Scuba-2: Iterative map-making with the sub-millimetre user reduction facility
By E. Chapin, D. Berry, A. Gibb, T. Jenness, D. Scott, R. Tilanus, F. Economou, W. Holland. 2013
248 citations recorded by the source corpus.
The Submillimetre Common User Bolometer Array 2 (SCUBA-2) is an instrument operating on the 15-m James Clerk Maxwell Telescope, nominally consisting of 5120 bolometers in each of two simultaneous imaging bands centred over 450 and 850 um. The camera is operated by scanning across the sky and recording data at a rate of 200 Hz. As the largest of a new generation of multiplexed kilopixel bolometer cameras operating in the (sub)millimetre, SCUBA-2 data analysis represents a significant challenge. We describe the production of maps using the Sub-Millimetre User Reduction Facility (SMURF) in which we have adopted a fast, iterative approach to map-making that enables data reduction on single, modern, high-end desktop computers, with execution times that are typically shorter than the observing times. SMURF is used in an automated setting, both at the telescope for real-time feedback to observers, as well as for the production of science products for the JCMT Science Archive at the Canadian Astronomy Data Centre. Three detailed case studies are used to: (i) explore convergence properties of the map-maker using simple prior constraints (Uranus -- a point source); (ii) achieve the white-noise limit for faint point-source studies (extragalactic blank-field survey of the Lockman Hole); and (iii) demonstrate that our strategy is capable of recovering angular scales comparable to the size of the array footprint (approximately 5 arcmin) for bright extended sources (star-forming region M17).
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/856864880b8156f5ad3925864072dfe1b93980c5
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In Astronomy and Astrophysics
Citations in the corpus
- Characterization of Scuba-2 450 μm and 850 μm selected galaxies in the COSMOS field (2013, methodology): “Partial maps were constructed using the makemap routine (Chapin et al. 2013) in Smurf with the c© 0000 RAS, MNRAS 000, 000–000 default deep extragalactic configuration file optimising background subtraction.”
- Scuba-2: On-sky calibration using submillimetre standard sources (2013, methodology): “These parameters are discussed in detail in Section 4.1 of Chapin et al. (2013).”