Transcript Wide Field Astronomy with ASKAP

Wide Field Astronomy with ASKAP
Carole Jackson
ASKAP Project Team
5 November 2009
Wide Field Astronomy with ASKAP
ASKAP specifications
Survey science process & User policy
Survey science
ASKAP - what next
ASKAP - developed & built by CSIRO
Simon Johnston & Ilana Feain
ASKAP Project Scientists
ASKAP - fully funded
Many aligned Australian developments
ASKAP & SKA
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: 10 international teams now working
with the project
ASKAP Specifications
High-dynamic range, wide field-of-view telescope
Number of dishes
Dish diameter
Max baseline
Resolution
Sensitivity
Speed
36
12 m
6 km
(max) 8
< 50 K
1.5x105 m4/K2.deg2
Observing frequency
700 – 1800 MHz
Field of View
30 deg2
Processed Bandwidth
300 MHz
Channels
16k
Focal Plane Phased Array 188 elements (94x dual pol)
ASKAP - Array of phased arrays
Checkerboard: Inexpensive 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)
ASKAP @ Murchison Radio Observatory
ASKAP @ Murchison Radio Observatory
gazetted towns: 0
population: “up to 160”
2012 – Australia’s new landmark
ASKAP – User Policy (2008)
• 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.
• 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.
ASKAP Survey Science Projects
Large (>1500 hrs) science projects with major science outcomes
During the first 5 years of ASKAP science operations,
up to 75% of observing time for these projects
• Selected via an EOI/proposal process
+ competitive peer review
• Membership and leadership of Survey Teams is open
with one CSIRO ATNF affiliated astronomer.
• Projects will work alongside ASKAP early operations
ASKAP Survey Science Projects
• WALLABY (Koribalski/Staveley-Smith) All sky HI survey to z~0.2 0.5M gals)
• EMU (Norris) All sky continuum to 10 uJy rms
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GASKAP (Dickey) Galactic and Magellanic HI and OH
VAST (Murphy/Chatterjee) Transients and variables (>5 sec)
CRAFT (Dodson/Macquart) Fast transients (<5 sec)
FLASH (Sadler) HI absorption to z~1
POSSUM (Gaensler/Landecker/Taylor) Polarization / RM grid
DINGO (Meyer) Deep HI emission survey
• COAST (Stairs) Pulsar timing and searching
• VLBI (Tingay) ASKAP as part of the LBA
ASKAP Survey Science Projects
Rank
type
Freq (MHz)
Θ (“)
δ (deg) range
Tpointing
Ttotal
δυ
(hrs)
(hrs)
(kHz)
nchan
Stokes
(A)
WALLABY
EG HI emission
1130-1430
30
-90 to +30
8
9600
18
16384
I
(A)
EMU
Continuum
1100-1400
10
-90 to +30
~12
15000
1000
256
I
(A-)
FLASH
EG HI absorption
700 - 1000
30
-90 to +10
2
1700
18
16384
I
(A-)
VAST
Transients/Variables
1150 -1450
10
various
0.01-1
4290
(50%)
10000
30
I,Q,U,V
(A-)
GASKAP
Gal/MC HI & OH
1393-1693
30,60,
90,180
Low latitude
& Magellanic
various
6000
1.1*
15384
I,Q,U,V
(A-)
DINGO
EG HI emission
1100-1400
990-1290
30
0 or -33
500-2500
7500
18
16384
I
(A-)
POSSUM
EG polarisation
1200-1500
18
-90 to +30
10
5500
(50%)
1000
300
I,Q,U,V
(A-)
CRAFT
Fast transients
any
any
any
0
0
18-1000
n/a
I,Q,U,V
SP
VLBI
VLBI
1350 - 1700
4 TAB
-90 to +30
~12
1500
baseband
256
I, Q, U, V
SP
COAST
Pulsar Timing &
Pulsar Searching
1150 1450
700 - 1000
20-30 TAB
-90 to +30
~1hr
~1hr
2250
3000
baseband
0.5kHz
I, Q, U, V
I
ASKAP Next Steps
ASKAP Survey Science Projects now in the Design Study phase
• Top ranked proposals are supported by CSIRO
• 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
Includes early data from first 6-antenna ASKAP array (“BETA”)
• Time assignment allocated on successful final Design Review
• Final Design Study Review - Feb 2012
ASKAP Highlights - November 2009
1. 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
4. Digital systems CDR: 20-21 October complete
5. Observatory - on site build late Nov 09 onwards
6. ASKAP survey science projects up-and-running
7. Strategic SKA Collaboration with IBM - SDB
CSIRO Jobs
ICRAR Jobs
ASKAP - please keep in touch!
Keep up-to-date with project news:
ASKAP - www.atnf.csiro.au/projects/askap
Aus-NZ SKA www.ska.gov.au
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!
CSIRO Australia Telescope National Facility
Dr Carole Jackson
Phone: +61 2 9372 4407
Email: [email protected]
Web: www.atnf.csiro.au/projects/askap
Thank you
Contact Us
Phone: 1300 363 400 or +61 3 9545 2176
Email: [email protected] Web: www.csiro.au