Search Publications
The relative and absolute timing accuracy of the EPIC-pn camera on XMM-Newton, from X-ray pulsations of the Crab and other pulsars
Guainazzi, M.; Freyberg, M. J.; Wellbrock, A. +13 more
Aims: Reliable timing calibration is essential for the accurate comparison of XMM-Newton light curves with those from other observatories, to ultimately use them to derive precise physical quantities. The XMM-Newton timing calibration is based on pulsar analysis. However, because pulsars show both timing noise and glitches, it is essential to…
Rest-frame stacking of 2XMM catalog sources. Properties of the Fe Kα line
Nandra, K.; Merloni, A.; Comastri, A. +3 more
Aims: The aim of this work is to characterize the average Fe K emission properties of active galactic nuclei (AGNs) in the source rest-frame.
Methods: We selected a sample of 248 AGNs from the 2XMM catalog, covering a wide redshift range 0 < z < 5 and with the EPIC-PN net 2-10 keV rest-frame counts ≥ 200 and power law photon indice…
Planetary transit candidates in the CoRoT-SRc01 field
Mazeh, T.; Aigrain, S.; Alapini, A. +52 more
Context. The space mission CoRoT is devoted to the analysis of stellar variability and the photometric detection of extrasolar planets.
Aims: We present the list of planetary transit candidates detected in the first short run observed by CoRoT that targeted SRc01, towards the Galactic center in the direction of Aquila, which lasted from April…
Chromospheric jets around the edges of sunspots
Morton, R. J.
Aims: Evidence is beginning to be put forward that demonstrates the role of the chromosphere in supplying energy and mass to the corona. We aim to assess the role of chromospheric jets in active region dynamics.
Methods: Using a combination of the Hinode/SOT Ca II H and TRACE 1550 Å and 1600 Å filters we examine chromospheric jets situat…
Galaxy counterparts of intervening high-z sub-DLAs/DLAs and Mg ii absorbers towards gamma-ray bursts
Vreeswijk, P. M.; Milvang-Jensen, B.; Fynbo, J. P. U. +19 more
We present the first search for galaxy counterparts of intervening high-z (2 < z < 3.6) sub-damped Lyα absorbers (sub-DLAs) and DLAs towards gamma-ray bursts (GRBs). Our final sample comprises five intervening sub-DLAs and DLAs in four GRB fields. To identify candidate galaxy counterparts of the absorbers we used deep optical- and near-infra…
Shape reconstruction of irregular bodies with multiple complementary data sources
Kaasalainen, M.; Viikinkoski, M.
We discuss inversion methods for shape reconstruction with complementary data sources. The current main sources are photometry, adaptive optics or other images, occultation timings, and interferometry, and the procedure can readily be extended to include range-Doppler radar and thermal infrared data as well. We introduce the octantoid, a generally…
Study of the first productive active region in solar cycle 24
Zhang, J.; Li, L. P.; Li, T. +2 more
Context. The Sun is very quiet with less sunspots and activity since the beginning of solar cycle 24. However, the active region (AR) 11 045 emerged on February 5, 2010, is associated with 43 (8 M- and 35 C-class) flares, 53 coronal mass ejections (CMEs), 29 filament eruptions, 19 extreme ultraviolet (EUV) waves and abundant jets, indicating that …
A relativistic iron emission line from the neutron star low-mass X-ray binary GX 3+1
Santangelo, A.; Kaaret, P.; Egron, E. +7 more
We present the results of a spectroscopic study of the Fe Kα emission of the persistent neutron-star atoll low-mass X-ray binary and type I X-ray burster GX 3+1 with the EPIC-PN on board XMM-Newton. The source shows a flux modulation over several years and we observed it during its fainter phase, which corresponds to an X-ray luminosity of LX…
Estimating distance, pressure, and dust opacity using submillimeter observations of self-gravitating filaments
Martin, P. G.; Fischera, J.
We present a detailed study of the surface brightness profiles of dense filaments in
Astrometric confirmation of young low-mass binaries and multiple systems in the Chamaeleon star-forming regions
Neuhäuser, R.; Schmidt, T. O. B.; Mugrauer, M. +4 more
Context. The star-forming regions in Chamaeleon (Cha) are one of the nearest (distance ~ 165 pc) and youngest (age ~ 2 Myr) conglomerates of recently formed stars and the ideal target for population studies of star formation.
Aims: We investigate a total of 16 Cha targets that have been suggested, but not confirmed, to be binaries or multiple…