HerMES: SPIRE Science Demonstration Phase Maps
Abstract
We describe the production and verification of sky maps of the five SPIRE fields observed as part of the Herschel Multi-tiered Extragalactic Survey (HerMES) during the Science Demonstration Phase (SDP) of the Herschel mission. We have implemented an iterative map-making algorithm (SHIM; The SPIRE-HerMES Iterative Mapper) to produce high fidelity maps that preserve extended diffuse emission on the sky while exploiting the repeated observations of the same region of the sky with many detectors in multiple scan directions to minimize residual instrument noise. We specify here the SHIM algorithm and outline the various tests that were performed to determine and characterize the quality of the maps and verify that the astrometry, point source flux and power on all relevant angular scales meets the needs of the HerMES science goals. These include multiple jackknife tests, determination of the map transfer function and detailed examination of the power spectra of both sky and jackknife maps. The map transfer function is approximately unity on scales from one arcminute to one degree. Final maps (v1.0), including multiple jackknives, as well as the SHIM pipeline, have been used by the HerMES team for the production of SDP papers.
Keywords
Cite
@article{arxiv.1010.0020,
title = {HerMES: SPIRE Science Demonstration Phase Maps},
author = {L. Levenson and G. Marsden and M. Zemcov and A. Amblard and A. Blain and J. Bock and E. Chapin and A. Conley and A. Cooray and C. D. Dowell and T. P. Ellsworth-Bowers and A. Franceschini and J. Glenn and M. Griffin and M. Halpern and H. T. Nguyen and S. J. Oliver and M. J. Page and A. Papageorgiou and I. Perez-Fournon and M. Pohlen and N. Rangwala and M. Rowan-Robinson and B. Schulz and Douglas Scott and P. Serra and D. L. Shupe and E. Valiante and J. D. Vieira and L. Vigroux and D. Wiebe and G. Wright and C. K. Xu},
journal= {arXiv preprint arXiv:1010.0020},
year = {2015}
}
Comments
9 pages, 9 figure, MNRAS Accepted, 27 Sept, 2010