E-ELT goes to Chile

As expected, ESO Council have accepted the recommendation to build the European Extremely Large Telescope at Cerro Armazones in the Chilean Andes. The decision was announced yesterday with the customary nice words and some cool accompanying imagery, video and a dedicated ESOCast episode, which you can all see here.

Particularly noteworthy is the nod of thanks ESO give to Spain, who were competing with Chile for the chance to to host the telescope. While many European astronomers, especially the Britons who’ve traditionally had the largest foreign presence on the island, have a great big soft spot for La Palma, I think a collective sigh of relief went through the community on hearing the news. La Palma is undoubtedly an excellent observing site, but it’s just not of the same quality as Paranal or Armazones – it’s more humid, has fewer clear nights and is plagued by Saharan sand in its atmosphere.

With this announcement, all three of the ELT-type telescopes  – E-ELT, GMT and TMT – now have a home. Now all they need is money to start building!

Image: ESO/S. Brunier

Making my software open

After thinking  about software development in astronomy and talking about it with friends at work and on this blog, I thought it was about time I put my money where my mouth is. I too write software – in fact, the bulk of my work here in Leiden has been based around code I’ve written over the past 2 years for the METIS project (in IDL). The code basically calculates the sensitivity of METIS on the E-ELT, or the minimum flux it will be able to detect at a particular signal to noise (S/N) in a given exposure time over its wavelength range,  in various modes of observation. You can find the full package with background info on my brand-new github page, and a paper is in preparation (to be presented at SPIE 2010) for your referencing pleasure.

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With a little help from our friends: Finding a home for E-ELT

Cerro Paranal (middle right) and Cerro Armazones (middle left)

ResearchBlogging.orgESO announced today that their Council have recommended Cerro Armazones in the Chilean Andes as the preferred site for their next generation optical/IR observatory, the 42-m European Extremely Large Telescope. The decision came in response to the delivery of a technical report by the organisation’s E-ELT Site Selection Advisory Committee, from which Armazones emerged as the frontrunner, “because it has the best balance of sky quality across all aspects and it can be operated in an integrated fashion with the existing ESO Paranal Observatory”.

So does this means the deal is done? Apparently not. The text also tells us that ESO have received proposals to host the telescope from both Spain, who would like to see the telescope site on La Palma, and Chile, so a final run-off between these two countries now seems likely.

What has struck me about this whole site selection exercise is the different approaches taken by ESO for the E-ELT and their North American counterparts, the Thirty Meter Telescope project.

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First steps in direct exoplanet spectroscopy

Top: Image of star HR8799 and its exoplanet HR8799c (ESO/M.Janson). Bottom: The spectrum as recorded by the NACO detector, prior to extraction ; the vertical direction is spatial, horizontal is spectral (M. Janson et al, 2010)

ResearchBlogging.org

Astronomers collaborating from both sides of the Atlantic have obtained the first direct spectrum of an exoplanet. The news here is mainly that they managed to record the spectrum and separate it reliably from that of the host star. Their short letter in ApJ, posted to astro-ph yesterday, doesn’t delve deeply into the implications of what they found but focuses more on the way they obtained, processed and analysed their data to separate the planet’s signature from that of the star.

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Future facilities: Coming quite close now actually

This week saw several major developments in my work on instrumentation for astronomy, and as I got lots of Twitter response, I thought I would talk a bit more about them here.

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