Data reduction

The GHOST data reduction pipeline is part of DRAGONS 3.2. Users are recommended to use the instructions provided in the DRAGONS webpages to install and run the pipeline. A tutorial can be found here. 
If you are having issues with your data or data reduction, please contact your program contact scientists, or email ghost_science@noirlab.edu 

GHOST Reduced Data

The US NGO, in collaboration with the SUSD and the GHOST instrument team, is leading a project to provide reduced spectra to PIs of GHOST programs (Queue, Directors Discretionary, Poor Weather, Fast Turnaround, Large and Long) from all partner countries, starting in the 2024A semester. Details are provided in Placco et al. (2024) and the reduced data can be accessed through the Gemini Observatory Archive. If you use the reduced spectra for your research, please cite Placco et al. (2024) in addition to the other standard Gemini acknowledgments.

Shared risk fast turnaround data

During the shared risk observations, the instrument was not focused correctly. An improved reduction algorithm that Gaussian-smooths the slit profile, and increases the extraction box width was added to GHOSTDR v1.1.0 to reduce this data. The only change with respect to the science verification data is to specify the smoothing scale when reducing the spectrograph flats (a value of 6 has been found to work well). Users are recommend to use DRAGONS 3.2 for thier data reduction. 

Science verification data 

Science verification data are best redcued with the DRAGONS 3.0 version, and the GHOST DR v1.1.0. Installation instructions and the tutorial can be found here.