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Jcmt Newsletter JCMT EWSLETTER N J A M E S C L E R K M A X W E L L T E L E S C O P E AUTUMN 2009 • #31 Galactic Centre HARP 12CO(3–2) mapping SCUBA Polarimeter Legacy Science Results RxWD Science Results JCMT Newsletter, James Clerk Max- In This Issue well Telescope, is published biannu- ally and is edited by Antonio Chry- sostomou and Jonathan Kemp. ISSN 1351–5497. Copyright © 2009 by Science and Technology Facilities Council, Joint Astronomy Centre, Hilo, except where copyright re- tained by named individual article or From the Desk of the Director (Davis & Chrysostomou) ............................................. 3 image authors. SSUE postal address I James Clerk Maxwell Telescope JCMT Science Joint Astronomy Centre HIS University Park T The SCUBA Polarimeter Legacy Catalog (Matthews) ............................................ 6 660 North A`ohoku Place N I Hilo, Hawai`i 96720–2700 The 3–D Structure of Molecular Gas Around PWN G 63.7+1.1 USA (Kothes, Matthews, Safi–Harb, & Brunt) ............................................................................................. 8 telephone CO(6–5) Emission from Arp 220: Piecing Together the Puzzle +1 (808) 961 – 3756 of This Enigmatic ULIRG (Papadopoulos, Isaak, van der Werf, & Xilouris) ........................ 10 facsimile +1 (808) 961 – 6516 JCMT Operations world wide web JCMT Science Archive (JSA) Update (Economou) ...................................................... 4 http://www.jach.hawaii.edu/JCMT/ Starlink Software Release: Nanahope Release (Cavanagh) ............................. 5 The Joint Astronomy Centre provides Tips for Reducing ACSIS Data with the ORAC–DR Pipeline: QA Tweaks services and support to enable visit- and Recipe Modifications (Cavanagh, Tilanus, Jenness, & Chrysostomou) ...................... 12 ing and staff astronomers to under- 2 take top-quality, front-line interna- Mapping the Galactic Centre with HARP (Dempsey & Thomas) ............................ 15 tional-class research using the James Galileo Block Party (Heyer) .................................................................................................. 18 Clerk Maxwell Telescope (JCMT) and the United Kingdom Infrared Tele- Mark Horita: 1958–2009 (Davis) ................................................................................. 19 scope (UKIRT); to develop these fa- cilities in order to maintain their position as the most advanced of their kind in the world; to operate them in the most cost effective and efficient manner on behalf of the funding agencies; and to be respon- sive to the changing needs of the contributing organizations. The JCMT is supported by the United Kingdom’s Science and Technology Facilities Council (STFC), the Na- tional Research Council Canada (NRC), and the Netherlands Organi- 2009 • #31 zation for Scientific Research (NWO); it is overseen by the JCMT Board. UTUMN The JCMT is a member of the RadioNet consortium. • A On the front and rear covers: Integrated intensity HARP 12CO(3–2) map of the Galactic Centre. (Also see Figure 1 EWSLETTER and article on page 15.) JCMT N JCMT JCMT N JCMT From the Desk of the Director EWSLETTER Professor Gary Davis (Director JCMT) & Antonio Chrysostomou (Associate Director JCMT) • A The most signifi- though the initial integration work scope until cant event at the over the course of that summer 2012, the future JAC in the period turned up some unexpected prob- beyond that date UTUMN since the last lems, solutions to all of them have is by no means newsletter was since been identified and put in certain. Each of the untimely place. The first two science-grade the three coun- 2009 • #31 death of a long- arrays were delivered in July and tries has its own serving staff installed in August, and as we write unique story to member, Mark this column, the instrument check- tell, but from the Horita; see the out phase is in progress. We have observatory’s dedicated article implemented a fast-track approach point of view it is Gary Davis, Director JCMT elsewhere in this in which the functionality of the in- abundantly clear Antonio Chrysostomou, newsletter. strument will be verified and the that getting sci- Associate Director JCMT instrument will be commissioned ence results out Most readers of this column will over the course of September of SCUBA–2 as quickly as possible is know that the JCMT is in the midst through November, leading to a absolutely essential. This is, in fact, of a profound transformation, in phase of shared-risk observing in the rationale for the fast-track ap- which virtually the entire instrument December and January. By the time proach described above. suite is being replaced or upgraded. you read this column, the call for The science driver for this extreme shared-risk proposals might already In the meantime the JCMT Legacy makeover is the need to capitalise have been issued. Survey with HARP continues. Since on the JCMT’s trail-blazing successes the last edition of the Newsletter we of the past by carrying out large- The delays in this programme have have seen the Nearby Galaxies Leg- area surveys of the submillimetre led to a number of potentially seri- acy Survey reach almost 90% com- sky in both continuum and spectro- ous difficulties. One is the lack of a pletion, the Gould Belt Survey 60%, 3 scopic modes. continuum instrument on the JCMT and the Spectral Legacy Survey are since SCUBA was retired in July 2005 now more than half-way through The spectroscopic part of this trans- (apart from a 3-month visit by AzTEC their project. As always you can formation is virtually complete. later that same year). Fortunately, in keep up with the general progress of HARP, the world’s first array receiver part because there is no realistic the JLS at http://www.jach.hawaii.edu/ in the 345-GHz band, is now our competition for SCUBA–2’s promised JCMT/surveys/JLS_status.html . workhorse instrument, and the up- capabilities, this has not been a seri- graded RxWD provides world-leading ous problem and we have detected We have also seen the JCMT Science sensitivity in the 690-GHz band. no loss of enthusiasm in our user Archive (JSA) and the ORAC–DR pipe- RxA3 continues to provide reliable community for SCUBA–2 and the line advance. Reduced data products service in the 230-GHz band, and projects in the JCMT Legacy Survey; have been available from the JSA for ACSIS now serves as the backend on the contrary, we are asked anx- a while now. After each night’s ob- D ESK spectrometer for all of these. These iously about progress with SCUBA–2 serving, all data used to be reproc- new capabilities have proved to be a everywhere we go! A second diffi- essed on machines at the JAC and OF great success, with HARP in particu- culty is the increase in the cost of the reduced products shipped over lar being used for three projects in the instrument with every delay, and to CADC for ingestion into the JSA. THE the JCMT Legacy Survey. The only it is entirely possible that further This September, an important mile- remaining element of the spectro- cuts to observatory operations will stone was reached when this nightly D scopic instrumentation is ROVER, the be necessary in order to help pay for re-reduction processing was trans- IRECTOR polarimeter for RxA3 and HARP, it. ferred over to the fast machines at which is being commissioned as and CADC. As well as the dramatic in- when time permits amongst our The mention of money brings us to crease in processing power, this other priorities. the third and most profound diffi- gives us increased flexibility as to culty occasioned by the delay in when and how often we can process The continuum part of this transfor- SCUBA–2. The funding agencies in (or reprocess) data and fulfils one of mation is unfortunately running well the UK, Canada and the Netherlands the requirements of the project. We behind schedule, due primarily to are all operating under very con- now intend to go through the back- the late delivery of SCUBA–2 and its strained financing at present, and log of data to bring the archive up to arrays. The instrument itself was although they have all committed to date. delivered in March 2008, and al- the continued operation of the tele- (Director’s Desk, continued on page 4) JCMT Science Archive (JSA) Update Frossie Economou (JAC Software Group) More than 10,000 processed files are now available for ACSIS data from the JCMT Science Archive. These data were reduced by our pipeline in “full on” mode (as op- posed to the shove-data-out-the- door-as-quickly-as-possibly mode that most visiting observers see run- PERATIONS ning at the Mauna Kea summit). Our ORAC–DR recipes have matured considerably since we embarked on JCMT O JCMT this, so the more recent your data, the better it will look. When re- sources allow, we'll go back and re- reduce the backlog to improve early reductions and process data from before the pipeline was available. PIs who would like products from older ACSIS data generated with the latest version of the pipeline can jump the reprocessing queue by emailing jcmtarch .at. jach.hawaii.edu with their project ID(s). 4 (JCMT Science Archive, continued on page 5) Figure 1. — An example of thumbnails from data search results at the JCMT Science Archive (JSA). (Director’s Desk, continued from page 3) Campbell, and her husband Ian, Services Centre in Swindon, UK, has These reduced data products are Electronics Engineer, left at the end joined us as Christine’s replacement, processed by the ORAC–DR pipeline of August to return to their native bringing to an end a happy phase in using advanced methods that also Scotland. Christine and Ian were im- which we had no Manchester United incorporate pre-defined quality as- mensely valuable to us, both in their supporters on staff.
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