Determining the optimum scan map strategy for Herschel-SPIRE using the SPIRE photometer simulator

Details Determining the optimum scan map strategy for Herschel-SPIRE using the SPIRE photometer simulator Determining the optimum scan map strategy for Herschel-SPIRE using the SPIRE photometer simulator

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.381.1583w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 381, Issue 4, pp. 1583-1590.

Astronomy and Astrophysics

Astronomy

6

Instrumentation: Photometers, Methods: Observational, Submillimetre

Scientific paper

The forthcoming Herschel space mission will provide an unprecedented view of the far-infrared/submillimetre Universe, with the SPIRE instrument covering the 200-670 μm wavelength range. To obtain the best quality of astronomical data from such an expensive mission the observing modes must be optimized as far as possible. This paper presents the possible scanning strategies that can be utilized by the SPIRE photometer, within the limitations imposed by the Herschel spacecraft. Each strategy is investigated for effectiveness by performing simulated observations, using the SPIRE photometer simulator. By quantifying the data quality using a simple metric, we have been able to select the optimum scanning strategy for SPIRE when it begins taking science data within the next couple of years.
Additionally, this work has led to the development of a specific SPIRE mapmaking algorithm, based on the CMB code MADmap, to be provided as part of the SPIRE data pipeline processing suite. This will allow every SPIRE user to take full advantage of the optimized scan map strategy, which requires the use of maximum likelihood mapmakers such as MADmap.

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