Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
HerMES: SPIRE Science Demonstration Phase maps
Article first published online: 26 OCT 2010
© 2010 The Authors. Journal compilation © 2010 RAS
Monthly Notices of the Royal Astronomical Society
Volume 409, Issue 1, pages 83–91, November 2010
How to Cite
Levenson, L., Marsden, G., Zemcov, M., Amblard, A., Blain, A., Bock, J., Chapin, E., Conley, A., Cooray, A., Dowell, C. D., Ellsworth-Bowers, T. P., Franceschini, A., Glenn, J., Griffin, M., Halpern, M., Nguyen, H. T., Oliver, S. J., Page, M. J., Papageorgiou, A., Pérez-Fournon, I., Pohlen, M., Rangwala, N., Rowan-Robinson, M., Schulz, B., Scott, D., Serra, P., Shupe, D. L., Valiante, E., Vieira, J. D., Vigroux, L., Wiebe, D., Wright, G. and Xu, C. K. (2010), HerMES: SPIRE Science Demonstration Phase maps. Monthly Notices of the Royal Astronomical Society, 409: 83–91. doi: 10.1111/j.1365-2966.2010.17771.x
- Issue published online: 9 NOV 2010
- Article first published online: 26 OCT 2010
- Accepted 2010 September 24. Received 2010 September 24; in original form 2010 September 13
- cosmology: observations;
- diffuse radiation;
- infrared: general;
- submillimetre: general
We describe the production and verification of sky maps of the five Spectral and Photometric Imaging Receiver (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 [The SPIRE-HerMES Iterative Mapper (SHIM)] 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 meet 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 1 arcmin to 1°. 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.