J/A+A/585/A23 GOBASIC code (Rad+, 2016)
Global optimization and broadband analysis software for interstellar chemistry
(GOBASIC).
Rad M.L., Zou L., Sanders J.L. III, Widicus Weaver S.L.
<Astron. Astrophys. 585, A23 (2016)>
=2016A&A...585A..23R 2016A&A...585A..23R (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Models
Keywords: methods: data analysis - astrochemistry - line: identification -
molecular data
Abstract:
Broadband receivers that operate at millimeter and submillimeter
frequencies are necessitating the development of new tools for
spectral analysis and interpretation. Simultaneous, global,
multi-molecule, multi-component analysis is necessary to accurately
determine physical and chemical conditions from line-rich spectra
arising from sources like hot cores.
We aim to provide a robust and efficient automated analysis program to
meet the challenges presented with these large datasets.
We have written a program in the MATLAB numerical computing
environment for simultaneous global analysis of broadband line
surveys. This Global Optimization and Broadband Analysis Software for
Interstellar Chemistry (GOBASIC) uses the simplifying assumption of
local thermodynamic equilibrium (LTE) for spectral lineshape analysis.
GOBASIC achieves simultaneous, multi-molecule, multi-component fitting
for broadband spectra. The number of components that can be analyzed
at once is only limited by the available computational resources.
Analysis of subsequent sets of molecules or components is performed
iteratively while taking the previous fits into account. All features
of a given molecule across the entire window are fitted at once, which
is preferable to the rotation diagram approach because global analysis
is less sensitive to blended features and noise features in the
spectra. In addition, the fitting method used in GOBASIC is
insensitive to the initial conditions chosen, the fitting is
automated, and fitting can be performed in a parallel computing
environment. These features make GOBASIC a valuable improvement over
previously available LTE analysis methods.
Description:
The MATLAB source code, a self-explanotary tutorial (PDF) and a
detailed explanation of GOBASIC algorithm (PDF) are packed as an
tar.gz file.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
GOBASIC.tgz 512 900 GOBASIC source code
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Acknowledgements:
Susanna L. Widicus Weaver, swidicu(at)emory.edu
(End) S.L. Widicus Weaver [Atlanta, USA], P. Vannier [CDS] 15-Oct-2015