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III/211 Keck/HIRES Sky Line Atlas (Osterbrock+ 1997)
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Night-sky high-resolution spectral atlas of OH and O2 emission lines for
echelle spectrograph wavelength calibration.
Osterbrock D.E., Fulbright J.P., Martel A.R., Keane M.J.,
Trager S.C., Basri G.
<Publ. Astron. Soc. Pacific 108, 277 (1996)>
=1996PASP..108..277O
Night-sky high-resolution spectral atlas of OH emission lines for
echelle spectrograph wavelength calibration. II.
Osterbrock D.E., Fulbright J.P., Bida T.A.
<Publ. Astron. Soc. Pacific 109, 614 (1997)>
=1997PASP..109..614O
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ADC_Keywords: Spectroscopy ; Atlases
Description:
This catalog provides a list of atmospheric OH and O2 lines that are
useful for wavelength calibration of high resolution spectra. Tables
of observed OH lines, and calculated wavelengths for molecular oxygen
(O2) are given; the journal of the observations is found in the
"Tables 1" section below, and spectra with identified lines are
provided as postscript figures, which are summarized in the "figs.dat"
file.
Introduction (from Paper 1):
The data are long exposure spectra taken with the Keck 10-meter
telescope high-resolution echelle spectrograph. The current CCD's are
not large enough to cover the whole spectrum in a single exposure but
by using two settings of the echelle, "left" (L) and "right" (R), it
is possible to do so, with an overlap in the middle. The night-sky
spectrum was subtracted from each exposure, and these pairs of
exposures were combined to get maximum spectral coverage. The
resulting night-sky spectrum extends from 385.6 nm (in order 92) to
1199 nm (in order 30). The resolution chosen was 0.02 nm at 700.0 nm
with a dispersion at the CCD of 0.005 nm/pixel. The wavelength was
calibrated on each exposure by the OH lines themselves. Note that on
orders 61 and 64 the atomic lines of O I 557.7 nm and Na I 589.0 nm
are so strong that the OH lines would not be visible with standard
scaling. Night-sky lines are visible in the spectra only longwards of
520.0 nm. No night-sky features were seen in order 62, 65, 66, and 67.
The wavelength from the laboratory measurements published by Abrams et
al (1994ApJS...93..351A) were used. Those are accurate to 10^-6^ nm
(1fm). The spectroscopic notation used is different from that found in
earlier astronomical literature. The notation follows the standard
spectroscopic notation described by Hertzberg (1950). The reader is
referred for details to the source reference.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
oh.dat 23 969 Observed OH lines (from papers 1 and 2)
o2.dat 15 45 Computed O2 lines (table 3 of Paper 1)
figs.dat 24 36 List of figures (spectra)
figs/* . 36 The 36 postscript figures (spectra)
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See also:
http://ucowww.ucsc.edu/~jfulb/OH.html : the original data distribution
Byte-by-byte Description of file: oh.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 0.1nm lambda Wavelength of observed OH line
11 I1 --- nu' Lower transition number
12 A1 --- --- [-]
13 I1 --- nu" Upper transition number
15- 23 A9 --- Trans OH line Transition
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Byte-by-byte Description of file: o2.dat
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Bytes Format Units Label Explanations
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1- 8 F8.2 0.1nm lambda ? Computed wavelength of O2 line
10- 15 A6 --- Trans O2 line Transition
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Byte-by-byte Description of file: figs.dat
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Bytes Format Units Label Explanations
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1-12 A12 --- PSfile Name of spectrum file in subdirectory figs
14-18 I5 0.1nm lambda1 Lower wavelength representation
20-24 I5 0.1nm lambda2 Upper wavelength representation
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Tables 1: Journal of the observations
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Date UT Orders lambda Exp RA (1950) DE z Az
0.1nm min deg
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Vogt/Keane (L) 1994-10-09 12:10 92-57 3865--6305 90 02:07 -00:19 26 184
(right) (R) 1994-10-09 14:28 92-57 3865--6305 90 02:07 -00:19 44 238
Vogt/Churchill 1995-01-24 14:51 82-53 4320--6760 30 12:13 -00:17 22 199
Basri Left (L) 1994-11-23 07:18 55-41 6388--8730 60 01:25 +27:50 80 32
Basri Right (R) 1995-03-12 06:23 55-41 6388--8730 60 03:45 +23:30 49 76
Sargent/Barlow (L) 1995-02-23 09:27 54-40 6510--8995 50 12:03 -07:26 50 120
(R) 1995-02-23 12:12 54-40 6510--8995 50 12:03 -07:26 28 178
Bida (L) 1996-01-11 05:52 36-47 7476-10035 25 00:25 +04:47 39 250
(R) 1995-09-10 10:18 36-47 7476-10035 20 00:52 +45:00 33 13
Bida (L) 1996-01-11 06:14 30-36 9760-11990 15 00:25 +04:47 44 255
(R) 1996-01-11 06:30 30-36 9760-11990 15 00:25 +04:47 48 257
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History:
15-Jul-1996: Part 1 (cat. J/PASP/108/277) prepared by Paul Kuin (NASA/ADC)
30-Jan-2000: (Francois Ochsenbein, CDS): Merge of the two papers, from the
files prepared by Paul Kuin (NASA/ADC) and the TableF.txt file prepared
by Jon Fulbright (jfulb@ucolick.org)
References:
Abrams, M.C., Davis, S.P., Rao, M.L.P., Engleman, Jr., R., and
Brault, J.W., 1994, ApJS, 93, 351 =1994ApJS...93..351A
Hertzberg, G. 1950, Molecular Spectra and Molecular Structure I.
Spectra of Diatomic Molecules (New York, Van Nostrand)
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(End) Francois Ochsenbein [CDS] 30-Jan-2000