Radio interferometry lectures – David Wilner, Harvard CfA – Google Hangout

David Wilner is the Associate Director of the Radio & Geoastronomy Division at the Harvard Center for Astrophysics, and an expert in circumstellar disks, the formation of planets, and the development of aperture synthesis techniques.

He’ll be giving us two lectures on consecutive weeks:

Title: Radio Astronomy and Interferometry Fundamentals
Date: 2pm (AEDT) Thursday 19th February
Link: http://anita.edu.au/lectures/radio-astronomy-and-interferometry-fundamentals-david-wilner/

Abstract:
Radio astronomy uses observations at radio wavelengths to study celestial objects. This lecture will provide a brief introduction to radio astronomy, including a description of common emission mechanisms and radio telescopes, and why multiple telescopes are linked as interferometers to make high resolution “aperture synthesis” images (a technique recognized by the 1974 Nobel Prize in Physics). We will use pictures to develop intuition about the Fourier transform relationship between the sky brightness and visibility function that underlies radio interferometry. (A companion lecture will provide a pedagogical introduction to the process by which radio interferometric images are made.)

Title: Imaging and Deconvolution in Radio Interferometry
Date: 2pm (AEDT) Thursday 26th February
Link: http://anita.edu.au/lectures/imaging-and-deconvolution-in-radio-interferometry-david-wilner/

Abstract:
Observations with a typical radio interferometer provide incomplete and noisy samples of the Fourier transform of the sky brightness image that we’d like to analyze. This lecture will provide a pedagogical and practical introduction to the process by which radio interferometric images are made, including visibility weighting and tapering schemes and algorithm-based deconvolution methods to deal with inevitable missing samples. We will conclude with a brief discussion of the Atacama Large Millimeter Array, an new radio interferometer with unprecedented imaging capabilities at millimeter wavelengths.

Head over to the ANITA Lecture page for more information on this and recordings of our past lectures: http://anita.edu.au/lectures/

2015 ANITA workshop and Astroinformatics School

Dear ANITA Members,
The 2015 ANITA Workshop and Astroinformatics School will be hosted by the Research School of Astronomy and Astrophysics, at the ANU. Please see details below.

Regards,
Cathryn, on behalf of the Organising Committee

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2015 ANITA Workshop and Astroinformatics School
The Australian National University
Workshop: Monday February 9th – Tuesday February 10th, 2015
School: Wednesday February 11th – Friday February 13th, 2015
Organising Committee: Geoff Bicknell, Amanda Karakas,
Alexander Heger, Krzysztof Bolejko, Camila Correa
Program and accommodation details to come.
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ANITA Google Hangout: What is gravitational wave astronomy?

Dear ANITA and ASA members.

Next Wednesday 20th August at 1pm (AEST) ANITA will hold its next online lecture:

What is gravitational wave astronomy, and what can it do for me?
Dr. Paul Lasky, University of Melbourne.

All are welcome to join! The target audience will range from undergrad to postdoc, however anyone interested is sure to get something out of it.

For more details (including lecture notes and slides closer to the day) click here.

Thanks, and see you there!
Darren Croton & Chris Power

ANITA Town Hall Meeting

ANITA will hold a Town Hall Meeting during the ASA Annual Scientific Meeting at Macquarie University. The meeting will be held during lunch (1pm-2pm) on Wednesday July 23 in the Price Theatre. Come along and hear about the latest Chapter activities, the announcement of the 2015 ANITA Workshop and Astroinformatics School, and a vote on the ANITA proposal for a Theoretical Astrophysics Institute or a National Fellowship program.

ANITA Google Hangout: A New Window on Inflation: Cosmological Perturbations and Gravitational Waves

Dear ANITA and ASA members.

Next Wednesday 11th June at 1pm (AEST) ANITA will hold its next online lecture: “A New Window on Inflation: Cosmological Perturbations and Gravitational Waves”, by David Parkinson from the University of Queensland.

This lecture will be of particular interest to those who wish to better understand the recent BICEP2 results.

All are welcome to join! The target audience will range from undergrad to postdoc, however anyone interested is sure to get something out of it.

More details (including lecture notes and slides) are available at: http://anita.edu.au/lectures/

Thanks, and see you there!
Darren Croton & Chris Power

ANITA Google Hangout: An astronomers introduction to databases and SQL

Dear ANITA and ASA members.

Next Monday 28th April at 2pm (AEST) ANITA will hold its next online lecture: “An Astronomers Introduction To Databases And SQL”, by Paul Hancock from Curtin University.

All are welcome to join! The target audience will range from undergrad to postdoc, however anyone interested is sure to get something out of it.

More details (including lecture notes and slides) are available at: http://anita.edu.au/lectures/

Thanks, and see you there!
Darren Croton & Chris Power

ANITA Google Hangout March Lecture: “Density Estimation and Clustering”

Dear ANITA members.

We’d like to announce the next in our ongoing Google Hangouts on Air lecture series.

Speaker: Sanjib Sharma, University of Sydney
Title: “Density Estimation and Clustering”
Date: Wednesday 12th March 1pm (AEST)
Where: The internets

Abstract: Estimating density of a given set of points and identifying clusters are two important techniques to reveal hidden information in data. With recent advances in technology, today we have data which is both large (number of objects per data set) and rich (amount of information in each object). This poses a unique challenge for data mining. In multi dimensional spaces, not all the algorithms work equally well. Also, not all algorithms are computationally efficient for analyzing large amounts of data. In this lecture, I will discuss various algorithms and highlight their strengths and weaknesses. I will then concentrate on a few algorithms that work well in multi dimensional spaces and are also fast and efficient to be applied on large data sets. I will also show a few applications of these algorithms to astronomy.

The lecture will be broadcast over Google’s Hangouts on Air. Lecture slides and links will be available closer to the day at http://anita.edu.au/lectures/density-estimation-and-clustering-sanjib-sharma/.

Looking forward to “seeing” you there!
Darren Croton & Chris Power

ANITA Workshop and Summer School 2014

Dear ANITA and ASA members.

We would like to invite you to attend the 8th Workshop of the Australian National Institute for Theoretical Astrophysics (ANITA), to be held on the 17th and 18th of February 2014, followed by the N-body Summer School from the 19th to 21st of February 2014. Both events will be hosted by the Sydney Institute for Astronomy (SIfA) at the University of Sydney.

Please follow the link below to learn more about the Workshop/School and to register:

http://anita.edu.au/workshop2014/

There is no registration fee for either the Workshop or School. This is thanks to the kind contributions from the following sponsors:

  • Astronomical Society of Australia (ASA)
  • Centre of Excellence for All-Sky Astrophysics (CAASTRO)
  • International Centre for Radio Astronomy Research (ICRAR)
  • Australian Astronomical Observatory (AAO)
  • Centre for Astrophysics & Supercomputing (CAS), Swinburne
  • University of Melbourne
  • Macquarie University
  • University of Sydney

We look forward to seeing you in Sydney in 2014.

ANITA Steering Committee: Jarrod Hurley, Darren Croton, Sarah Maddison, Orsola De Marco, Chris Power, Alan Duffy, Cathryn Trott & Camila Correa.

2014 Organising Committee: Geraint Lewis, Krzysztof Bolejko, Orsola De Marco, Chris Power & Weiguang Cui.

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ANITA Google Hangout – Computational Bayes – Wednesday 1pm (AEDT) 16th October 2013

Dear ANITA and ASA members.

Wednesday 16th October 2013 at 1pm (ADST) ANITA will hold its next online lecture, the third in a series of four from Aaron Robotham.

All are welcome to join! The target audience will range from undergrad to postdoc, however anyone interested is sure to get something out of it.

More details (including lecture notes and slides) are available at: http://anita.edu.au/lectures/

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Title: Computational Bayes
Speaker: Aaron Robotham (aaron.robotham@uwa.edu.au)

Abstract: Having established the basic concepts of a Bayesian approach to data analysis, in this lecture we will go further and apply it to more complicated problems that require the use of computers. This will lecture will cover Markov Chain Monte Carlo (MCMC) and more specifically Metropolis Hastings sampling. We will be making use of R in this lecture, and at this stage a basic degree of familiarity is assumed. To get back up to speed the keen student may want to read back through the notes from the “Introduction to R” lecture (also on ANITA).
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ANITA Google Hangout Lecture 3 – Wednesday 1pm (AEDT) 9th October 2013

Dear ANITA and ASA members.

This coming Wednesday at 1pm (AEDT) ANITA will hold its next online lecture. All are welcome to join! The target audience will range from undergrad to postdoc, however anyone interested is sure to get something out of it.

More details (including lecture notes and slides) are available at: http://anita.edu.au/lectures/

We look forward to seeing you there!

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Title: Bayes Theory
Speaker: Aaron Robotham (aaron.robotham AT uwa.edu.au)

Abstract: For those who don’t know, R is a very powerful statistical programming language. This lecture will be the second in a series of four, which together will build a full Bayesian framework with applications to astronomy using R. In this lecture we investigate the basic foundations of Bayes Theory, with emphasis on worked practical examples. The lecture concludes with two famous statistical problems, which the attentive student should be able to tackle with their new Bayesian toolkit.
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