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J/ApJ/662/750    ν9 fundamental band of ethane            (Vander+, 2007)

Toward an accurate database for the 12 µm region of the ethane spectrum. Vander Auwera J., Moazzen-ahmadi N., Flaud J.-M. <Astrophys. J., 662, 750-757 (2007)> =2007ApJ...662..750V
ADC_Keywords: Atomic physics Keywords: astronomical data bases: miscellaneous - infrared: general - line: formation - molecular data - techniques: spectroscopic Abstract: The ν9 fundamental band of ethane occurs in the 12um region. It is the strongest band of ethane in a terrestrial window in the thermal infrared and is commonly used to determine ethane's abundance in the atmospheres of the Jovian planets and comets and to determine their temperature. Precise and accurate absolute intensities of this band are crucial for correct interpretation of recent Cassini observations of ethane spectra in the atmospheres of Saturn and Titan, as well as of Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) observations in the terrestrial atmosphere. Using a spectrum of the ν9 band of ethane recorded at 278K at the Pacific Northwest National Laboratory, we show that the line parameters available in the HITRAN and GEISA databases do not allow reproduction of the experimental data to within their accuracy. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 100 21607 *Content of linelist "LIST 3"
Note on table4.dat: formatted according to the 100-character records of the 1986 through 2001 editions of the HITRAN database (See details in Rothman, et al. 2005, J. Quant. Spectrosc. Radiat. Transfer, 96, 139)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID [271] HITRAN isotopologue number of 12C2H6 4- 15 F12.6 cm-1 nu [706.6,961.2] Line frequency (vacuum wavenumber) 16- 25 E10.3 cm sigij Integrated absorption cross section at 296K (1) 36- 40 F5.4 --- gamAir Air-broadening parameter at 296K (in cm-1/atm) 41- 45 F5.4 --- gamSelf [0.125] Self-broadening parameter at 296K (in cm-1/atm) 46- 55 F10.4 cm-1 E" Lower state energy 56- 59 F4.2 --- nAir [1] Temperature dependence exponent (2) 60- 67 F8.6 --- delAir [0] Air pressure induced line shift at 296K (in cm-1/atm) 68- 70 I3 --- V' [19,46] Upper vibrational state (3) 71- 73 I3 --- V" [14,44] Lower vibrational state (3) 74- 76 I3 --- J' [0,46] Upper J level rotational quantum number 77- 78 I2 --- K' [-1,23] Upper K level rotational quantum number 79- 80 I2 --- sig' [0,3] Upper σ level torsional quantum number 81- 82 I2 --- l' [-1/1] Upper l level vibrational angular momentum quantum number 83- 85 I3 --- J" [0/45] Lower J level rotational quantum number 86- 87 I2 --- K" [0/22] Lower K level rotational quantum number 88- 89 I2 --- sig" [0/3] Lower σ level torsional quantum number 90- 91 I2 --- l" [0] Lower l level vibrational angular momentum quantum number 92 I1 --- Ierr1 [2,4] Uncertainty index for line position (4) 93 I1 --- Ierr2 [3,5] Uncertainty index for integrated absorption cross section (4) 94 I1 --- Ierr3 [1] Uncertainty index for the air-broadening parameter (4) 95- 96 I2 --- Iref1 [0] First reference index (4)(5) 97- 98 I2 --- Iref2 [0] Second reference index (4)(5) 99-100 I2 --- Iref3 [0] Third reference index (4)(5)
Note (1): In units of cm-1.(cm2/molecule). Note (2): Of the air-broadening parameter. Note (3): With 14 = ground state, 17 = 41, 19 = 91, 38 = 4191, 44 = 42, 45 = 4291, 46 = 43 (ni represents the vibrational state vn = i). Note (4): See details in Rothman, et al. (2005, J. Quant. Spectrosc. Radiat. Transfer, 96, 139). Note (5): Not used in this work.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-May-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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