J/A+AS/103/83 Line identifications in a fireball spectrum (Borovicka 1994)
Line identifications in a fireball spectrum
Borovicka J.
<Astron. Astrophys. Suppl. Ser. 103, 83 (1994)>
=1994A&AS..103...83B 1994A&AS..103...83B
ADC_Keywords: Comets; Spectroscopy
Keywords: meteors: spectra - line: identification
Abstract:
305 emission lines were found in a spectrum of a fireball of -9th
magnitude. The identification of most of the lines is given. Also a
detailed tracing of the spectrum in the range 3600-6600Å is
presented. The tracing contains also computed synthetic spectrum and
both spectra can be easily compared. The following species were found
in the spectrum: Fe I, Na I, Mg I, Al I, Ca I, Ti I, Cr I, Mn I, Ni I,
Mg II, Si II, Ca II, Fe II, FeO, probably also Si I, Ba II, C2, and
possibly V I, Co I, Cu I, Ti II. The presence of other chemical
elements in meteor spectra is discussed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 475 Identifications of spectral lines observed in
the spectrum of the bright meteor EN 151068
spec-a.dat 15 2020 *Observed calibrated spectrum in the range
3575-4080Å at the meteor point 15F (2nd order)
spec-b.dat 15 1477 *Observed calibrated spectrum in the range
4050-4420Å at the meteor point 19F (2nd order)
spec-c.dat 15 8800 *Observed calibrated spectrum in the range
4400-6600Å at the meteor point 13F (1st order)
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Note on spec-a.dat, spec-b.dat, spec-c.dat:
The point 13F is the brightest meteor point. The short wavelengths
were, however, better observable in the second order spectra at
different meteor points and these spectra were used for line
identifications. The spectra at different points cannot be simply
joined, because the meteor brightness and physical conditions were
different at different points. The data given in these three files
were used for drawing the solid line in Fig.4 of the paper.
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- No [1,305]+= Line number (1)
4- 10 F7.1 0.1nm LamObs Observed wavelength
11- 19 F9.2 0.1nm LamLab ? Laboratory wavelength
22- 34 A13 --- Atom Identification: atom and multiplet or
molecule and vibrational band or
"?" for an unidentified line
35- 39 F5.2 eV E1 ?lower excitation potential
40- 46 F7.2 --- log(gf) ? oscillator strength
47- 53 F7.2 100W/sr Icom ?computed line intensity
54- 60 A7 --- Rem Remark (2)
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Note (1): One observed line may be formed by several lines.
Note (2): the numbers have the following meaning:
1) contribution of Fe II 4583.85 A ?
2) possible contribution of C III - 1
3) contribution of C_2
4) only fragment?
5) cannot explain the whole line
6) overexposed line
p.: point (boundaries of meteor points used are marked)
2nd: 2nd second spectrum
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Byte-by-byte Description of file: spec-a.dat spec-b.dat spec-c.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 0.1nm Lambda Wavelength (valid for the main piece)
8- 15 F8.4 kW/nm/sr OIR Observed intensity of radiation (including
the radiation of the fragments)
in 10+9erg/s/A/sr
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(End) Patricia Bauer [CDS] 13-Jan-1994