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 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:
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RA (2000) DE Designation(s)
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19 03 59.0 -04 19 02 WR 123 = V* V1402 Aql
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 31 142 Light curve of WR 123 obtained at Bell
Observatory in 2003
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Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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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
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Acknowledgements:
Andres Nicolas Chene, achene(at)astro-udec.cl
(End) Patricia Vannier [CDS] 29-Apr-2011