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ELSA: An integrated, semi-automated nebular abundance package

Published online by Cambridge University Press:  15 December 2006

Matthew D. Johnson ,
Jesse S. Levitt ,
Richard B. C. Henry  and
Karen B. Kwitter
Matthew D. Johnson
Affiliation:
Department of Astronomy, Wesleyan University, Middletown, CT 06459, USA email: mdjohnson@wesleyan.edu
Jesse S. Levitt
Affiliation:
Department of Astronomy, Williams College, Williamstown, MA 01267, USA email: 08jsl@williams.edu, kkwitter@williams.edu
Richard B. C. Henry
Affiliation:
H. L. Dodge Department of Physics and Astronomy, U. Oklahoma, Norman, OK 73019, USA email: henry@nhn.ou.edu
Karen B. Kwitter
Affiliation:
Department of Astronomy, Williams College, Williamstown, MA 01267, USA email: 08jsl@williams.edu, kkwitter@williams.edu
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Abstract

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We present ELSA, a new modular software package, written in C, to analyze and manage spectroscopic data from emission-line objects. In addition to calculating plasma diagnostics and abundances from nebular emission lines, the software provides a number of convenient features including the ability to ingest logs produced by IRAF's splot task, to semi-automatically merge spectra in different wavelength ranges, and to automatically generate various data tables in machine-readable or LaTeX format. ELSA features a highly sophisticated interstellar reddening correction scheme that takes into account temperature and density effects as well as He II contamination of the hydrogen Balmer lines. Abundance calculations are performed using a 5-level atom approximation with recent atomic data, based on R. Henry's ABUN program. Downloading and detailed documentation for all aspects of ELSA are available at the following URL:

Keywords

planetary nebulae: generalmethods: data analysisISM: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 439 - 440
Copyright
© 2006 International Astronomical Union