GAS documentation¶
The GAS
package provides a full data reduction pipeline of the data
obtained by the GouldBelt Ammonia Survey (GAS) using the Green Bank Telescope.
It provides a uniform framework to reduce each region observed in a consistent fashion. At the moment, the GAS pipeline does the following:
- It runs the official calibration pipeline from GBT (https://github.com/nrao/gbt-pipeline/) on the raw data. This is done through an wrapper.
- Each spectral window and region (as defined in the observing log) are stored in a different directory.
- The imaging is done with our gridder, which generates a data cube using all the observations for a given window.
- A first look functionality. This allows for a quick look of the data, useful for quality assesment.
- Line fitting for all data is done using
pyspeckit
. In the case of NH3 the proper hyperfine model is used, while for the other lines a single Gaussian model is used.