1. An Astronomical Image Mosaic Service for the National Virtual Observatory http://montage.ipac.caltech.edu

2. Les Montagiers Bruce Berriman IPAC Bruce Berriman IPAC Attila Bergou JPL Attila Bergou JPL Ewa Deelman ISI Ewa Deelman ISI John Good IPAC John Good IPAC Joseph Jacob JPL Joseph Jacob JPL Daniel Katz JPL Daniel Katz JPL Carl Kesselman ISI Anastasia Laity IPAC Thomas Prince Caltech Gurmeet Singh ISI Mei-Hui Su ISI Roy Williams CACR

3. What is Montage? Delivers custom, science grade image mosaics Delivers custom, science grade image mosaics User specifies projection, coordinates, spatial sampling, mosaic size, image rotation User specifies projection, coordinates, spatial sampling, mosaic size, image rotation Preserve astrometry & flux Preserve astrometry & flux Modular “toolbox” design Modular “toolbox” design Loosely-coupled Engines for Image Reprojection, Background Removal, Co-addition Loosely-coupled Engines for Image Reprojection, Background Removal, Co-addition Control testing and maintenance costs Control testing and maintenance costs Flexibility; e.g custom background algorithm; use as a reprojection and co-registration engine Flexibility; e.g custom background algorithm; use as a reprojection and co-registration engine Implemented in ANSI C for portability Implemented in ANSI C for portability Public service will be deployed on the Teragrid Public service will be deployed on the Teragrid Order mosaics through web portal Order mosaics through web portal

4. Public Release of Montage  Version 1.7.1 available for download at http://montage.ipac.caltech.edu User’s Guide including caveats User’s Guide including caveats Emphasizes accuracy in photometry and astrometry Emphasizes accuracy in photometry and astrometry Images processed serially Images processed serially Tested and validated on 2MASS 2IDR images on Linux Red Hat 8.0 (Kernel release 2.4.18-14) on a 32-b it processor Tested and validated on 2MASS 2IDR images on Linux Red Hat 8.0 (Kernel release 2.4.18-14) on a 32-b it processor Tested on 10 WCS projections with mosaics smaller than 2 x 2 degrees and coordinate transformations Equ J2000 to Galactic and Ecliptic Tested on 10 WCS projections with mosaics smaller than 2 x 2 degrees and coordinate transformations Equ J2000 to Galactic and Ecliptic Code metrics Code metrics 20 modules; 7560 Lines of code 20 modules; 7560 Lines of code 2595 test cases executed; 119 defects reported and 116 corrected 2595 test cases executed; 119 defects reported and 116 corrected

5. Applications of Montage GLIMPSE SIRTF Legacy Team GLIMPSE SIRTF Legacy Team Large scale infrared mosaics of the Galactic Plane Large scale infrared mosaics of the Galactic Plane Co-registration of 2MASS J, H, K and MSX 8  m images Co-registration of 2MASS J, H, K and MSX 8  m images Quality Assurance of GLIMPSE SIRTF data Quality Assurance of GLIMPSE SIRTF data

6. Applications of Montage SWIRE SIRTF Legacy team SWIRE SIRTF Legacy team Wide area of imaging survey of high galactic latitude fields Wide area of imaging survey of high galactic latitude fields Evolution of stellar populations up to z=3 Evolution of stellar populations up to z=3 Co-registration of 2MASS and SIRTF Infrared Array Camera (IRAC) images Co-registration of 2MASS and SIRTF Infrared Array Camera (IRAC) images Simulations, mission planning & pipeline testing Simulations, mission planning & pipeline testing

7. E/PO “Cool Cosmos” http://coolcosmos.ipac.caltech.edu/ http://coolcosmos.ipac.caltech.edu/ http://coolcosmos.ipac.caltech.edu/ Montage generates image mosaics at a single color Montage generates image mosaics at a single color Photoshop used to combine them into multi-color images Photoshop used to combine them into multi-color images

8. Montage: The Grid Years Re-projection is slow (100 seconds for one 1024 x 512 pixels 2MASS image, single processor 1.4 GHz Linux box), so use parallelization inherent in design Re-projection is slow (100 seconds for one 1024 x 512 pixels 2MASS image, single processor 1.4 GHz Linux box), so use parallelization inherent in design Grid is an abstraction - array of processors, grid of clusters, … Grid is an abstraction - array of processors, grid of clusters, … Montage has modular design - run on any environment Montage has modular design - run on any environment Prototype architecture for ordering a mosaic through a web portal Prototype architecture for ordering a mosaic through a web portal Request processed on a computing grid Request processed on a computing grid Prototype uses the USC-ISI/Wisconsin Grid Prototype uses the USC-ISI/Wisconsin Grid In operations will use the Distributed Terascale Facility (“The Teragrid”) In operations will use the Distributed Terascale Facility (“The Teragrid”)

9. Montage: The Grid Years cont Prototype version of a methodology for running on any “grid environment” Prototype version of a methodology for running on any “grid environment” Many parts of the process can be parallelized Many parts of the process can be parallelized Build a script - directed acyclical graph (DAG) - that enables parallelization Build a script - directed acyclical graph (DAG) - that enables parallelization Describes flow of data and processing Describes flow of data and processing Describes which data are needed by which part of the job Describes which data are needed by which part of the job Describes what is to be run and when Describes what is to be run and when DAG is submitted to standard tools for execution DAG is submitted to standard tools for execution

10. Example: Build a Mosaic of M101 2MASS 2IDR Images 1.5 degrees on a side; 100 images

11. M101 Mosaic: 2MASS J band

12. 1 2 3 mProject 1mProject 2mProject 3 mDiff 1 2mDiff 2 3 D 12 D 23 mFitplane D 12 mFitplane D 23 mBgModel ax + by + c = 0dx + ey + f = 0 a 1 x + b 1 y + c 1 = 0 a 2 x + b 2 y + c 2 = 0 a 3 x + b 3 y + c 3 = 0 mBackground 1mBackground 2mBackground 3 123 mAdd Final Mosaic DAG for Montage 1 2 3

13. Montage on the Grid Pegasus Montage Workflow Specification (abstract) Grid Information Systems Information about available resources, data location Grid Condor DAGMan Maps an abstract workflow to an executable form Executes the workflow

14. Summary Version 1.7.1 released Version 1.7.1 released Serial processing Serial processing Used or adapted by Atlasmaker, SWIRE, GLIMPSE, IPAC E/PO Used or adapted by Atlasmaker, SWIRE, GLIMPSE, IPAC E/PO Developing grid architecture Developing grid architecture Prototype version exploiting parallelization in Montage design Prototype version exploiting parallelization in Montage design Operational version Spring 2004 Operational version Spring 2004