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Millimetre Astronomy with the Australia Telescope

Millimetre Astronomy with the Australia Telescope. Max Voronkov Software Scientist – ASKAP 12 th June 2009. Australia Telescope at mm: ATCA and Mopra. Good set of receivers: 12mm, 7mm and 3mm Mopra up to 117 GHz Broadband backends available! Application for time via

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Millimetre Astronomy with the Australia Telescope

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  1. Millimetre Astronomy with the Australia Telescope Max Voronkov Software Scientist – ASKAP 12th June 2009

  2. Australia Telescope at mm: ATCA and Mopra • Good set of receivers: 12mm, 7mm and 3mm • Mopra up to 117 GHz • Broadband backends available! • Application for time via • http://opal.atnf.csiro.au • Proposal deadlines • June 15 (summer time) • December 15 (mm)

  3. CABB - Present mm capabilities More channels (16384) over each 2 GHz sub-band are technically feasible, but the timescale of implementation is uncertain at present

  4. CABB - Zoom modes (example: 1 MHz zoom)

  5. CABB - Zoom modes • The width of a filter bank channel is the width of each zoom window • Coarse resolution of the wide sub-band = bandwidth of 1 zoom window • Stitching is possible (seamless, if interleaved windows are used) • Initially up to 4 zoom windows per each 2 GHz sub-band • Eventually up to 16 zooms per sub-band will be available • Each 2 GHz sub-band (and all its zooms) can have different resolution

  6. NH3 (4,4) in G351.77-0.54 (pre-CABB) • Work by Beuther, Walsh and Longmore • Zero-order (contours) and first-order (colour scale) moment maps • Clear indication of rotation, but no signs of flattening • Rotating surrounding envelope, rather than a disc • The major axis is roughly 10000 AU

  7. Search for CH3CH2OCH3 (ethyl methyl ether) Sgr B2-M Sgr B2-N • 7mm pre-CABB work by Jones, Cunningham et al. • Lines detected, but no correct brightness pattern with other transitions has been found. So identification may be incorrect.

  8. Masers in G343.12-0.06 (MNRAS, 2006, 373, 411) • Work by Voronkov, Brooks, Sobolev, Ellingsen, Ostrovskii, Caswell

  9. CABB observations of NGC6334I at 3mm Work by Brooks, Titmarsh, Voronkov, Urquhart done as part of the CABB science commissioning 3mm continuum (contours) and C34S (2-1) (grayscale)

  10. Recombination lines in G19.61-0.23 at 7mm H53 42951.47 MHz CABB without zooms

  11. Mopra - a complementary single dish • Similar set of receivers (but can go up to 117 GHz) • Wide-band spectrometer (UNSW-MOPS) available • (for a few years by now) • Available modes: • Broad-band mode continuous coverage of 8.3 GHz (0.25 MHz resolution = 0.8 km/s at 3mm) • Zoom mode • 16 windows, 137.5 MHz each (0.03 MHz resolution = 0.1 km/s at 3mm) or See Tui Britton’s poster on BHR71 for a science example

  12. Summary ATCA and Mopra are very powerful Southern hemisphere instruments thanks to the new broadband capabilities CABB: two 2 GHz sub-bands within 8 GHz, optional zoom modes MOPS: either 8 GHz broad band or 16 zooms, 137.5 MHz each Tuning ranges are 16-27 GHz, 30-50 GHz and 83.5-106 GHz (76-117 GHz for Mopra) A number of large surveys are already under way or planned There is a potential for collaboration, contact the relevant PI if you’re interested. Mopra HOPS, all Galactic plane at 12mm (Andrew Walsh) Mopra MALT-90 at 3mm (Jim Jackson) Mopra MALT-7mm (Gary Fuller), ATCA-7mm (Andrew Walsh) ATCA follow-up of the MMB survey detections at 7mm (myself) Proposal deadline is only a few days away (June 15)! This deadline is for the next Oz summer, but night time is usually fine for 12mm and 7mm observations.

  13. Contact Us Phone: 1300 363 400 or +61 3 9545 2176 Email: enquiries@csiro.au Web: www.csiro.au Thank you Australia Telescope National Facility Max Voronkov Software Scientist (ASKAP) Phone: 02 9372 4427 Email: maxim.voronkov@csiro.au Web: http://www.narrabri.atnf.csiro.au/~vor010 Thanks to the following people for their contribution to the content of this presentation: P.Edwards, K.Brooks, S.Longmore, P.Jones, A.Walsh, M.Cunningham, T.Britton, S.Ellingsen, J.Caswell, A.Titmarsh, D.Ferris, D.McConnell, W.Wilson, J.Chapman

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