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| Montage (software) | |
|---|---|
| Name | Montage |
| Developer | NASA, Caltech, IPAC |
| Released | 2002 |
| Programming language | C, Python |
| Operating system | Linux, macOS, Windows |
| Genre | astronomy image mosaic toolkit |
| License | BSD license |
Montage (software) Montage is a toolkit for assembling astronomical images into mosaics, designed to preserve astrometric fidelity and photometric calibration. It integrates utilities for image reprojection, background rectification, and co-addition used by projects at NASA, Caltech, and observatories such as the Infrared Processing and Analysis Center and National Optical Astronomy Observatory. Montage is widely employed by missions and facilities including Spitzer Space Telescope, WISE, Sloan Digital Sky Survey, Two Micron All Sky Survey, and Hubble Space Telescope for science-quality mosaics.
Montage provides modular components to reproject, background-match, and co-add FITS images for science missions such as James Webb Space Telescope, Euclid, Nancy Grace Roman Space Telescope, GALEX, and surveys like Pan-STARRS, DESI Legacy Imaging Surveys, and VISTA. The toolkit outputs mosaics that maintain World Coordinate System (WCS) standards developed by International Astronomical Union working groups and interoperates with libraries from Space Telescope Science Institute, Astropy Project, NASA/IPAC Infrared Science Archive, and VO protocols. Montage supports scripting and workflow engines used by Pegasus Workflow Management System, Apache Airflow, and supercomputing centers at NERSC and NASA Ames Research Center.
Montage originated in the early 2000s as a collaboration among NASA, IPAC, and Caltech to meet mosaic needs for missions such as Spitzer and surveys like 2MASS. Early funding and development involved partnerships with Jet Propulsion Laboratory, National Science Foundation, and projects at University of Arizona and University of California, Berkeley. Successive releases incorporated contributions from engineers familiar with WCSTools, CFITSIO, SExtractor, and the Astropy ecosystem. Montage development tracked advances in grid and cloud computing promoted by Open Science Grid, XSEDE, and cloud providers such as Amazon Web Services and Google Cloud Platform for large-scale reprocessing of archival data.
Montage is composed of command-line modules for tasks including image reprojection, background modeling, and co-addition, relying on standards like FITS and WCS. Core utilities leverage algorithms comparable to those used by DrizzlePac and services at MAST and IRSA; they integrate with image-processing tools such as SWarp, Montage's mProject', and visualization systems like DS9. The architecture supports parallel execution on clusters managed by SLURM, PBS, and workflow systems such as Pegasus. Montage exposes bindings for Python to interoperate with analysis libraries like NumPy, SciPy, and Matplotlib, and can be embedded within environments at institutions such as Caltech IPAC and Space Telescope Science Institute.
Montage has been used to produce mosaics for legacy archives including IRSA, MAST, HEASARC, and survey portals for SDSS, LSST Science Collaboration, and Euclid Consortium. Astronomers use Montage for constructing wide-field mosaics in studies associated with galaxy evolution, star formation, and mapping of objects discovered by GALEX and WISE. Montage supports pipeline processing for observatories like NOIRLab, ESO, and missions including Spitzer, enabling multiwavelength image combination for teams at Harvard-Smithsonian Center for Astrophysics, Max Planck Institute for Astronomy, and University of Cambridge research groups.
Montage scales from desktop use to high-performance computing environments at facilities such as NERSC, Argonne National Laboratory, and Oak Ridge National Laboratory. Benchmarks compare Montage reprojection and co-addition performance with tools like SWarp and custom pipelines used by LSST Project and DES. Parallelization strategies exploit distributed filesystems and message-passing libraries employed at centers like TACC and cloud infrastructures provided by Amazon Web Services and Google Cloud Platform to process terabyte-scale archives for projects such as WISE All-Sky and 2MASS.
Montage is distributed under permissive terms similar to the BSD license, with source code available to institutions including NASA, Caltech, and community repositories used by the Astropy Project and GitHub. Binary packages and container images are maintained for platforms like conda-forge, Docker Hub, and package systems supported by Debian and Red Hat. Montage releases and documentation are distributed through portals at IPAC, NASA, and portals used by the International Virtual Observatory Alliance.
The scientific community including researchers at European Southern Observatory, NOIRLab, Max Planck Society, and universities such as Princeton University and University of Chicago have adopted Montage for archive mosaicking. Workshops and tutorials have been presented at conferences hosted by American Astronomical Society, SPIE, ADASS, and IAU symposia. Contributions and issue tracking occur via collaboration platforms used by groups at Caltech, NASA Ames Research Center, and the Astropy Project community, with citations in publications from The Astrophysical Journal, Astronomy & Astrophysics, and Monthly Notices of the Royal Astronomical Society.
Category:Astronomy software