HARP/ACSIS: a submillimetre spectral imaging system on the James Clerk Maxwell Telescope
By J. Buckle, R. Hills, Henry Smith, W. R. F. Dent, Graham S. Bell, E. Curtis, Roger Dace, Hugh Gibson, S. Graves, J. Leech and 28 more. 2009
206 citations recorded by the source corpus.
This paper describes a new Heterodyne Array Receiver Programme (HARP) and AutoCorrelation Spectral Imaging System (ACSIS) that have recently been installed and commissioned on the James Clerk Maxwell Telescope (JCMT). The 16-element focal-plane array receiver, operating in the submillimetre from 325 to 375 GHz, offers high (three-dimensional) mapping speeds, along with significant improvements over single-detector counterparts in calibration and image quality. Receiver temperatures are 120 K across the whole band and system temperatures of 300K are reached routinely under good weather conditions. The system includes a single-sideband filter so these are SSB figures. Used in conjunction with ACSIS, the system can produce large-scale maps rapidly, in one or more frequency settings, at high spatial and spectral resolution. Fully-sampled maps of size 1 square degree can be observed in under 1 hour. The scientific need for array receivers arises from the requirement for programmes to study samples of objects of statistically significant size, in large-scale unbiased surveys of galactic and extra-galactic regions. Along with morphological information, the new spectral imaging system can be used to study the physical and chemical properties of regions of interest. Its three-dimensional imaging capabilities are critical for research into turbulence and dynamics. In addition, HARP/ACSIS will provide highly complementary science programmes to wide-field continuum studies, and produce the essential preparatory work for submillimetre interferometers such as the SMA and ALMA.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/0d90c727f013cd4d7d38188f8c0d0d616200894d
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In Astronomy and Astrophysics
- N. Evans II
- J. Glenn
- Erik Rosolowsky
- P. Harvey
- Jonathan P. Williams
- J. Bally
- C. Battersby
- Mark R. Krumholz
In Instrumentation
- N. Evans II
- J. Bally
- Jonathan P. Williams
- Erik Rosolowsky
- J. Glenn
- C. Battersby
- Mark R. Krumholz
- A. Leroy
Citations in the corpus
- THE BOLOCAM GALACTIC PLANE SURVEY: SURVEY DESCRIPTION AND DATA REDUCTION (2010, background): “Instruments are beginning to be developed to address this limitation, such as NRAO’s K-band Focal Plane Array11 and JCMT’s HARP-B (Buckle et al. 2009).”
- Scuba-2: On-sky calibration using submillimetre standard sources (2013, methodology): “Skydips taken with the 345 GHz HARP instrument (Buckle et al. 2009) on the JCMT, as well as previous comparisons between SCUBA skydips and the CSO tipper show that the atmosphere deviates from a plane-parallel approximation about 30 per cent of the time, particularly in the early evening when the…”