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The ASKAP Early Science Program
Updated Plan v1.1 ­ for community discussion
Dr. Lisa Harvey-
Smith | ASKAP Project ScienEst October 2015
ASTRONOMY & SPACE SCIENCE


This workshop is an opportunity to discuss and provide feedback on the ASKAP Early Science Program plan v1.1, released September 2015.. ...and to present early science plans.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


What is ASKAP Early Science?
· ASKAP Early Science is an observing program aimed at producing scientifically useful data. · It will begin when ASKAP-12 has been commissioned and scientifically verified. · Early science observations happens in parallel with the deployment of phased array feeds on further ASKAP antennas.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


Early Science PrioriEes
· Demonstrate the unique capabilities of ASKAP · Provide data sets to the astronomy community to facilitate the development of analysis and interpretation techniques · Provide a mechanism for feedback to CASS on the performance and characteristics of the system and opportunities for improvement · Achieve high scientific impact Although early science is a high priority, the installation of the remaining phased array feeds and commissioning of ASKAP will remain the overarching goal.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


The Early Science Program
· A wide area continuum survey (1 MHz and 18.5 kHz resolution, full Stokes, 700-1800 MHz, 6-12 hours per field) · A few 30 square degree fields studied in neutral hydrogen (18.5 kHz resolution, 1150-1450 MHz, 120 hours integration time per field (TBC). · A single deep HI field (18.5 kHz resolution, 1000-1300 MHz) · A science program at high spectral resolution (details TBC ­ see GASKAP talk) Other ideas requiring very small observing times (e.g. MWA EoR field) may be observed on an "opportunistic" basis as part of commissioning.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


EsEmated Eme available for early science
Program duration: 12-14 months 9400 hours Fraction for early science 25% 2300 hours Minus ~20% overheads (beamforming, calibration etc.) Total available on sky 1800 hours*

*These are estimated figures and may change

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


How we might divide the available Eme
For discussion: · · · · C H D H ontinuum ~800 hours I fields ~800 hours eep HI field ~100 hours igh spectral resolution ~100 hours

Noting that: Large continuum and HI surveys are a priority for ASKAP and these surveys will serve several scientific purposes Advanced observing modes (zoom & fast transient) may follow a different timeline In some cases commissioning data may also provide scientific benefit

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


Pilot ObservaEons
Pilot observations will enable CASS and science teams to test and verify end-to-end performance before embarking on large observing programs. 1) Pilot observations with ASKAP-6 To verify the ASKAP data pipeline and provide test data for science teams to develop post-processing techniques 2) Pilot observations with ASKAP-12 An initial observation in each early science observing mode with ASKAP-12 to verify the pipelines using this array The satisfactory completion of (2) will be the trigger to begin the early science observing program.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


What Next?
· Lisa is preparing a proposal for the Magnus supercomputer at the Pawsey Centre to facilitate ASKAP early science post-processing (deadline 16th October) · This workshop: discuss the ASKAP early science program v1.1, including estimated observing times, pilot program and role of science teams · Monthly ASKAP early science forum meetings: detailed planning for pilot observations · Science team splinter meetings: discuss science goals, target fields, writing and testing post-processing pipelines, communicate with project scientist (invite me). · Commissioning/integration/software development ­ lots of work to do ­ see Adam/ Ian/Matt's talks.

The Australian Square Kilometre Array Pathfinder | Lisa Harvey-
Smith


Thank you
CSIRO Astronomy & Space Science Dr. Lisa Harvey-
Smith Research Astronomer | ASKAP Project ScienGst e lisa.harvey-
smith@csiro.au w www.atnf.csiro.au w www.lisaharveysmith.com
CSIRO ASTRONOMY AND SPACE SCIENCE