Search Publications
A low luminosity state in the massive X-ray binary SAX J0635+0533
Mereghetti, S.; La Palombara, N.
The X-ray pulsar SAX J0635+0533 was repeatedly observed with the XMM-Newton satellite in 2003-2004. The precise localization provided by these observations confirms the association of SAX J0635+0533 with a Be star. The source was found, for the first time, in a low-intensity state, a factor ~30 lower than that seen in all previous observations. Th…
On the predictability of unstable satellite motion around elongated celestial bodies
Mysen, E.
Context: Close satellite orbits around small and elongated celestial bodies can experience massive aperiodic changes in shape. According to a number of published works, the changes are continuous functions of the orbit elements of the satellite's unperturbed trajectory.
Aims: Later research, however, has revealed that the onset of instability …
Results from DROXO. I. The variability of fluorescent Fe 6.4 keV emission in the young star Elias 29. High-energy electrons in the star's accretion tubes?
Micela, G.; Favata, F.; Giardino, G. +3 more
Polycyclic aromatic hydrocarbon selected galaxies
Siebenmorgen, R.; Haas, M.; Chini, R. +3 more
Context: This is the fourth in a series of papers based on the ISOCAM Parallel Survey at 6.7 µm. While the first three papers have been devoted to active galactic nuclei (AGN), here we report on emission-line galaxies without AGN signatures in their optical spectra.
Aims: Polycyclic aromatic hydrocarbon (PAH) emission has been found in b…
Hard X-ray flux from low-mass stars in the Cygnus OB2 association
Micela, G.; Drake, J. J.; Flaccomio, E. +1 more
Context: The Cygnus OB2 association, the central engine of the Cygnus X star-forming region, is the subject of an extensive INTEGRAL Key Project that will accumulate 6Ms of observations. Analysis of 2Ms of observations by De Becker and co-workers provides the most sensitive limit yet obtained on hard X-ray emission from the cluster.
Aims: We i…
A decade of X-ray astronomy with XMM-Newton. Commentary on: Jansen F., Lumb D., Altieri B., et al., 2001, A&A, 365, L1; Strüder L., Briel U., Dennerl K., et al., 2001, A&A, 365, L18; Turner M. J. L., Abbey A., Arnaud M., et al., 2001, A&A, 365, L27
Güdel, M.
INTEGRAL and Swift/XRT observations of IGR J16460+0849
Zhang, S.; Chen, Y. P.; Li, T. P. +2 more
Aims: IGR J16460+0849 is reported in the 3rd IBIS catalog with the shortest exposure of about 11 ks among all the detected sources, which makes it the most interesting target to be investigated with a deeper exposure. The currently available data have increased to an exposure time of a few hundred ks. This stimulates us to investigate the source a…
INTEGRAL and Swift/XRT observations of IGR J19405-3016
Torres, D. F.; Zhang, S.; Chen, Y. P. +3 more
Aims: IGR J19405-3016 is reported in the 3rd IBIS catalog as one of its lowest significance sources (~4.6σ under an exposure of about 371 ks). This leads to a caveat in multi-wavelength studies, although the source was identified in the optical as a Seyfert 1. The currently available INTEGRAL data on the source have increased to an exposure time o…