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Planck early results. V. The Low Frequency Instrument data processing
Baccigalupi, C.; Banday, A. J.; Barreiro, R. B. +146 more
We describe the processing of data from the Low Frequency Instrument (LFI) used in production of the Planck Early Release Compact Source Catalogue (ERCSC). In particular, we discuss the steps involved in reducing the data from telemetry packets to cleaned, calibrated, time-ordered data (TOD) and frequency maps. Data are continuously calibrated usi…
Black hole accretion and host galaxies of obscured quasars in XMM-COSMOS
Kneib, J. -P.; Aussel, H.; Le Floc'h, E. +61 more
Aims: We explore the connection between black hole growth at the center of obscured quasars selected from the XMM-COSMOS survey and the physical properties of their host galaxies. We study a bolometric regime ( ⟨ Lbol ⟩ = 8 × 1045 erg s-1) where several theoretical models invoke major galaxy mergers as the mai…
GOODS-Herschel: evidence of a UV extinction bump in galaxies at z > 1
Magnelli, B.; Altieri, B.; Aussel, H. +16 more
Context. Dust attenuation curves in external galaxies are useful for studying their dust properties as well as interpreting their intrinsic spectral energy distributions. These functions are not very well known in the UV range whether at low or high redshift. In particular, the presence or absence of a UV bump at 2175 Å remains an open issue that …
An asteroseismic study of the O9V star HD 46202 from CoRoT space-based photometry
Auvergne, M.; Baudin, F.; Michel, E. +13 more
The O9V star HD 46202, which is a member of the young open cluster NGC 2244, was observed by the CoRoT satellite in October/November 2008 during a short run of 34 days. From the very high-precision light curve, we clearly detect β Cep-like pulsation frequencies with amplitudes of ~0.1 mmag and below. A comparison with stellar models was performed …
The deep XMM-Newton Survey of M 31
Stiele, H.; Pietsch, W.; Haberl, F. +5 more
Aims: The largest Local Group spiral galaxy,
Multi-wavelength observations of Proxima Centauri
Liefke, C.; Schmitt, J. H. M. M.; Reiners, A. +5 more
Aims: We report simultaneous observations of the nearby flare star Proxima Centauri with VLT/UVES and XMM-Newton over three nights in March 2009. Our optical and X-ray observations cover the star's quiescent state, as well as its flaring activity and allow us to probe the stellar atmospheric conditions from the photosphere into the chromosphe…
Planck early results. XXVI. Detection with Planck and confirmation by XMM-Newton of PLCK G266.6-27.3, an exceptionally X-ray luminous and massive galaxy cluster at z ~ 1
Böhringer, H.; Kneissl, R.; Dahle, H. +189 more
We present first results on PLCKG266.6-27.3, a galaxy cluster candidate detected at a signal-to-noise ratio of 5 in the Planck All Sky survey. An XMM-Newton validation observation has allowed us to confirm that the candidate isa bona fide galaxy cluster. With these X-ray data we measure an accurate redshift, z = 0.94 ± 0.02, and estimate the clust…
Multiwavelength campaign on Mrk 509. III. The 600 ks RGS spectrum: unravelling the inner region of an AGN
Kaastra, J. S.; Kriss, G. A.; Arav, N. +14 more
We present the results of our 600 ks RGS observation as part of the multiwavelength campaign on Mrk 509. The very high quality of the spectrum allows us to investigate the ionized outflow with an unprecedented accuracy due to the long exposure and the use of the RGS multipointing mode. We detect multiple absorption lines from the interstellar medi…
Pulse-amplitude-resolved spectroscopy of bright accreting pulsars: indication of two accretion regimes
Klochkov, D.; Santangelo, A.; Ferrigno, C. +2 more
Context. In addition to coherent pulsation, many accreting neutron stars exhibit flaring activity and strong aperiodic variability on time scales comparable to or shorter than their pulsation period. This behavior shows that the accretion flow in the vicinity of the accretor must be highly non-stationary. Observational study of this phenomenon is …
Discovery of a massive X-ray luminous galaxy cluster at z = 1.579
Böhringer, H.; Rosati, P.; Nonino, M. +11 more
We report on the discovery of a very distant galaxy cluster serendipitously detected in the archive of the XMM-Newton mission, within the scope of the XMM-Newton Distant Cluster Project (XDCP). XMMUJ0044.0-2033 was detected at a high significance level (5σ) as a compact, but significantly extended source in the X-ray data, with a soft-band flux f(…