On-demand radio imaging On-demand radio imaging access to - PowerPoint PPT Presentation

On-demand radio imaging On-demand radio imaging access to calibrated data for all astronomers access to calibrated data for all astronomers 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- λ data

Flexible data products Flexible data products ✸ GB – TB raw data per ✸ Field of view e.g. 8', image experiment (mins - weeks) pixels 10 mas ✺ Visibility data ✺ Map out regions of interest, usually not all 10 9 pixels ✪ Cal sources. antennas etc. ✺ Domain-specific software ✺ Most PI results too varied ✸ No unique product to archive ✸ Pipeline data for VOs ✺ Resolution v. sensitivity ✺ Quick Look static images tradeoff by baseline ✺ Flexible products to order weighting ✺ 3D/polarisation cubes, ✺ Raw data option rarely wanted if alternatives! spectra, time series...

Interferometry Calibrated, visibility binned visibility amplitude v. amplitudes baseline length Data examples Data examples

Quick-look Interferometry image visibility amplitude v. baseline length Data examples Data examples

Data cube First Moment Interferometry visibility amplitude v. baseline length Data examples Data examples

✸ Non-expert IR from warm dust in IR from warm dust in remnant AGB shell remnant AGB shell access pre- (IRAS, ISO, 2MASS) (IRAS, ISO, 2MASS) 2006 ✺ Ready-made FITS images ✪ Aladin Non-thermal nebular Non-thermal nebular ✺ Catalogues: radiocontinuum radiocontinuum ✪ SpecFind Hot stellar emission Hot stellar emission (various - Vollmer (various - Vollmer FUSE, IUE FUSE, IUE catalogue) catalogue)

MERLIN 2005 MERLIN 2005 Web forms: static images Web forms: static images Calibrated visibility data Calibrated visibility data ✸ Visibilities live on disc, calibrated ✸ Sample products ✸ User version of pipeline ✺ Still need AIPS

What's wrong with that? 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 ✸ 2003-4 ATCA prototype imager used VO model

2006 2006 AstroGrid Workbench AstroGrid Workbench MERLINImager MERLINImager Simple inputs Name/ Pos (Size Resln Freq Date)

User Aladin, TopCat Download MySpace AstroGrid Workbench Task Launcher Registry MERLINImager Position, size, 2006 2006 ν , resol n , date AstroGrid Task AstroGrid Task CEA RadioNet package RadioNet package JBO server MERLINImager Python (perl/dbi) MERLINImager SIAP VOTable ParselTongue Select AIPS data FITS images, Image best 5 logs, to public (calibration, fov) HTML area

✸ Matching Interoperability (Plastic) Interoperability (Plastic) resolution ✺ Spectral index image 18 cm 6 cm HST 110,160, 220 Steep spectrum – SE not AGN

Coming Coming soon: soon: + + M+VLA M+VLA HDF(N) HDF(N) Starburst with cutouts AGN cutouts AGN core 1” 10 µ Jy contours + + X-ray + selected AGN2 Starburst Starburst 1 < z < 2.5

Next Generation Interferometers Next Generation Interferometers ✸ 'B2E' obs-to-archive ✸ e -MERLIN, eVBLI, EVLA integrated data path ATCA/LBA, LOFAR, ✺ Metadata retrieval GMRT, ALMA, SKA etc ✺ Committed to VO access ✺ Flexible remote ✺ Software development processing of products ✪ RadioNet – ParselTongue ✸ VO components in (Python over e.g. AIPS) archive management? ✪ NRAO – CASA (aips++ based, Python scripting). ✺ Cornish, GMRT, MMB ✪ ESO – XML binary and and other surveys metadata storage

Char DM Markarian 273 @ 18 cm Char DM Markarian 273 @ 18 cm General Spatial Temporal Spectral Observable frame/units ICRF, deg MJD MHz Jy/beam 13.123456 Location 50613.5 1658 undef +55.987654 12.92, +55.58 50613.0 0.0002 0.5 Bounds 1650 1665 13.32, +56.38 50614.0 (or function) 13.123456 (on-source Support +55.987654 scan listing 1650 1665 undef 0.4 URL) f (support, (bandpass Sensitivity undef 1 1ary beam) LUT URL) Filling Factor 1 0.7 0.93 undef 50 100 0” . 2 2”.0 Resolution 5 m 1000 kHz 0” . 2 2”.0 µ Jy/beam 0” . 04 0”.0625 Sampling 16 s 1000 kHz undef 0” . 04 0”.0625

Development Development ✸ 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 1400 5 Dec–1600 8 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 0900 4 Dec – 1300 5 Dec Oxford w/c 4 December 2006 Oxford w/c 4 December 2006 radiovo @ jb.man.ac.uk RadioNet/AstroGrid www's radiovo @ jb.man.ac.uk RadioNet/AstroGrid www's