Search Publications
Planck intermediate results. XLVII. Planck constraints on reionization history
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +165 more
We investigate constraints on cosmic reionization extracted from the Planck cosmic microwave background (CMB) data. We combine the Planck CMB anisotropy data in temperature with the low-multipole polarization data to fit ΛCDM models with various parameterizations of the reionization history. We obtain a Thomson optical depth τ = 0.058 ± 0.012 for …
Planck 2015 results. XVI. Isotropy and statistics of the CMB
Kim, J.; Miville-Deschênes, M. -A.; Boulanger, F. +242 more
We test the statistical isotropy and Gaussianity of the cosmic microwave background (CMB) anisotropies using observations made by the Planck satellite. Our results are based mainly on the full Planck mission for temperature, but also include some polarization measurements. In particular, we consider the CMB anisotropy maps derived from the multi-f…
Planck intermediate results. XXX. The angular power spectrum of polarized dust emission at intermediate and high Galactic latitudes
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +231 more
The polarized thermal emission from diffuse Galactic dust is the main foreground present in measurements of the polarization of the cosmic microwave background (CMB) at frequencies above 100 GHz. In this paper we exploit the uniqueness of the Planck HFI polarization data from 100 to 353 GHz to measure the polarized dust angular power spectra C
Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +170 more
This paper describes the identification, modelling, and removal of previously unexplained systematic effects in the polarization data of the Planck High Frequency Instrument (HFI) on large angular scales, including new mapmaking and calibration procedures, new and more complete end-to-end simulations, and a set of robust internal consistency check…
Second ROSAT all-sky survey (2RXS) source catalogue
Haberl, F.; Nandra, K.; Freyberg, M. J. +3 more
Aims: We present the second ROSAT all-sky survey source catalogue, hereafter referred to as the 2RXS catalogue. This is the second publicly released ROSAT catalogue of point-like sources obtained from the ROSAT all-sky survey (RASS) observations performed with the position-sensitive proportional counter (PSPC) between June 1990 and August 199…
Planck 2015 results. XIX. Constraints on primordial magnetic fields
Kim, J.; Miville-Deschênes, M. -A.; Bernard, J. -P. +230 more
We compute and investigate four types of imprint of a stochastic background of primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) anisotropies: the impact of PMFs on the CMB temperature and polarization spectra, which is related to their contribution to cosmological perturbations; the effect on CMB polarization induced by F…
Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +199 more
We have constructed all-sky Compton parameters maps, y-maps, of the thermal Sunyaev-Zeldovich (tSZ) effect by applying specifically tailored component separation algorithms to the 30 to 857 GHz frequency channel maps from the Planck satellite. These reconstructed y-maps are delivered as part of the Planck 2015 release. The y-maps are characterized…
Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +195 more
Within ten nearby (d < 450 pc) Gould belt molecular clouds we evaluate statistically the relative orientation between the magnetic field projected on the plane of sky, inferred from the polarized thermal emission of Galactic dust observed by Planck at 353 GHz, and the gas column density structures, quantified by the gradient of the column densi…
The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue
Esquej, P.; Motch, C.; Ballet, J. +37 more
Context. Thanks to the large collecting area (3 ×~1500 cm2 at 1.5 keV) and wide field of view (30' across in full field mode) of the X-ray cameras on board the European Space Agency X-ray observatory XMM-Newton, each individual pointing can result in the detection of up to several hundred X-ray sources, most of which are newly discovere…
Optimal binning of X-ray spectra and response matrix design
Kaastra, J. S.; Bleeker, J. A. M.
Aims: A theoretical framework is developed to estimate the optimal binning of X-ray spectra.
Methods: We derived expressions for the optimal bin size for model spectra as well as for observed data using different levels of sophistication.
Results: It is shown that by taking into account both the number of photons in a given spectral…