GOBASIC: Global Optimization and Broadband Analysis Software for Interstellar Chemistry

Brief Introduction

GOBASIC is designed for multi-component, simultaneous fit of spectral transitions in a broadband observational line survey. It is based on the JPL/CDMS molecular catalog information, local thermaldynamic equilibrium (LTE) and low opacity assumptions, and MATLAB® Global Optmization Toolbox.

The details of the program design and test results can be find in Radhuber M. L., Zou L., Sanders J. L. and Widicus Weaver S. L., "Global Optimization and Broadband Analysis Software for Interstellar Chemistry (GOBASIC)." Astron. & Astrophys., 2016, 585, A23. (View Paper) The GOBASIC version used in the paper is v4.4.

Version History

Our group actively maintains the code. Several internal versions had been updated prior to the publication of the paper.

The most updated version is v5.0.

Updates from v4.5:

Updates from v4.4:

Update history is also included in the code package

Download Code

Version 5.0

Version 4.5

Version 4.4


Using GOBASIC, one can fit all these molecules simultaneously. Total fit includes the sum of the flux from other molecules that are not labeled in this sample plot