Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file spectra.dat 52 56 List of spectra (55 galaxies + night sky) sp/* 80 56 *Subdirectory containing the 56 spectra
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.
Byte-by-byte Description of file: spectra.dat
Bytes Format Units Label Explanations
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)
Note (1): is blank for the last record (SKY)
Byte-by-byte Description of file: sp/*
Bytes Format Units Label Explanations
1- 80 10F8.4 --- F/F550 ? Normalized Flux at wavelength 365+0.2*i (nm) where i = index in range [0,1725]
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
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

catalogue service