Implementing a VO archive for datacubes of galaxies
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The document describes implementing a VO archive for galaxy datacubes. It details collections of FITS files containing 2D spatial and spectral data on galaxies from two telescopes. A MySQL database stores metadata on the datasets extracted from FITS headers using IPython notebooks. The web interface allows discovering, viewing metadata, and accessing the data through use cases like moment maps and channel maps. The archive aims to provide characterization of emission lines and provenance to better understand the radio interferometric data.
Implementing a VO archive for datacubes of galaxies
- 1. Implementing a VO archive for datacubes of galaxies José Enrique Ruiz Instituto de Astrofísica de Andalucía – CSIC Sprint 2014 IVOA Interop May 20th 2014 - ESAC
- 4. Collections SMA B0DEGA Below 0 Degrees Galaxies • 30 FITS Files • Single Object / Single Line Emission • 2D Spatial + 1D Velocity + 1D Polarization • 12 CO 21 Molecular Transition WSRT WHISP Westerbork observations of neutral Hydrogen in Irregular and SPiral galaxies • 33 FITS Files • Single Object / Single Line Emission • 2D Spatial + 1D Frequency + 1D Polarization • HI 21cm Transition
- 5. Collections SMA B0DEGA Below 0 Degrees Galaxies • 30 FITS Files • Single Object / Single Line Emission • 2D Spatial + 1D Velocity + 1D Polarization • 12 CO 21 Molecular Transition WSRT WHISP Westerbork observations of neutral Hydrogen in Irregular and SPiral galaxies • 33 FITS Files • Single Object / Single Line Emission • 2D Spatial + 1D Frequency + 1D Polarization • HI 21cm Transition
- 6. Technologies • Linux Ubuntu 12.04 LTS Server • MySQL Community Server • Apache HTTP Server • Django Web Framework 1.6 • MySQL Workbench • IPython Notebooks Framework • Python Libraries and Software • Kapteyn Package • AstroPy • APLPy • PVExtractor • PySpeckit • yt project • GIPSY
- 7. Data ModelImage DM, ObsCore, Spectral DM FieldID – Type – UType – UCD – Description – FITS Group Name
- 8. Data Model Single-line / Single-object velocity data cubes Velocity associated to emission line Better Flux Characterization
- 9. Data Model Instrumental and Post processing Provenance Derived properties associated to the Target
- 10. Database ….
- 11. Database ….
- 12. Database ….
- 13. Database ….
- 14. Database Filling IPython Notebook Executable Recipe • Web tool executable in the browser • Imports a single Collection each time • Single-target single-line velocity data cubes of galaxies • Configuration of parameters for each Collection • Type, SubType, File Format, Calibration Level • Collection,Access Rights, Publisher, Contact, Creator, CreationType • Facilicity, Instrument, Bandpass, DataSource, Proposal • UCD/Unit Axis Characterization, Line Characterization • Fills a specific MySQL BDD structure • DataSets are FITS files placed in a specified folder • Configurable FITS headers mapping • Produces a SQL Script • Addition of Derived Metadata for Targets in a second step
- 15. Web Interface
- 16. Database Admin Django Web Framework Integrated Database Admin
- 17. Discovery
- 18. Response List
- 19. Record
- 20. Target and Derived Properties
- 21. Spatial and Spectral Characterization
- 24. Instrumental and Post Processing Provenance
- 25. Dataset Curation and Characterization
- 29. VOTables
- 30. 3D Exploration /Access Data Use Cases Collapsing the cube: Moment Zero Integrated Emission Range in velocity Range in flux Beam
- 31. 3D Exploration /Access Data Use Cases Collapsing the cube: Moment One Velocity Weighted Integrated Emission v Range in velocity Range in flux Beam
- 32. 3D Exploration /Access Data Use Cases Channel Maps and Contour Overlay Channel Slicing Range in velocity Range in flux Beam
- 33. Channel Slicing 3D Exploration /Access Data Use Cases Range in flux
- 34. Position Velocity at Fixed RA 3D Exploration /Access Data Use Cases Position Velocity at Fixed Dec Range in velocities Range in flux
- 35. Position Velocity at Defined Position Angle 3D Exploration /Access Data Use Cases Range in velocities Range in flux Position angle
- 36. Renzogram: 2D overlay of contour channels with different colors 3D Exploration /Access Data Use Cases Range in velocities Range in flux Position angle
- 37. Aperture Velocity Profile 3D Exploration /Access Data Use Cases Integrated Emission Radial Profile Spatial aperture Range in velocities Range in flux Range in velocities Range in flux Position angle Elliptical rings
- 38. Visualization as a service IPython implementation of yt-project software 3D Exploration /Access Data Use Cases
- 39. Conclusions • SIAv2 prototype/testbed evolving with in progress standards • Two different collections of single target /single line-emission velocity cubes of galaxies • Import from FITS into MySQL database with IPython executable notebook /tool • Web Interface for discovery and display of SIAv2/ImageDM UCDs and Utypes • accesData UseCases implemented as programmatic access services • Additions performed into DM to provide better knowledge of the dataSet: • Emission-line characterization (velocity and flux) • Post-processing provenance in radio interferometric cleaned datacubes • Archive-specific physical properties of Targets
- 40. LinksSIAv2 Prototype http://amiga.iaa.es:9000 IPython Notebooks Recipes Datafiller http://nbviewer.ipython.org/gist/Bultako/690e88d3548745ca194e Moments http://nbviewer.ipython.org/gist/Bultako/6522a416d749701d1310 Slicing Datacubes http://nbviewer.ipython.org/gist/Bultako/badb836e659599b104db Contour Overlays on Channel Maps http://nbviewer.ipython.org/gist/Bultako/73f82690e90e2dbb3d76 Renzograms /Contour Overlays on 2DImage http://nbviewer.ipython.org/gist/Bultako/11427424 Visualization with yt-project software package http://nbviewer.ipython.org/gist/bultako/11137094 jer@iaa.es bultako