Anita Richards and members of MERLIN, RadioNet and AstroGrid teams. ● 'Old' radio archive access ● Source lists, fixed images or visibility data ● Most maps only inner few arcsec, fixed resol n ● MERLIN archive on-demand imaging ● via AstroGrid, using ParselTongue ● Next-generation interferometry ● Archive development strategies ● VO requirements ● Enable all astronomers to use multi-l data On-demand radio imaging access to calibrated data for all astronomers
Flexible data products GB – TB raw data per experiment (mins - weeks) Visibility data Cal sources. antennas etc. Domain-specific software No unique product Resolution v. sensitivity tradeoff by baseline weighting 3D/polarisation cubes, spectra, time series... Field of view e.g. 8', image pixels 10 mas Map out regions of interest, usually not all 10 9 pixels Most PI results too varied to archive Pipeline data for VOs Quick Look static images Flexible products to order Raw data option rarely wanted if alternatives!
Interferometry visibility amplitude v. baseline length Calibrated, binned visibility amplitudes Quick-look image Data cube First Moment Data examples
IR from warm dust in remnant AGB shell (IRAS, ISO, 2MASS) Non-thermal nebular radiocontinuum (various - Vollmer catalogue) Hot stellar emission FUSE, IUE Non-expert access pre Major surveys e.g. FIRST Ready-made FITS images Aladin Catalogues: SpecFind
MERLIN 2005 Web forms: static images Calibrated visibility data Visibilities live on disc, calibrated Sample products User version of pipeline Still need AIPS
What's wrong with that? Dedicated web site fine for PIs of major projects Able to use domain-specific projects Even PIs look at pipeline calibration/images first! Not really friendly for non-experts Not convenient for multi-wavelength Can't be used easily in workflows Need VO access Single interface to many archives Standard metadata Static quick-look products Flexible data products ATCA prototype imager used VO model
2006 AstroGrid Workbench MERLINImager Simple inputs Name/ Pos (Size Resln Freq Date)
User AstroGrid Workbench Task Launcher MERLINImager Position, size, n, resol n, date Registry CEA JBO server Python (perl/dbi) ParselTongue Select AIPS data Image best 5 (calibration, fov) FITS images, logs, to public HTML area SIAP VOTable2006 AstroGrid Task RadioNet package MERLINImager MySpace Aladin, TopCat Download
Start AIPS No SPLIT with/out channel averaging (f.o.v. required) Fix known polarization etc. bugs - heuristics Reweight, set beam/pixel size Run IMAGR incl. field centre Run SUBIM if necessary Save to disc/web area Write metadata to Simple Image Access Protocol VOTable Using parselTongue
Interoperability (Plastic) Matching resolution Spectral index image 18 cm 6 cm Steep spectrum – SE not AGN HST 110,160, 220
Coming soon: M+VLA HDF(N) cutouts 1” 10 mJy contours + X-ray selected AGN2 1 < z < AGN Starburst with AGN core Starburst
Next Generation Interferometers e-MERLIN, eVBLI, EVLA ATCA/LBA, LOFAR, GMRT, ALMA, SKA etc Committed to VO access Software development RadioNet – ParselTongue (Python over e.g. AIPS) NRAO – CASA (aips++ based, Python scripting). ESO – XML binary and metadata storage 'B2E' obs-to-archive integrated data path Metadata retrieval Flexible remote processing of products VO components in archive management? Cornish, GMRT, MMB and other surveys
Beginning-to-End (B2E) Science proposal Science products Schedule Quality control Basic irreversible correlation, calibration etc. Capture data and intentions Public access Standard calibration pipeline Steerable pipeline Processing history, metadata Archive Re-extraction recalibration etc Key projects Major surveys Standard products documented methods
Data model Mkn 18 cm Data model Mkn 18 cm
Development of VO access Expand/apply VO standards Spatial frequencies, polarization... Tools for radio data (Jy/beam, 3+D cubes...) Authentication Expand data products/services available Robustness Visibility data, spectra, time series Single-dish data Image cutouts for Deep Fields Solve queuing/overload and other problems Impliment at other sites/other radio datasets
AstroGrid/RadioNet workshop Radio data management Dec– Dec Workshop for data providers/large surveys etc. Data flow using archives and pipelines ParselTongue, Common Proposal Tool etc. Archive management Data delivery Publishing data to VOs Use and development of VO tools & standards Science use Dec – Dec