* V1402 Aql
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
fig1.dat          31      142   Light curve of WR 123 obtained at Bell
                             Observatory in 2003


Byte-by-byte Description of file: fig1.dat

   Bytes Format Units   Label     Explanations

   1- 13  F13.5 d       HJD       Heliocentric Julian date
  15- 25  F11.8 mag     DVmag     Delta-V (WR - weighted average magnitude of
                                   comparison star)
  27- 31  F5.3  mag     e_DVmag   1-σ error on DVmag


Acknowledgements:
    Andres Nicolas Chene, achene(at)astro-udec.cl
(End)                                        Patricia Vannier [CDS]  29-Apr-2011