Wide Field Astronomy with ASKAP. Wide Field Astronomy with ASKAP. ASKAP Specifications ASKAP & SKA

Transcription

1 Wide Field Astronomy with ASKAP ASKAP specifications Survey science process & User policy Survey science ASKAP - what next Wide Field Astronomy with ASKAP Carole Jackson ASKAP Project Team 5 November 2009 ASKAP - developed & built by CSRO Simon Johnston & lana Feain ASKAP Project Scientists ASKAP - fully funded M aligned Australian developments ASKAP & SKA ASKAP Specifications ASKAP = Australia s Pathfinder contribution to the SKA ASKAP - an SKA Pathfinder to Demonstrate wide FoV, high dynamic-range imaging on a worldclass array telescope (PAFs) Demonstrate Australia s candidate SKA site, the Murchison Radio Observatory (MRO). ASKAP s role as a radio telescope; World s fastest survey radio telescope at cm frequencies Science surveys have been set: international teams now working with the project High-dynamic range, wide field-of-view telescope Number of dishes 36 Dish diameter 12 m Max baseline 6 km Resolution (max) 8 Sensitivity < 50 K Speed 1.5x 5 m /K 2. deg 2 Observing frequency MHz Field of View deg 2 Processed Bandwidth 0 MHz Channels 16k Focal Plane Phased Array 8 elements (9x dual pol) 1

2 ASKAP - Array of phased arrays Murchison Radio Observatory Checkerboard: nexpensive PAF architecture Similar to AA s but use dish to manage FOV, control sidelobes-> high DR across wide FOV PAF Design for SKA: Suzy Jackson (Thurs) Murchison Radio Observatory 2012 Australia s new landmark gazetted towns: 0 population: up to 160 2

3 ASKAP User Policy (2008) Large (>1500 hrs) science projects with major science outcomes ASKAP telescope time will be assigned to astronomical research projects subject only to scientific merit, and technical and operational feasibility. ASKAP data and data products will be released publicly through the ASKAP Science Archive on a timescale designed to maximise scientific utilization and impact. No proprietary period. During the first 5 years of ASKAP science operations, up to 75% of observing time for these projects Selected via an EO/proposal process + competitive peer review The ASKAP Science Archive will be available to astronomers from all over the world. There will be 3 classes of observing time allocated on ASKAP; Survey Science Projects, Guest Science Projects and Target of Opportunity over-rides. Membership and leadership of Survey Teams is open with one CSRO ATNF affiliated astronomer. Projects will work alongside ASKAP early operations WALLABY (Koribalski/Staveley-Smith) All sky H survey to z~ M gals) EMU (Norris) All sky continuum to ujy rms Rank (A) WALLABY (A) EMU Continuum 10-0 FLASH EG H absorption to + VAST Transients/Variabl es various GASKAP Gal/MC H & OH ,60, 90,0 Low latitude & Magellanic DNGO EG H emission or -33 POSSUM EG polarisation GASKAP (Dickey) Galactic and Magellanic H and OH VAST (Murphy/Chatterjee) Transients and variables (>5 sec) CRAFT (Dodson/Macquart) Fast transients (<5 sec) FLASH (Sadler) H absorption to z~1 POSSUM (Gaensler/Landecker/Taylor) Polarization / RM grid DNGO (Meyer) Deep H emission survey COAST (Stairs) Pulsar timing and searching VLB (Tingay) ASKAP as part of the LBA type EG H emission Freq (MHz) 11-1 Θ ( ) δ (deg) range Tpointing Ttotal δυ (hrs) (hrs) (khz) nchan Stokes ~ (50%) 000,Q,U,V various * 1538,Q,U,V (50%) 00 0,Q,U,V CRAFT Fast transients n/a,q,u,v SP VLB VLB TAB ~ baseband 256, Q, U, V SP COAST Pulsar Timing & Pulsar Searching TAB ~1hr ~1hr baseband 0.5kHz, Q, U, V 3

4 ASKAP Next Steps ASKAP Highlights - November 2009 now in the Design Study phase Top ranked proposals are supported by CSRO Design Study Nov 2009 early 2012 Kick-off meeting for SSPs - Oct 2009 Regular ongoing meetings/discussions SSP Design Studies to be reviewed by committee ncludes early data from first 6-antenna ASKAP array ( BETA ) Time assignment allocated on successful final Design Review Final Design Study Review - Feb Full-size ASKAP integration model at Marsfield (Sydney). Complete end-to-end system 2. Phased array feed testing at Parkes testbed (Patriot 12m antenna) - going well 3. Antenna 1 built, factory-accepted in China, En route to MRO (Dec 2009) - build Dec/Jan. Digital systems CDR: October complete 5. Observatory - on site build late Nov 09 onwards 6. ASKAP survey science projects up-and-running 7. Strategic SKA Collaboration with BM - SDB CSRO Jobs

5 CRAR Jobs ASKAP - please keep in touch! Keep up-to-date with project news: ASKAP - Aus-NZ SKA Quarterly anzska Newsletters (general updates) Bi-yearly Science newsletters (see me for one now!) Keep an eye out for the Super Science Fellowships - more jobs! CSRO Australia Telescope National Facility Dr Carole Jackson Phone: Carole.Jackson@csiro.au Web: Thank you Contact Us Phone: or Enquiries@csiro.au Web: 5