J/A+A/554/A143 Hα spectra of MWC 342 spectra, 2004-2010 (Kucerova+, 2013)
Time-dependent spectral-feature variations of stars displaying the B[e]
phenomenon. II. MWC 342.
Kucerova B., Korcakova D., Polster J., Wolf M., Votruba V., Kubat J.,
Skoda P., Slechta M., Kricek M.
<Astron. Astrophys. 554, A143 (2013)>
=2013A&A...554A.143K 2013A&A...554A.143K
ADC_Keywords: Binaries, spectroscopic ; Spectroscopy ; Stars, Be
Keywords: stars: individual: MWC 342 - stars: emission line, Be -
stars: mass loss - binaries: spectroscopic - circumstellar matter
Description:
The catalogue presents spectra of MWC 342 (V1972 Cyg) obtained during
the period 2004 to 2010 with the Coude spectrograph at the 2m
telescope in Ondrejov observatory, Czech Republic, using the SITe CCD
(2030x800 pixels, 15um pixel size) in a camera with 700mm focus. The
spectral interval along the Hα line covers 6265 to 6765Å. The
resolving power is this range is R∼13000. The data reduction was
performed using IRAF. After the bias subtraction, flat-field and
overscan correction, the dcr program written by Pych
(2004PASP..116..148P 2004PASP..116..148P) was used for the cosmic ray removal. The spectra
subtraction was done by IRAF apall task without using the optimal
extraction . The background, together with the night sky lines, is
eliminated during spectra subtraction by individual pixel columns. The
remaining wavelength calibration, heliocentric correction, and the
continuum fitting are also performed using IRAF. The heliocentric
correction was applied on the data. Chebyshev polynomial of the third
order is used for the spectra normalisation to fit the intervals,
which apparently contain no spectral lines. Each continuum interval is
split into sub-intervals of five pixels, where the median value is
taken for the continuum evaluation. Possible remaining cosmic ray hits
thus do not affect continuum normalisation.
Objects:
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RA (2000) DE Designation(s)
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20 23 03.61 +39 29 50.1 MWC 342 = V* V1972 Cyg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 105 List of the spectra
sp/* . 105 Individual spectra
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See also:
J/A+AS/147/5 : AS 78 + MWC 657 spectroscopy (Miroshnichenko+, 2000)
J/A+A/542/A57 : Six year spectroscopy of V2028 Cyg (Polster+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- FileName Name of the spectrum file in subdirectory sp
17- 29 F13.5 d HJD Heliocentric Julian date of the spectrum
32- 38 F7.2 0.1nm lam.min Minimal wavelength in spectrum (Å)
40- 46 F7.2 0.1nm lam.max Maximal wavelength in spectrum (Å)
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.11 0.1nm lambda Wavelength λ (Å),
heliocentric correction applied
20- 29 F10.6 --- Flux Relative flux
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Acknowledgements:
Daniela Korcakova, kor(at)sirrah.troja.mff.cuni.cz
References:
Polster et al., Paper I (V2028 Cyg) 2012A&A...542A..57P 2012A&A...542A..57P, Cat. J/A+A/542/A57
(End) Patricia Vannier [CDS] 16-Apr-2013