VII/141 Spectrophotometric Atlas of Galaxies (Kennicutt Jr. 1992)
A Spectrophotometric Atlas of Galaxies
Kennicutt Jr. R.C.
<Astrophys. J. Suppl. Ser. 79, 255 (1992)>
=1992ApJS...79..255K 1992ApJS...79..255K
ADC_Keywords: Galaxies, nearby; Galaxies, spectra; Spectrophotometry
Description:
This catalog contains 56 spectra: 55 galaxy spectra, and one night sky
spectrum, which is included for users wishing to check for low-level
spurious features in the galaxy spectra. The file "spectra.dat"
contains a summary of the spectra. The user should consult the paper
for details of the observations and a discussion of the limitations of
the spectrophotometry.
The spectra are integrated measurements made with apertures comparable
to the diameters of the galaxies. The original spectra have been
combined, rebinned to a common wavelength scale, and normalized in
flux to unity at a reference wavelength of 555nm. An atmospheric
extinction correction has been applied to the data, but otherwise they
are not corrected for reddening, redshift, etc. The spectral range
covered is 365-710 nm and the resolution is 5-8Å. Each spectrum
consists in 1726 normalized flux values spaced each 2Å, stored as a
file in the subdirectory "sp".
Tests show that the spectrophotometry is accurate to the few percent
level over small wavelength regions, and at the 10% level over the
entire wavelength range. Although the data are useful for a variety of
applications, the user should be forewarned that they may not be
suitable for applications requiring precision colors over a long
wavelength baseline (e.g., computation of K-corrections, some spectral
synthesis applications).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
spectra.dat 52 56 List of spectra (55 galaxies + night sky)
sp/* . 56 *Subdirectory containing the 56 spectra
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Note on sp/*:
Each spectrum contain the 1726 flux values, ordered in increasing
wavelength with a step of 0.2nm. Each line contains 10 points, with
the exception of line 173, which contains 6 points. In some cases the
original spectrum did not cover the entire 360-705-nm range, and at
those wavelengths a data value of 0.0000 is listed.
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Byte-by-byte Description of file: spectra.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Galaxy name (or SKY for the night sky)
12- 13 I2 h RAh ? Right Ascension J2000 (hours) (1)
15- 16 I2 min RAm ? Right Ascension J2000 (minutes) (1)
18- 21 F4.1 s RAs ? Right Ascension J2000 (seconds) (1)
23 A1 --- DE- ? Declination J2000 (sign) (1)
24- 25 I2 deg DEd ? Declination J2000 (degrees) (1)
27- 28 I2 arcmin DEm ? Declination J2000 (minutes) (1)
30- 31 I2 arcsec DEs ? Declination J2000 (seconds) (1)
35- 39 F5.2 mag Bmag ? B magnitude of galaxy (1)
41- 46 F6.4 --- z ? Redshift (1)
48- 52 A5 --- MType Morphological type (1)
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Note (1): is blank for the last record (SKY)
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
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1- 80 10F8.4 --- F/F550 ? Normalized Flux at wavelength
365+0.2*i (nm)
where i = index in range [0,1725]
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Historical Notes:
* 26-Sep-1991: catalog as a single file, with an original description
prepared by Dr. Robert C. Kennicutt, Jr.
* 22-Feb-1995: reformatted by Gail L. Schneider [SSDOO,ADC]
* 02-Aug-2004: added the file "spectra.dat" at CDS
September 26, 1991 reformatted to CDS standard.
(End) Francois Ochsenbein [CDS] 02-Aug-2004