US National Gemini Office

Users Support Portal

The US National Gemini Office (US NGO) main goal is to support US Gemini Users in the phases of the astronomical observing cycle, from proposal preparation through data analysis. This page is the main portal to all information for the different phases, connecting to specific Gemini pages, where users can find definitive contents on instruments and modes. This page also contains tools for data reduction and analysis for the entire Gemini community.



Important information about using the GMMPS software on macOS Catalina and Big Sur: read instructions here.


Winter AAS 237 Splinter Session: Extragalactic Astronomy with Gemini Large and Long Programs. Access the speaker line-up and full presentations in our workshop page.


The US National Gemini Office is now on Twitter: The US NGO started another channel of communication with the US Gemini community. Posts will include relevant information about upcoming deadlines, software/instrument updates, program completion, publications, and much more. Follow the US NGO on Twitter @usngo!







Gemini Data Analysis

Click here for information and links on data download, data format, software installation, and additional resources.

Gemini Science Instruments

Get curated resources on data reduction for your favorite instrument:

Data Reduction Tutorials - Github Repositories

Our tutorials are based on the examples provided by the Gemini/DRAGONS team. The links below will take you to the repositories with examples and extended help files:

  • DRAGONS: Jupyter notebooks (using the DRAGONS Python API)
  • IRAF: Gemini/IRAF scripts


About Us

The US NGO is a group within the Community Science and Data Center (CSDC) at the NSF's NOIRLab. For questions, comments, and/or feedback, you can send us an email at or a direct message on Twitter. For further information about the US NGO members and collaborators, please visit our people page.