J/ApJS/119/207 IUE echelle spectra of hot white dwarfs (Holberg+, 1998)
A high-dispersion spectroscopic survey of the hot white dwarfs:
the IUE NEWSIPS SWP echelle data set.
Holberg J.B., Barstow M.A., Sion E.M.
<Astrophys. J. Suppl. Ser., 119, 207-238 (1998)>
=1998ApJS..119..207H 1998ApJS..119..207H
ADC_Keywords: Atlases ; Spectra, ultraviolet ; Stars, white dwarf
Mission_Name: IUE
Keywords: surveys - ultraviolet: stars - white dwarfs
Abstract:
This paper summarizes the results obtained from a comprehensive
analysis of all of the SWP echelle spectra of the white dwarf stars
contained in the IUE Final Archive. A total of 209 NEWSIPS spectra of
55 degenerate stars of various types have been systematically reduced
and analyzed. These include, in addition to conventional white dwarfs,
several examples of the hot planetary nebula central stars such as
NGC 246, which represent the initial stages of He-rich degenerate
evolution. A representative summary of the stellar, circumstellar, and
interstellar features found to be present in these spectra is
presented. For 33 of the 55 stars, multiple spectra of sufficient
quality exist so that co-added spectra with improved signal-to-noise
ratio can be constructed. Much previously unrecognized detail and many
new features are evident in these data. In addition, it was found
necessary to apply several corrections to the NEWSIPS extracted
spectra. These corrections, involving the wavelength scale and flux
uncertainty vector, are described.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 55 White dwarf parameters
table2.dat 72 209 Log of IUE SWP echelle spectra
refs.dat 78 20 References
table4.dat 63 297 Photospheric lines
table4b.dat 26 24 Photospheric lines average velocities
table5.dat 63 62 Circumstellar lines
table5b.dat 26 11 Circumstellar lines average velocities
table6.dat 61 48 Interstellar parameters
table7.dat 63 356 Interstellar lines
table7b.dat 26 48 Interstellar lines average velocities
sp.dat 27 37 List of coadded spectra in "sp" subdirectory
sp/* . 37 Coadded FITS spectra
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See also:
J/ApJS/147/145 : IUE low-dispersion spectra of white dwarfs (Holberg+, 2003)
http://vega.lpl.arizona.edu/newsips :
Library of IUE NEWSIPS SWP Echelle Spectra for White Dwarfs
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- n_WD [H He] H or He-rich degenerate
4- 5 A2 --- --- [WD]
7- 14 A8 --- WD WD designation
16- 29 A14 --- Name Other Name
34- 43 A10 --- Type White dwarf type
47- 51 F5.2 mag Vmag V magnitude
53 A1 --- l_Teff Limit flag on Teff
54- 59 I6 K Teff Effective temperature
61- 64 F4.2 [cm/s2] logg ? Surface gravity
67- 68 I2 --- r_WD ? References
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 39 A16 --- Aut Author's name
43- 78 A36 --- Com Comments
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- n_WD [H He] H or He-rich degenerate
4- 5 A2 --- --- [WD]
7- 14 A8 --- WD WD designation
16- 20 I5 --- SWP SWP Number
22 A1 --- Aper [LS] Aperture (Large or Small)
24- 33 A10 "YYYY/MM/DD" Date Observation date
35- 39 I5 s Explength Exposure length
41- 43 I3 --- C Continuum data number level
44 A1 --- --- [/]
45- 47 I3 --- B Background data number level
49- 55 F7.2 0.1pm Shift ? Wavelength shift (1)
57- 69 A13 --- Obs Observer name
71- 72 A2 --- Status [BWZ NS] Status of the spectrum (2)
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Note (1): For stars with multiple observations, wavelength shift used
to co-add the spectra.
Note (2): Status as follows:
Z = fully processed NEWSIPS spectrum
NS = low, unusable signal level
B = gross problems with the extracted spectrum
W = only sky background owing to the star being partially or
completely out of the aperture
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Byte-by-byte Description of file: table4.dat table5.dat table7.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- n_WD [H He] H or He-rich degenerate
4- 5 A2 --- --- [WD]
7- 14 A8 --- WD WD Number
17- 22 A6 --- Ion Species
24- 32 F9.4 0.1nm LambdaLab Laboratory wavelength
34- 42 F9.4 0.1nm LambdaObs Observed wavelength
44- 49 F6.2 km/s Vel Doppler velocity
51- 55 F5.2 km/s e_Vel rms uncertainty on Vel
57- 59 I3 0.1nm EW Equivalent width
61- 63 I3 0.1nm e_EW rms uncertainty on EW
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Byte-by-byte Description of file: table?b.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- n_WD [H He] H or He-rich degenerate
4- 5 A2 --- --- [WD]
7- 14 A8 --- WD WD Number
16- 21 F6.2 km/s <Vel> Mean Doppler velocity
23- 26 F4.2 km/s e_<Vel> rms uncertainty on <Vel>
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- n_WD [H He] H or He-rich degenerate
4- 5 A2 --- --- [WD]
7- 14 A8 --- WD WD number
16- 21 F6.1 pc Dist Distance
24- 29 F6.2 deg GLON Galactic longitude
31- 36 F6.2 deg GLAT Galactic latitude
38- 43 F6.2 km/s Vel Velocity
44 A1 --- n_Vel [abc] Note on Vel (1)
46- 49 F4.2 km/s e_Vel rms uncertainty on Vel
51 A1 --- l_logNH Limit flag on logNH
52- 56 F5.2 [cm-2] logNH ? Hydrogen column density
58- 61 F4.2 [cm-2] e_logNH ? rms uncertainty on logNH
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Note (1): Individual notes:
a = A second set of higher velocity ISM lines present at -56km/s
b = Contains a distinct set of low ionization C I lines (Sion et al.,
1997AJ....113..364S 1997AJ....113..364S)
c = A second set of higher velocity ISM lines present at -48km/s
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Byte-by-byte Description of file: sp.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [WD]
3- 10 A8 --- WD WD number
12- 27 A16 --- FITSfile Coadded spectrum in "sp" subdirectory
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History:
* 21-Jun-2005: From electronic version of the journal
* 08-Aug-2005: WD names corrected:
table4: name WD 2214-495 corrected into WD 2211-495
table1, last row, name WD 2115+339 corrected into WD 2117+342
(and similar corrections in the other tables)
and added coadded spectra from http://vega.lpl.arizona.edu/newsips/
(End) Patricia Vannier, Francois Ochsenbein [CDS] 21-Jun-2005