Science Applications of Montage: An Astronomical Image Mosaic Engine ESTO 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

IAU Prague, SPS3-52, August 2006 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 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 Montage Customers and Applications 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 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 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 Applications - VISTA Visible and Infrared Survey Telescope for Astronomy (2007) 4-m class imaging survey telescope in Chile 67-million pixel camera (1.6 deg FoV) x2048 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 Observing Mode

IAU Prague, SPS3-52, August 2006 SAGE: Spitzer Survey of the Large Magellanic Cloud Instrument Bands (  m) Field-of-View (arcmin) IRAC3.5, 4.5, 5.8, x 5.2 MIPS245.4 x x x 0.5 Two epochs: 1.Oct/Nov 05 Two epochs: Jul/Aug 05 & Oct/Nov 05 IRAC 3.6  m IRAC 8.0  m MIPS 24  m Images Courtesy Margaret Meixner (PI)

IAU Prague, SPS3-52, August 2006 Image Access and Visualization Services at IRSA Finder Chart - on-request 3-color images from SDSS, 2MASS, and DSS. Example: 3-color DSS image of NGC 5584 Generate three color preview images of Spitzer data ngc4450 IRAC 3-Color ngc4450 Optical 3-Color Preview 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 An On-Request Compute Service Enter mosaic request Monitor job status View messages View and download mosaic

IAU Prague, SPS3-52, August 2006 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 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 Right: M51. Composite of of 2MASS, DPOSS AND SDSS images computed on the Teragrid with the Montage on-request service.