1. The SKADS sky and databases F. Levrier, R. Wilman, D. Obreschkow, H.-R. Klöckner, S. Rawlings (Oxford Astrophysics) D. Olteanu, S. Young (Oxford e-Research Center) DS2-T1 MEETING LISBON JANUARY 7, 2008

2. ASCII files large quantities of data (~45 Gb) Output from continuum and line simulations Source typeSourcesComponents Radio-quiet AGN36,132,5661 FRI23,853,1343 FRII2,3545 “Normal” galaxies168,046,3301 Starburst galaxies7,267,3821 Example: continuum simulations - 235,301,766 sources

3. Data distribution and map making Query data based on position, source type, flux limit... Requires database structure (MySQL / PostgreSQL) Continuum simulations database + HI line simulations database For each database : source tables + cluster table Example: continuum simulations database Source tableCluster table Unique source index per substructure NULL values for Q,U,V fluxes Max. number of entries per table: 1,000,000

4. Making the SKADS continuum sky Read structure information position - size - orientation - reference fluxes Input map parameters region - source types - resolution - frequency - flux limit Query databases Build template image Compute flux Scale template image Paste into full map

5. Making the SKADS HI line sky (I) First approach @ low resolution : synthetic spectra HI flux Synthetic double-peaked shape

6. Galaxy models made of “clouds” Placed according to density profile Orbiting according to velocity curve 5 galaxy types (spirals and irregulars) 46 inclination values (0-90 degrees) 5 asymptotic velocities Making the SKADS HI line sky (II) Second approach @ high resolution : template cubes from R. Boomsma S0-Sab scale / rotate / paste

7. Map Maker Standalone application in Python / IDL SQL/Python interface FITS output

8. Central square degree of the continuum simulations Radio-quiet AGNFR IFR II “Normal” galaxiesStarburst

9. Where we stand, where we’re going Database implementation IDL to python conversion of Map Maker Release of central square degree data in the test phase (~100 Mb) http://webmail.jb.man.ac.uk/skadswiki/ContsimVersion4 http://webmail.jb.man.ac.uk/skadswiki/ContsimVersion4 Testing of simulation output (T. Mauch, F. Abdalla, T. Kitching) Hosting of the database server by OeRC Implementation of web interface for database and imaging queries Release of Map Maker Release of the full simulations Interface with a MeqTrees sky model

10. MeqTrees interfaces with AIPS++ Measurement Sets, but it doesn’t build them from scratch Local MS generator: python interface to a glish script from T. Willis Can use existing configurations or generate random ones Measurement Set Generator