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The 6-GHz multibeam maser survey - I . Techniques


Green, JA and Caswell, JL and Fuller, GA and Avison, A and Breen, SL and Brooks, K and Burton, MG and Chrysostomou, A and Cox, J and Diamond, PJ and Ellingsen, SP and Gray, MD and Hoare, MG and Masheder, MRW and McClure-Griffiths, NM and Pestalozzi, M and Phillips, C and Quinn, L and Thompson, MA and Voronkov, MA and Walsh, A and Ward-Thompson, D and Wong-McSweeney, D and Yates, JA and Cohen, RJ, The 6-GHz multibeam maser survey - I . Techniques, Monthly Notices of the Royal Astronomical Society, 392, (2) pp. 783-794. ISSN 0035-8711 (2009) [Refereed Article]

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DOI: doi:10.1111/j.1365-2966.2008.14091.x


A new seven-beam 6–7 GHz receiver has been built to survey the Galaxy and the Magellanic Clouds for newly forming high-mass stars that are pinpointed by strong methanol maser emission at 6668 MHz. The receiver was jointly constructed by Jodrell Bank Observatory (JBO) and the Australia Telescope National Facility (ATNF) and allows simultaneous coverage at 6668 and 6035 MHz. It was successfully commissioned at Parkes in 2006 January and is now being used to conduct the Parkes–Jodrell multibeam maser survey of the Milky Way. This will be the first systematic survey of the entire Galactic plane for masers of not only 6668-MHz methanol, but also 6035-MHz excited-state hydroxyl. The survey is two orders of magnitude faster than most previous systematic surveys and has an rms noise level of ∼0.17 Jy. This paper describes the observational strategy, techniques and reduction procedures of the Galactic and Magellanic Cloud surveys, together with deeper, pointed, follow-up observations and complementary observations with other instruments. It also includes an estimate of the survey detection efficiency. The 111 d of observations with the Parkes telescope have so far yielded >800 methanol sources, of which ∼350 are new discoveries. The whole project will provide the first comprehensive Galaxy-wide catalogue of 6668-MHz and 6035-MHz masers

Item Details

Item Type:Refereed Article
Keywords:masers, surveys, stars: formation, Magellanic Clouds
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Breen, SL (Dr Shari Breen)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:57600
Year Published:2009
Web of Science® Times Cited:130
Deposited By:Physics
Deposited On:2009-07-28
Last Modified:2012-11-29

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