Showing posts with label telescope. Show all posts
Showing posts with label telescope. Show all posts

Sunday, 17 January 2010

A trip to Besançon (from a while ago)

Well, it's been ages since I last updated this blog. Things have been very busy here and I haven't had time but now I'm going to try to fill in some of the blanks. Back in October I went off to a conference in Besançon. We drove down from Bonn and it was a nice change to be able to go to a conference without having to get on an aeroplane.

A view of the roofs of Besançon The transit observatory in Besançon

It was a very useful meeting, it brought me up to speed on the projects here and I think a lot of progress was made. I knew almost everyone at the meeting and it was great to catch up with a lot of folks I've not seen since in years. The food was great with lots of good cheese at every meal, not a good place for those who are lactose intolerant!

A view of the roofs of Besançon The transit telescope in Besançon

The town itself is set in the ox-bow of a river and is full of beautiful old buildings. It used to be a centre for the watch industry until the advent of quartz clocks. The conference was held opposite the historic transit telescope used for timekeeping and testing of mechanical chronometers. They organised guided tours of the telescope and the Musée du Temps in town as well as a spectacular conference dinner.

Sunday, 20 September 2009

A trip to Effelsberg

Last week Michael took Paulo and me to see the telescope in Effelsberg. I'd been to Effelsberg before during a conference in Bonn over six years ago but this visit was more interesting because I knew I would be using this telescope a lot over the coming years. Unfortunately, unlike the day six years ago, it was cloudy and rainy.

The Effelsbserg telescope on a sunny day The Effelsberge telescope on a rainy day

We were introduced to the local staff and shown around the main building before going on a tour of the telescopes. I say telescopes because a new LOFAR station has been built next to the 100m. While LOFAR will be an amazing instrument and this station alone has the same collecting area as Parkes, it's not exactly spectacular to look at. It is basically a lot of wire in a field with a big box-o'-electronics next to it. Still, it's going to be fun to use.

The LOFAR station at Effelsberg The primary focus cabin

Then we turned our attention to the 100m itself. It's a beautifully designed telescope which changes its shape in an entirely predictable way as it moves. This means that unlike the GBT it can maintain an accurate high-frequency surface without needing actuators. We took a lift up to the top of the towers. To get to the focus cabin the telescope was pointed nearly horizontally allowing us to walk along one of the support arms. This has the added advantage of not having to climb all the way. From the arm you get a good view of the primary and secondary focus cabins.

The secondary focus cabin The primary focus cabin and secondary reflector

Once inside the primary focus cabin the telescope was slewed so that it was pointing directly up. It was interesting how our perception of the space in the focus cabin changed as the floor slowly became the wall and visa-versa. Once we'd reached the zenith we climbed up to the roof to admire the slightly damp view of the valley.

The view from the top The cable wrap
The view down a cabin support arm The control room

Back on the ground we inspected the cable wrap before heading to the control room. In the rack of backends I saw a familiar sight, a PDFB from the ATNF. It still needs a bit of work before we can use it regularly. There was also the new multibeam backend which vital for the new survey.

The PDFB The multibeam backend

After a quick meeting we drove back to Bonn, stopping for a late lunch and a beer in a nearby village. I'm looking forward to going back to observe!

Tuesday, 21 July 2009

The Parkes open day

I spent my second weekend in a row at Parkes, this time it was the Parkes open day. Given all the visitors, helicopters and media broadcasting the RFI environment was bound to be terrible but George managed to persuade Vik and me that it was worth trying to get some observations for one of our projects.

As we gathered for the briefing on the Saturday morning there were already people queuing to get in. Some had come from Victoria and Queensland. It wasn't long before the line for the telescope tours was stretching around the telescope and was 3 hours long. Despite that everyone seemed to be very cheerful and enjoyed the tours. We were in the control room, one of the last stops on the tour and we became expert in explaining what we were observing in 60 seconds or less! George, Vik and I took turns talking to the relentless tours, doing the observations and checking e-mail.

The queue for the telescope tour A tour walks along the AZ track

There were stands from local groups, science outreach people from further afield, shows in the 3D theatre, walks around the grounds, science talks in the marquee and even a bouncy castle!

I gave a live interview on ABC radio in the morning. I was surprised that it lasted 5 mins or more rather than the usual sound-bite. Later a punter from Dubbo told me that he'd heard this fella on the radio talking about pulsars - fame at last! There was a lot of media interest with all the major TV stations sending at least one crew. The ABC arrived in their helicopter.

By the end of the first day we were all knackered. There was a BBQ and bonfires at the woolshed for the volunteers. We stayed late drinking beer (purely medicinal, to sooth our sore throats), telling tall stories and jokes.

The next day I had a talk to give at the main marquee and it was nearly packed. There were lots of good questions and interest and another visitor had heard my radio interview. It was great to meet so many people who are genuinely interesting in what we do.

Aerial view of the Parkes telescope Aerial view of the Parkes telescope

Later on I took a helicopter ride around the telescope. It was a tiny thing with bubble like windows, you could feel every tweak of the controls and gust of wind. It was great to see the telescope from a different angle. It looked much more steeply curved than it does from the ground. I took a few photos and even some video. It was a great trip and has got me thinking about flying lessons again.



We drove through the night on Sunday to get back to Sydney and I decided that Monday morning just wasn't going to happen. It was a long, exhausting but fun weekend. More than 6,500 people visited and more than 3,000 of those took the tour through the telescope. And we may even get some data out of it!