50th anniversary of the Mount John University Observatory

The Mount John University Observatory celebrates its 50th anniversary this year. To mark the occasion, a symposium was held 6 – 8 May, at Tekapo, at the foot of the mountain.

Many speakers — myself included — gave talks about the part MJUO played in their lives. I spent six months of 1999 observing for the Microlensing Observations in Astrophysics (MOA) collaboration. It was an experience that I’ll never forget. One of the other speakers commented that visiting Tekapo was good for the soul. I couldn’t agree more. The place is spectacular.

John Hearnshaw, past director of the MJUO and former head of the Department of Physics and Astronomy at the University of Canterbury, was the driver behind the symposium. When he kindly accepted my offer of a talk, he told me to spend more time on reminiscences than science. It was that kind of conference.

I met Audrey Walsh, the daughter of Frank Bateson, the astronomer charged with deciding where to place an observatory for the University of Canterbury.

Bateson was instrumental in the founding of the Mount John University Observatory near Lake Tekapo, assisting the University of Canterbury in finding an appropriate location for the observatory.[3] Bateson was appointed astronomer-in-charge of the observatory after it opened in 1963; he held this position until his retirement in 1969. –– Wikipedia entry

Audrey recalled that her father was a man of focus and drive — and was never seen in public not wearing a suit.

Gerry Gilmore, New Zealand astronomer, cosmologist and professor at the Institute of Astronomy in Cambridge, is also the UK lead for ESA’s space satellite GAIA. I had the pleasure of introducing Gerry at a talk he gave to the Auckland Astronomical Society last week. More on GAIA in a later post. Gerry spoke at the symposium about his time on Mount John and his thoughts for the Observatory’s future. To those of us concerned with engaging politicians on the topic of supporting New Zealand astronomy, the need or otherwise of a National Observatory, or indeed the potential loss of capacity in instrumentation and observation skills, Gerry notes that we need to learn how to speak the language of the politicians.

On the general topic of Wither Mount John, I chatted with Karen Pollard, the present Directory of the Observatory. I also spoke with Graeme Murray, general manager of Earth & Sky — the operation that conducts public tours up the mountain.

Participants at the 50th Anniversary of the Mount John University Observatory.   The altitude positions appear to be sinusoidal.

Participants at the 50th Anniversary of the Mount John University Observatory. The altitude positions appear to be sinusoidal. Source: http://www.phys.canterbury.ac.nz/newsletter/2015/2015-05-15.pdf

It was also great to see Duncan Hall. Duncan inhabited an office across the corridor from mine during my time at Manchester University. His was the fearsome job of figuring out how to set up the Square Kilometer Array project. At the symposium, Duncan spoke of his past work in instrumentation for Mount John.

The first session of the final day was MOA-centric. Phil Yock spoke of the origin of the MOA collaboration, followed by Yasushi Muraki, who recounted the construction of the 1.8m telescope. I followed up with a few memories about my time up on the mountain. Fumio Abe brought the science of planetary microlensing to the fore, describing the background and our recent results.

There were many other talks, all engaging and interesting — too many to summarise here. The last activity of the symposium was a trip up the mountain. This was the first time in 16 years that I was there. I had expected changes, and there were plenty. Not so many however, that I felt the place unfamiliar. It reminded me instantly that this was a home I inhabited for a short, but forever memorable time.

Watching SkyWatch

Just had a very interesting chat with some of the folk at http://skywatch.co/. They are interested in collecting information about astronomical transient data and making that information available real-time to anyone who wants it, in a standardised format.

They started off with the GCN, the network that disseminates information about gamma-ray bursts from space satellites, to ground based observatories. But they are looking to expand:

skywatch

But GCN is just one of many networks. So we continued to build…

And they are talking to astronomers about their data, what they collect, and how SkyWatch can help.

PhD update

An important part of provisional year of PhD candidacy is to refine one’s research question.

While I wrote an evolutionary algorithm code as an optimization method to search the high dimensional parameter space of the microlensing modelling problem, I have been faced with the tough decision to place it on the sideburner while diving into a new area of investigation for the purpose of refining the research question further.

This was due to the literature findings that suggest that microlensing model comparison techniques are in need of development, beyond the comparison of chi-square values alone!

This new direction of investigation involves Nested-sampling based algorithms for simultaneous parameter estimation and model comparison, based on the Bayesian approach.

19th Annual Microlensing Conference

Annapolis is a pretty city, and played host to this year’s annual microlensing conference. Our host was Dr Rich Barry, Goddard Space Flight Centre.

There were a lot of interesting talks, planet discoveries and techniques being a primary focus, but with a strong influence coming from the proposed space telescope missions which may include microlensing observations in their additional science programmes.

There are two space telescope missions are ESA’s Euclid and NASA’s WFIRST/AFTA. Both are exciting missions. I contributed in a small way to the proposal to use Euclid for planetary microlensing. The last piece of work I did at Manchester was to write code to simulate microlensing observations, to estimate how many planets a space telescope could find, and of what type. I never finished that code, but it was taken over by Matthew Penny at Manchester as part of his PhD work, and he turned it into an excellent piece of software. Matt wrote an excellent paper on it.

It was great to catch up with Matt, and lots of other microlensers at the conference. Ashna Shara (my PhD student) was also there, to get to know the field, meet the people, and try to refine the topic of her PhD.

I gave a talk on — not microlensing — but on a piece of work that uses the large databases that the microlensing survey teams have accumulated. Next conference I hope to have something more on planetary microlensing!

linux.conf.au

This year’s linux.conf.au meeting was held in Auckland, at the University of Auckland’s Business school.

There was an astronomy miniconference held during the main meeting. JJ Eldridge and Pauline Harris (Victoria) gave awesome talks, as did my PhD students Ashna Sharan and Alex Li and MSc student Martin Donachie. I was in the happy position of being able to introduce these able students and the work they are doing with me, leaving me to pontificate about other things.

All the talks were recorded, and edited for your viewing pleasure. They are available at http://mirror.slingshot.co.nz/pub/linux.conf.au/2015/Case_Room_2/Tuesday/.

It was a great event, and a great crowd. I didn’t expect to be talking to a packed room! All credit to Jessica Smith for organising the miniconference!

19th International Conference on Microlensing

microAnnapolis

The next international conference on microlensing will be held at NASA, Goddard Space Flight Centre in Annapolis!

There’ll be a long list of fascinating topics discussed. Here is a truncated list, filtered by my particular interests:

  • Microlensing with Big data
  • New discoveries in microlensing
  • Data challenges – microlensing for the unwashed masses
  • Planetary system formation history
  • What could be derived directly from ground and space-based microlensing data sets – as is
  • Space-borne ulensing missions
  • WFIRST
  • Euclid
  • Ground-based microlensing in the era of WFIRST and Euclid
  • Unbound planets
  • Black holes, white dwarfs and other non-exoplanet lenses

http://asd.gsfc.nasa.gov/conferences/microlensing19/index.html

Jobs for Astrophysicists

It’s not often that you see a software engineering house calling specifically for PhDs in astrophysics:

We have a brand new, very exciting opportunity for two Mathematicians or Physicists to join my client who is a Software Engineering House based in Cambridge to work within the role of Software Engineer.

All of the software within this team is built on maths – therefore you can expect on a daily basis that you will be working on many interesting problems and challenges – this is just one of the reasons why this company believes that they retain their staff for an average of 10 years! This involves working on a variety of mathematical areas ranging from 3D geometry, vectors, numerical methods and algorithm design.

We would be delighted to hear from anyone who has successfully finished their First Degree, Masters or even better a PhD in Mathematics, Physics and Astrophysics or any closely related subjects. No commercial working experience is required, just a real desire to use all aspects of your education on a day to day basis, and genuinely interested in exploring a route into Software Engineering / Development.

http://www.totaljobs.com/JobSearch/JobDetails.aspx?JobId=60604663