stsdas.analysis.nebular

Tasks for analyzing nebular emission lines.

Notes

For questions or comments please see our github page. We encourage and appreciate user feedback.

Most of these notebooks rely on basic knowledge of the Astropy FITS I/O module. If you are unfamiliar with this module please see the Astropy FITS I/O user documentation before using this documentation.

The nebular package has been replaced in Python by the PyNeb package, documentation can be found here, with a homepage here. In this notebook we will simply list the equivalent Python task for the original IRAF task where possible.

Contents:

abund

Please review the Notes section above before running any examples in this notebook

abund - Derive ionic abundances relative to H+ in 3-zone nebula.

  • See the getIonAbundance function and section 1.9 of the PyNeb handbook.

ionic

Please review the Notes section above before running any examples in this notebook

ionic - Determine ionic abundance relative to H+.

  • see the Atom class in PyNeb

ntcontour-ntplot

Please review the Notes section above before running any examples in this notebook

ntcontour - Plot contours of N_e- or T_e-sensitive line ratios.

ntplot - Construct N_e vs. T_e plot for observed diagnostic ratios.

  • See section 2.4 of the PyNeb handbook.

redcorr

Please review the Notes section above before running any examples in this notebook

redcorr - Correct line flux for interstellar reddening.

  • See the RedCorr class in PyNeb.

temden

Please review the Notes section above before running any examples in this notebook

temden - Determine electron temperature or density from diagnostic ratio.

  • See section 1.11 of the PyNeb handbook.

zones

Please review the Notes section above before running any examples in this notebook

zones - Determine electron temps & densities in 3-zone nebula.

  • See the Atom object in PyNeb.

Not Replacing

  • at_data - Documentation on the atomic reference data. Derecated.
  • diagcols - Pset for zone temperature & density column names. Deprecated.
  • fluxcols - Pset for line flux column names. Deprecated.
  • nlevel - Documentation on the N-level atom approximation. Deprecated.