1. Centre of Excellence for All-sky Astrophysics www.caastro.org MWA Project: Centre of Excellence for All-sky Astrophysics Centre of Excellence for All-sky Astrophysics www.caastro.org MWA Consortium: CurtinU, ANU, UMelbourne, SwinburneU, USydney, UWestern Australia, UTasmania, MIT, Harvard-Smithsonian CfA, ASU, UW, Raman Research Institute, CSIRO

2. MWA Project:

3. MWA: Science Goal: EoR Hydrogen 21cm line @ Z=6-13 80 - 230 MHz … to 320 MHz Statistical Detection through Power Spectrum: angular scales 4’ to 30’

4. MWA: Instrument Strategy: Geographic Location Large N / Small D (512/5m) Compact Array “Real-time System” Gianni! Science Goal: EoR Hydrogen 21cm line @ Z=6-13 80 - 230 MHz … to 320 MHz

5. Location of MWA Australia’s SKA site (infrastructure, etc)

6. The Shire of Murchison is a large agricultural region in the central part of Western Australia, and is the only shire in Australia without a town. Population: 114 (2009) Area: 41173 km² (15,897.0 sq mi) ~ Netherlands Strategy: less RFI lower power levels fewer bits lower bandwidths less complexity lower cost

7. Small D ~ 5m Chris Williams (for scale)

8. Hydra A 115 MHz 50 deg between nulls HPBW ~ 30 deg Field of View Small D => Large Field of View

9. Virgo A 3C273 Jan 2010 Field of View Small D => Large Field of View

10. “Small N” Aerial Photo of “Small N” = 32 Tile Prototype Array:

11. West-East [m] Locations of Antenna Tiles in 32T Array

12. Layout of Large N = 512 Tile Array (128 intermediate) COMPACT * Densely populated core for Surface Brightness sensitivity (!!!!!) * Ionospheric wobble treated as rubber sheet sky 1.5 km Strategy: less complexity lower cost

13. Correlator: FPGA based “hardware correlator” and fine Filter Bank (10KHz channels) Correlate all pairs => 130,816 Interferometer Baselines (Prototyping & Testing … baseband recorders, software filter banks, correlators, and beamformers, …)

14. Hydra A 115 Mhz Jan 2010

15. Hydra A 121 Mhz Chris Williams Sep 2010

16. Pictor A Parkes Catalog

17. Pictor A Parkes Catalog MWA Sources

18. 32T Image 114 MHz 21 57 05.8 -69 41 22 UV coverage ~ 10 x 2 min over wide HA range

19. Centaurus A

21. CenA Left: MWA contours on ACTA+PKS image Right: MWA 115MHz image

22. The Sun with MWA Comparison with X-ray observations

23. Solar Radio Bursts 170-200 MHz Oberoi, Matthews, et al

24. Grid of Radio Spectra across the face of the Sun Oberoi, Matthews, et al

25. Instantaneous 32T uv-coverage

26. Ord, Mitchell & Greenhill “2PiP” baseband recording system Vela Pulsar

27. Ord, Mitchell & Greenhill “2PiP” baseband recording system

28. MWA EoR Target Fields Chris Williams, MIT

29. MWA Future August 2011 - lay in the infrastructure December 2011 - lay tiles - populate CSIRO facility bldg (with correlator/RTS hardware) February 2012- place receivers June 2012 - 128T hardware installed - commissioning phase

30. Contrast between T b (Moon) and T b (Sky) T b (Sky) Non-thermal + EoR,etc T b (Moon) Thermal ~B.B. Experiment:  T b = T b ( moon ) - T b ( sky ) TbTb TbTb BB spectrum: smooth & known Not Smooth !?

31. Recent Data Sets… LOFAR … several long observations at Full Moon Nov, Dec, Jan, …(?) MWA… few hours near Full Moon, Sept.

32. Ben McKinley, ANU Moon Field - 83 MHz

33. Moon Field - 156 MHz

34. Moon Field - 105 MHz Day 1

35. Moon Field - 105 MHz Day 2

36. 80 100 120 140 160 MHz  T b = T b ( moon ) - T b ( sky )