2024-03-19T02:11:10Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/457562018-06-25T07:07:10Zcom_10261_37com_10261_4col_10261_290
A multifrequency method based on the matched multifilter for the detection of point sources in CMB maps
Lanz, L. F.
Herranz, D.
Sanz, J. L.
González-Nuevo, J.
López-Caniego, M.
Methods: data analysis
Techniques: image processing
Surveys
Cosmic microwave background
Radio continuum: galaxies
11 páginas, 6 figuras, 1 tabla.-- El Pdf del artículo es la versión pre-print: arXiv:0907.0603v1.-- Trabajo presentado al "Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA)" celebrado en Madrid del 13 al 17 de septiembre de 2010.
In this work, we deal with the problem of simultaneous multifrequency detection of extragalactic point sources in maps of the Cosmic Microwave Background. We developed a linear filtering technique that takes into account the spatial and the cross-power spectrum information at the same time. By using realistic simulations, we compared this technique with the monofrequency matched filter in terms of completeness, reliability, flux and spectral index accuracy. The multifrequency method outperforms the matched filter in all the studied cases in this work.
The authors acknowledge partial financial support from the Spanish
Ministry of Education (MEC) under project ESP2004-07067-
C03-01 and the joint CNR-CSIC research projects 2006-IT-0037
and 2008IT0059. LFL acknowledges the Spanish CSIC for a JAEPredoc
fellowship. Partial financial
support for this research has been provided to JLS by the Spanish
MEC and to JG-N by the Italian ASI (contracts Planck LFI Activity
of Phase E2 and I/016/07/0 COFIS) and MUR. JG-N also acknowledges
a researcher position grant at the SISSA (Trieste). MLC
acknowledges a post-doctoral fellowship from EGEE-III (FP7
INFSO-RI 222667).
Peer reviewed
2012-02-16T13:12:27Z
2012-02-16T13:12:27Z
2010-04
artículo
http://purl.org/coar/resource_type/c_6501
Monthly Notices of the Royal Astronomical Society 403(4): 2120-2130 (2010)
0035-8711
http://hdl.handle.net/10261/45756
10.1111/j.1365-2966.2010.16260.x
1365-2966
en
http://dx.doi.org/10.1111/j.1365-2966.2010.16260.x
open
Wiley-Blackwell
Royal Astronomical Society