AAO Observer Feb 2014
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OBSERVER THE AUSTRALIAN ASTRONOMICAL OBSERVATORY NEWSLETTER NUMBER 125 FEBRUARY 2014 HERMES Achieves First Light HERMES Commissioning | Gemini Astronomy Contest | Seventy-Five Years of Schmidtery DIRECTOR’S MESSAGE Director’s message Warrick Couch One of the AAO’s key functions, as set out months of this period, I can at least claim spectrograph. So it is most gratifying to in the Australian Astronomical Observatory to have strong connections to its origins, now be at this point where this capability Act 2010, is “to develop, manufacture and in having a lot to do with the securing of is now in place on the AAT, ready for our provide instrumentation for use by the the NCRIS grant that funded a big chunk community to reap the scientific rewards. Australian optical astronomy community”. of HERMES, and then being party to the Of course major instruments do not get to A conspicuous feature of this issue of AAT Board’s decision to give this project a telescope without a long, complex, and the AAO Observer is that over the last the green light. The most prominent often challenging journey – and HERMES semester the AAO has delivered on this in memory I have of these early beginnings has been a ‘crash course’ introduction spades, with the successful commissioning was the overwhelming support received to this world for me as the new AAO of two new instruments on the AAT. from the Australian astronomy community Director! Readers of this issue will also for the investment of a significant fraction By far the most significant of these is appreciate this when they read Keith (~10%) of the NCRIS funds in a major new HERMES, the commissioning of which Shortridge’s article on page 8, which so instrument for the AAT, and the very clear represents the culmination of what has brilliantly captures the ups and downs, consensus that emerged that it should be a been a mammoth effort by the entire highs and lows, moments of despair as fibre-fed multi-object high esolution optical observatory over the last 6 years. Although well as euphoria of the last 7 months of I feel a complete ‘Johnny-come-lately’ HERMES’ journey. To have successfully in being AAO Director for just the last 6 dismantled HERMES at the AAO’s old Contents SCIENCE HIGHLIGHTS OzDES and the Dark Energy Survey 4 HERMES Commissioning - as it happened 8 CYCLOPS2 Catches an Exoplanet in a Polar Orbit 10 KOALA: a new 1000 element integral field unit for the AAT 12 Resolving the role of environment in galaxy evolution with SPIRAL 14 OBSERVATORY NEWS A New Chapter for the Australian Gemini Astronomy Contest 18 StarFest in the Warrumbungles 19 AusGO CORNER 21 Seventy-Five Years of Schmidtery 24 LOCAL NEWS News from North Ryde 26 Letter from Coona 27 Credit: Isobelle Teljega (St Margaret's Anglican School), Travis Rector (U. Alaska Anchorage), and the Australian Gemini Office. The nearby spiral galaxy IC 5332 was captured in the winning image from the 2013 Gemini School Astronomy Contest! DIRECTOR’S MESSAGE Epping site, shipped it to and reassembled use of a ‘double lens’ microlens array that discussions. From an AAO perspective, it at the AAT, overcome the serious issues realizes an almost 100% filling factor and we are well placed to provide a quantitative with the imaging performance of HERMES a much more efficient coupling between assessment of the impact the national four VPH gratings, achieved first light the focal plane and the fibre array. and international optical telescopes that and fully commissioned the instrument the AAO operates/supports (AAT, UKST, With both KOALA and HERMES now over three runs in close succession in Gemini, Magellan) have had over the commissioned, it is worth highlighting October-December, and demonstrated last decade, particularly as a function that the AAT is now a very versatile that HERMES performs close to spec, of instrumental capability. In looking to spectroscopic facility indeed in terms is an effort of heroic proportions, for the next decade, I think it important to of providing multi-object, single fibre which the HERMES team and all the consider the AAO’s place within Australian and IFU capabilities over a broad range AAO staff should be very proud. astronomy from two angles: Firstly, of spectral resolution. The robotically what combinations of optical telescope/ As we head into 2014, the stage is now positioned 400-fibre “two degree field” instrument capabilities, existing or new, set for the major flagship survey to be (2dF) system now feeds either the does the AAO need to provide to allow undertaken with HERMES – the GALactic AAOmega or HERMES spectrographs, the Australian astronomy community to Archaeology with HERMES (GALAH) providing multi-object spectroscopy at achieve its scientific aspirations? Secondly, Survey – to commence, and for HERMES to low-to-moderate (R = 1300 – 10,000) what specific roles does the AAO need be made available as a facility instrument or high (R = 28,000 – 50,000) spectral to have as a national facility if it is to to the community starting in semester resolution, respectively. SAMI and provide the best possible support to its 2014B. Already, GALAH has made a KOALA then provide both multi- (x13) research community and that maximizes promising start through an initial pilot and single-object IFU capability over the its productivity in a decade where the survey. With its primary goal being to same low-to-moderate spectral resolution international astronomy landscape is reconstruct the formation history of the range, through feeding AAOmega. This sure to change significantly? Let the early Milky Way by measuring precise represents a powerful suite of capabilities decadal planning process commence! radial velocities and abundances for over that should keep the AAT scientifically a million stars, it has a strong synergy competitive well into the future, noting with Gaia space mission that will create that further enhancements are planned a precise 3D map of stars throughout soon (e.g. upgrade of the AAOmega CCDs the Milky Way as well as measure their in two months time) or are in the pipeline motions. In what has ended up as quite (e.g. expansion of SAMI to a 50-60x immaculate timing, Gaia was successfully multi-IFU system, known as “Hector”). launched on 19 December (2013) – just Finally, 2014 will be a very important year 4 days after HERMES commissioning for the Australian astronomy community as was completed – and so far is on track it undertakes its decadal planning process to enter full survey mode in May. for the 2016-2025 period. This process As if commissioning HERMES was not a (organized by the National Committee big enough task, the AAO’s new integral for Astronomy) will involve undertaking field unit KOALA was also successfully a stock take of Australian astronomy’s commissioned on the AAT the week prior capabilities, assessing its impact both to the first HERMES commissioning run. nationally and internationally, providing As described in Simon Ellis’ article on page a vision for the future, and determining 12, KOALA is a 1,000 element IFU device priorities and strategies for implementing that provides a bigger field of view and this vision. As such, Australia’s national better throughput than its predecessor, astronomy facilities (AAO and CASS) SPIRAL. Moreover, it further builds on are certain to figure prominently in these the AAO’s heritage of innovation in fibre optic-based instrumentation, with the SCIENCE HIGHLIGHTS OzDES and the Dark Energy Survey Kyler Kuehn1, Chris Lidman1, Filipe B. Abdalla2, Chris D’Andrea3, Manda Banerji2, Elizabeth Buckley-Geer4, Michael Childress5,14, Tamara Davis6, Stephen Fine7, Karl Glazebrook8, Stephanie Jouvel9, Alex Kim10, David Lagattuta8, Huan Lin4, Geraint Lewis7, Paul Martini11, Jeremy Mould8, Bob Nichol3, Ray Norris12, David Parkinson6, Eduardo Rozo13, Eli Rykoff13, Nick Seymour12, Rob Sharp5, Rollin Thomas10, Syed Uddin8,14, William Wester4, Fang Yuan5,14. Ordinary Matter, Dark the Supernova Legacy Survey (SNLS). of the observations. We have therefore Matter and Dark Energy Spectroscopically following all these SNe built a system that allows us to download The atoms that make up the things we Ia in real time is not practical. Instead, the latest target catalogues and create see every day - us, the air we breathe, the DES will forego the real-time follow-up the configuration files a few hours before planet we stand on, the sun that warms of the bulk of the SNe Ia and will use a each night starts. To simplify things as our skin, and the 6000 stars that we can strategy that has been tested in a pilot much as possible, we have developed the see when we look up at the night sky - survey that the OzDES consortium did web-based tool shown in Figure 1. Each play a relatively minor role in how the with the 2dF fibre positioner and the row in this figure represents one of the universe evolves. Dark matter is 10 times AAOmega spectrograph on the AAT. The DES SN fields. The toggles allow the user more significant than this ordinary matter. central plank of the strategy is to obtain to lock fibres on selected targets (used More significant still is dark energy. redshifts from the SN host galaxies, from only when a field is re-observed during which a large sample of photometrically- a run), to produce files that can be read What is dark energy? Is it the classified SNe Ia can be constructed with by commonly used display tools such “cosmological constant” long ago sufficient purity and completeness for the as Aladin, and to switch to the backup described by Albert Einstein, or does cosmological analysis. The results of the program if conditions are too poor for the it indicate that our theory of gravity is OzDES pilot survey are described in an main program.