Search Publications
Coronal transients and metric type II radio bursts. I. Effects of geometry
Raymond, J. C.; Mancuso, S.
In this paper we investigate the relationship between type II and coronal transient activity in terms of emission originating from the top or the flanks of a bow/piston shock surface, extending just above the coronal mass ejection (CME) leading edge surface. For this purpose, we used ground-based metric type II radio burst observations of twenty-n…
Mapping the inner regions of MCG-6-30-15 with XMM-Newton
Cappi, M.; Ponti, G.; Dadina, M. +1 more
Timing analysis of a ∼95 ks long XMM-Newton observation of the Seyfert 1 galaxy MCG-6-30-15 is presented. Model-independent tools have been used with the intent of resolving the different components that produce the observed flux and spectral variations down to timescales as short as ∼300 s. We find that the fractional variability is possibly due …
XMM-Newton observation of Kepler's supernova remnant
Ballet, J.; Decourchelle, A.; Hughes, J. P. +4 more
We present the first results coming from the observation of Kepler's supernova remnant obtained with the EPIC instruments on board the XMM-Newton satellite. We focus on the images and radial profiles of the emission lines (Si K, Fe L, Fe K) and of the high energy continuum. Chiefly, the Fe L and Si K emission-line images are generally consistent w…
ISAAC/VLT observations of a lensed galaxy at z = 10.0
Kneib, J. -P.; Schaerer, D.; Pelló, R. +2 more
We report the first likely spectroscopic confirmation of a z∼ 10.0 galaxy from our ongoing search for distant galaxies with ISAAC/VLT. Galaxy candidates at z ⪆ 7 are selected from ultra-deep JHKs images in the core of gravitational lensing clusters for which deep optical imaging is also available, including HST data. The object reported here, foun…
XMM-Newton and VLT observations of the isolated neutron star 1E 1207.4-5209
Caraveo, P. A.; Bignami, G. F.; Mereghetti, S. +3 more
In August 2002, XMM-Newton devoted two full orbits to the observation of 1E 1207.4-5209, making this isolated neutron star the most deeply scrutinized galactic target of the mission. Thanks to the high throughput of the EPIC instrument, ∼360 000 photons were collected from the source, allowing a very sensitive study of the temporal and spectral be…
The young stellar population in the Serpens Cloud Core: An ISOCAM survey
Prusti, T.; Perault, M.; Olofsson, G. +18 more
We present results from an ISOCAM survey in the two broad band filters LW2 (5-8.5 µm) and LW3 (12-18 µm) of a 0.13 square degree coverage of the Serpens Main Cloud Core. A total of 392 sources were detected in the 6.7 µm band and 139 in the 14.3 µm band to a limiting sensitivity of ∼2 mJy. We identified 53 Young Stellar Obj…
Series of high-frequency slowly drifting structures mapping the flare magnetic field reconnection
Karlický, M.
Rare series of the slowly drifting structures observed during two solar flares (April 11, 2001 and March 18, 2003) in the 0.8-4.5 GHz frequency range are studied. Their time-frequency evolution is compared with topological and X-ray characteristics of the flares. Based on recent modelling of the magnetic field reconnection in the bursting and inte…
The XMM-Newton HBS28 sample: Studying the obscuration in hard X-ray selected AGNs
Page, M. J.; Wolter, A.; Barcons, X. +9 more
This paper presents the analysis of a statistically complete sample of 28 serendipitous X-ray sources selected in 82 pointed XMM-Newton fields down to a count-rate of 0.002 counts s-1 (4.5-7.5 keV energy band). This is the first sample selected in this energy range to have complete spectroscopic identifications and redshift determinatio…
X-ray observations of Be/X-ray binaries in the SMC
Pietsch, W.; Haberl, F.
Fifteen Be/X-ray binaries and candidates in the SMC were observed serendipitously with the EPIC instruments of XMM-Newton during two observations of SNR 0047-73.5 and SNR 0103-72.6 in October 2000. A total of twelve of those sources are detected. For eleven of them an accurate position and in part detection of X-ray pulsations support the proposed…
Predicted rotation signatures in MHD disc winds and comparison to DG Tau observations.
Dougados, C.; Ferreira, J.; Cabrit, S. +4 more
Motivated by the first detections of rotation signatures in the DG Tau jet (Bacciotti et al. \cite{bacciotti2002}), we examine possible biases affecting the relation between detected rotation signatures and true azimuthal velocity for self-similar MHD disc winds, taking into account projection, convolution as well as excitation gradients effects. …