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Proceedings Paper

Sherpa: a mission-independent data analysis application
Author(s): Peter Freeman; Stephen Doe; Aneta Siemiginowska
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Paper Abstract

The ever-increasing quality and complexity of astronomical data underscores the need for new and powerful data analysis applications. This need has led to the development of Sherpa, a modeling and fitting program in the CIAO software package that enables the analysis of multi-dimensional, multi-wavelength data. In this paper, we present an overview of Sherpa's features, which include: support for a wide variety of input and output data formats, including the new Model Descriptor List (MDL) format; a model language which permits the construction of arbitrarily complex model expressions, including ones representing instrument characteristics; a wide variety of fit statistics and methods of optimization, model comparison, and parameter estimation; multi-dimensional visualization, provided by ChIPS; and new interactive analysis capabilities provided by embedding the S-Lang interpreted scripting language. We conclude by showing example Sherpa analysis sessions.

Paper Details

Date Published: 1 November 2001
PDF: 12 pages
Proc. SPIE 4477, Astronomical Data Analysis, (1 November 2001); doi: 10.1117/12.447161
Show Author Affiliations
Peter Freeman, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Stephen Doe, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Aneta Siemiginowska, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 4477:
Astronomical Data Analysis
Jean-Luc Starck; Fionn D. Murtagh, Editor(s)

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