Sloan et al.: Catalog of SWS spectra

Catalogs of infrared spectral classifications

Full-scan AOT1 spectra in the SWS database

This catalog was published by Kraemer et al. 2002. It includes all sources observed by the Short Wavelength Spectrometer aboard ISO using observing template AOT1.

Table of SWS classifications: (ASCII, 109k), (column definitions and notes)

Key to table of SWS classifications:

Column  Contents (some notes apply only to the ASCII version)
 1      name (Greek letters spelled out, note 'mu' and 'nu')
 2      TDT number
 3      RA (J2000)
 4      Dec (J2000)
 5      infrared spectral classification (defined below and in paper)
 6	notes (defined below and in paper)

The classifications consist of two parts, plus suffixes.

Level 1 classes are based on the overall shape of the spectrum and thus the temperature of the dominant emitter.

  1.  naked star
  2.  star associated with dust
  3.  warm dusty object with little or no stellar contribution
  4.  cool dusty object
  5.  red spectrum rising to 45 um
  6.  no continuum
  7.  flawed spectrum

Level 2 classification identifies the dominant spectral features with 1-3 letters.

  CE   carbon-rich dust emission, dominated by SiC at 11.5 um
  CN   carbon-rich proto planetary nebula
  CR   reddened continuum from amorphous carbon
  CT   carbon-rich spectrum showing the 21 um feature
  E    emission lines are the only significant spectral feature
  F    featureless (Groups 4 and 5)
  M    miscellaneous
  N    naked star, no molecular bands (Group 1 only)
  NO   naked star with oxygen-rich molecular bands (Group 1 only)
  NC   naked star with carbon-rich molecular bands (Group 1 only)
  NE   naked star with emission lines (Group 1 only)
  NM   a miscellaneous group of naked stars (Group 1 only)
  PN   planetary nebula, many emission lines
  PU   as PN, but with UIR features
  SA   oxygen-rich dust, 10 um silicate absorption
  SB   oxygen-rich dust, self-absorbed silicate emission at 10 um
  SC   crystalline silicate emission, especially at longer wavelengths
  SE   oxgyen-rich dust emission at 10-12 um
       Group 2.SE is subdivided as follows:
       2.SEa  broad low-contrast dust feature from alumina
       2.SEb  structured silicate emission
       2.SEc  classic narrow silicate emission
  SEC  crystalline silicate emission at 10-11 um and to the red
  U    UIR emission features dominate the spectrum
  W    spectrum peaks 5-8 um, drops to red, many are WR stars
  C/SE silicate/carbon stars
  C/SC mixture of carbon-rich and crystalline silicate features
  U/SC mixture of UIR and crystalline silicate features

Suffixes:

  e    emission lines
  p    peculiar
  u    UIR features present
  :    uncertain classification
  ::   very uncertain classification

Key to notes:

  F       quality flag such as pointing or telemetry problems 
  G       extragalactic source 
  W       wrong coordinates; o: probably an off, but odd in some way
  R, R:   possibly a recoverable group 7 
  H       probably irrecoverable in group 7
  Offset  name includes offsets from nominal position indicated by (0,0)
  Propn   name from original observer

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