Data Reduction Software

DRAGONS v3.2 Released - GHOST and new GMOS-S CCDs Support

April 2nd, 2024

The latest version of DRAGONS (v3.2.0) was released on 1 April, 2024 and includes fully integrated support for GHOST and support of the new GMOS-S CCDs installed late 2023.  With this release, DRAGONS offers support for the science quality reduction of data from the GMOS, NIRI, GSAOI, and F2 imagers, as well as from the GMOS long-slit spectrograph (including nod-and-shuffle observations) and new GHOST high-resolution spectrograph.  To get the software or for  more information, please go to  Follow @

First pipeline reduced GHOST observations & available data

June 9th, 2023

We are pleased to present the first GHOST science observations that have been reduced with the GHOST pipeline. We are releasing the spectrum of XX Oph (Be + Red Supergiant; V= 8.59-10.2 mag) as an example to showcase the spectral range, spectral resolution, and overall quality of data that GHOST can provide in standard resolution mode (R=50000; with a total integration time of 240s, and a wavelength range of 347 to 1060nm).

PyRAF on Python 3

August 3rd, 2022

Following some collaboration with the "IRAF Community" project earlier this year, we are pleased to make available PyRAF 2.2.1, the first version to pass all our testing on Python 3. This runs roughly as fast as the Python 2 version, thanks to improvements by Ole Streicher.

This version is already included on the new IRAF VM for Apple machines (see yesterday's announcement). On Linux, it can be installed by specifying "python=3.7" instead of "python=2.7" in the "conda create" command -- see:

DRAGONS v3.0.3 Patch Release Available

July 8th, 2022

A patch release of DRAGONS is available. This patch adds better handling of the GMOS-S data following the January failure of amplifier #5. For that data, the whole amplifier is automatically masked as bad pixels ensuring that those pixels are not used in calculations. The patch also includes bug fixes, small improvements, and fixes to the documentation.

For a complete list of changes since v3.0.1 see:

Gemini IRAF v1.15 with new support for Flamingos 2 MOS

June 8th, 2022

A new version of Gemini IRAF v1.15 with new support for Flamingos 2 MOS (Multi-Object Spectroscopy) data is available.

Along with Flamingos 2 MOS support, the new release includes the changes added in the v1.14 patch released two months ago, as well as several other bug fixes.

The package is distributed via conda. See the installation instructions page for details.

Gemini IRAF Patch release for v1.14 to support new Flamingos 2 filters

April 19th, 2022

A patch release for Gemini IRAF v1.14 is available.

The replacement of two filters and the reshuffling of another in Flamingos 2 necessitated additions and modifications to lookup tables and modifications to the code. This patch release contains only the affected files. The patch is to be applied on-top of an already installed Gemini IRAF v1.14 package.

Installation instructions and content of the patch are available in gemini_v114_patch1.txt.