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Science Applications of Montage: An Astronomical Image Mosaic Engine http://montage.ipac.caltech.edu/

CT PROJECT. ESTO. Science Applications of Montage: An Astronomical Image Mosaic Engine http://montage.ipac.caltech.edu/. G. Bruce Berriman, John Good and Anastasia Laity IPAC Joseph C. Jacob and Daniel S. Katz JPL Ewa Deelman, Gurmeet Singh and Mei-Hui Su ISI

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Science Applications of Montage: An Astronomical Image Mosaic Engine http://montage.ipac.caltech.edu/

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  1. CT PROJECT ESTO Science Applications of Montage: An Astronomical Image Mosaic Enginehttp://montage.ipac.caltech.edu/ G. Bruce Berriman, John Good and Anastasia Laity IPAC Joseph C. Jacob and Daniel S. Katz JPL Ewa Deelman, Gurmeet Singh and Mei-Hui Su ISI Roy Williams CACR, Thomas Prince Caltech

  2. History of Montage • Funded by NASA Earth Sciences Technology Office Compute Technologies Program to deliver an image mosaic engine for the National Virtual Observatory • Project deliverables completed 2/2005: • Mosaic engine available for download • Proof of concept that an on request image mosaic service can be deployed on the Distributed Terascale Facility (Teragrid using same code as used on desktops • NASA/IPAC Infrared Science Archive (IRSA) assumed responsibility for maintenance of the compute engine- Jan 2005 • National Virtual Observatory supporting the deployment of an operational on-request mosaic service on the Teragrid - Jan 2005 • IPAC supporting deployment dedicated on-request service for 2MASS for mosaics of size 3 deg x 3 deg or less IAU Prague, SPS3-52, August 2006

  3. Montage Architecture • Toolkit with stand-alone “core” processing modules for performing steps in producing an image mosaic that meets the user’s specifications • Reprojection of input FITS image • Supports all WCS projections • Preserves astrometry and calibration fidelity of input images • Rectification of background radiation to a common level • Co-addition of rectified, reprojected images in FITS format • Code distribution includes utilities such as: • Image cutouts, generation of browse JPEGs, determination of sky coverage of input files • Written in ANSI C for performance and portability • Highly scaleable • Use same compute engine on many environments - desktop, cluster, grid IAU Prague, SPS3-52, August 2006

  4. Montage Customers and Applications NEW • Visible and Infrared Survey Telescope for Astronomy (VISTA) (under evaluation) • Spitzer Space Telescope Legacy Projects • SWIRE - trace the evolution of dusty, star-forming galaxies, evolved stellar populations, and active galactic nuclei to redshifts of z ~ 3 • GLIMPSE - infrared survey of galactic plane to study global history of star formation and energetics of interstellar medium • SAGE - Surveying the Agents of a Galaxy’s Evolution (SAGE) -Spitzer Survey of the Large Magellanic Cloud: • COSMOS Hubble Treasury Program • Multi-wavelength studies of the large scale distribution of matter in the Universe • The INT/WFC Photometric H-alpha Survey (IPHAS) of the Northern Galactic Plane NEW IAU Prague, SPS3-52, August 2006

  5. Montage Customers and Applications -II • Spitzer Space Telescope Outreach • Generating as educational products distributed through the Cool Cosmos website • Generate mosaics in uncommon projections, often the best ones for E/PO products • Multi-Mission Archive at Space Telescope (MAST) • J-band 2MASS mosaics sources in the MAST Imaging Scrapbook • Accessible from MAST and from IRSA • NASA/IPAC Infra Red Science Archive • Creation of 3-color browse products, image cutout services • Stellar Archive and Retrieval System (StARS) (unreleased) • Database of stars that are candidates for having planets - Hipparcos catalog merged with stellar parameters from literature • Montage generated 2MASS “Finder Charts” for “Top 6000” candidates NEW IAU Prague, SPS3-52, August 2006

  6. Montage Customers and Applications -III • NSF National Virtual Observatory (NVO) • All Sky 2MASS mosaic • NVO Quick Sky Statistics Service • Generates images showing spatial coverage of astronomical catalogs at NED, IRSA and VizieR • Montage components used to determine sky coverage, and generate single-survey and composite-survey coverage maps SEE POSTER SPS6-8 IAU Prague, SPS3-52, August 2006

  7. Applications - VISTA Observing Mode Visible and Infrared Survey Telescope for Astronomy (2007) • 4-m class imaging survey telescope in Chile • 67-million pixel camera (1.6 deg FoV) • 16 2048x2048 arrays • Evaluation of Montage • Six stepped exposures fill a "Tile" with at least two exposures • Automated pipeline processes each "pawprint", • Montage is under evaluation as part of post-pipeline backend to stitch the pawprints together to create the tile • Compute the image geometry to high precision and co-add the individual images • Compensate for variability in sky conditions IAU Prague, SPS3-52, August 2006

  8. SAGE: Spitzer Survey of the Large Magellanic Cloud Two epochs: Oct/Nov 05 IRAC 3.6 m IRAC 8.0 m MIPS 24 m Two epochs: Jul/Aug 05 & Oct/Nov 05 Images Courtesy Margaret Meixner (PI) IAU Prague, SPS3-52, August 2006

  9. Image Access and Visualization Services at IRSA http://irsa.ipac.caltech.edu/ ngc4450 IRAC 3-Color Finder Chart - on-request 3-color images from SDSS, 2MASS, and DSS. Example: 3-color DSS image of NGC 5584 ngc4450 Optical 3-Color Preview Generate three color preview images of Spitzer data Image Cutouts - on-request image cutouts from all image data sets housed at IPAC. Example: MSX cutouts at Galactic Center IAU Prague, SPS3-52, August 2006

  10. An On-Request Compute Service Monitor job status Enter mosaic request View and download mosaic View messages IAU Prague, SPS3-52, August 2006

  11. Science Result - Verification of a Bar in the Spiral Galaxy M31 • Beaton et al. Ap J Lett in press • Montage used to generate 2MASS mosaic of M31 galaxy • Background rectification brings out “boxy bulge” - signature of bar IAU Prague, SPS3-52, August 2006

  12. Summary • Montage is in active use: • Generation of science products • Supporting scientific research • Performing “pathfinder” studies in image processing at scale • On-request service under will be publicly deployed in Winter 2006 • To learn more or download the distribution, visit the project web site at http://montage.ipac.caltech.edu/ Right: M51. Composite of of 2MASS, DPOSS AND SDSS images computed on the Teragrid with the Montage on-request service. IAU Prague, SPS3-52, August 2006

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