Search Publications

Physical parameters of the plasma tail of Rosetta target comet 67P/Churyumov-Gerasimenko

Churyumov, K. I.

On the basis of photometric processing of the two large scale photographic images of comet 67P obtained in Nizhny Arkhyz with the help of the 6-BTA reflector of SAO of RAS and using the diffusion model of L. Shulman and H. Nazarchuk some physical parameters of magnetic field of the comet plasma tail (coefficients of diffusion and induction of magn…

Low cost development for the Rosetta Lander French subsystems: Lessons learned

Debus, Andre; Moura, Denis

After the delay of the Rosetta mission launch, previously planned in January 2003, this mission, led by ESA, will finally be launched from Kourou by Ariane V G+ at the beginning of next year (2004). After a long trip, the spacecraft will reach the comet Churyumov Gerasimenko in 2014. The mission includes a lander, built by an European consortium u…

Corrigendum: Titan Radar Mapper observations from Cassini's T₃ fly-by

Stiles, B.; Kelleher, K.; Callahan, P. +32 more

Using XMM-Newton and Optical Photometry to Figure Out CVs

Szkody, P.; Henden, A.; Homer, L.

X-ray light curves from XMM-Newton combined with optical data from the satellite and ground-based observers provide distinctive shapes and periodicities that give information on the correct classification of cataclysmic variables. Our recent data on three SDSS sources with strong helium emission are used to identify a highly magnetic system (a pol…

Automated spectral and timing analysis of AGNs

Guainazzi, M.; Karas, V.; Munz, F.

% We have developed an autonomous script that helps the user to automate the XMM-Newton data analysis for the purposes of extensive statistical investigations. We test this approach by examining X-ray spectra of bright AGNs pre-selected from the public database. The event lists extracted in this process were studied further by constructing their e…

High-Energy Astrophysics and the Virtual Observatory

Padovani, Paolo

The Virtual Observatory (VO) will revolutionise the way we do Astronomy by allowing easy access to all astronomical data and by making the handling and analysis of datasets at various locations across the globe much simpler and faster. I report here on the need for the VO and its status in Europe, concentrating on the recently started EURO-VO proj…

²⁶Al spectroscopy with SPI: The challenge to detect Galactic rotation

Strong, A. W.; Hartmann, D. H.; Diehl, R. +1 more

The shape of the γ-ray line from radioactive ²⁶Al, at 1808.7 keV energy in the frame of the decaying isotope, is determined by its kinematics when it decays, typically 10 ⁶ yr after its ejection into the interstellar medium from its nucleosynthesis source. Three prior measurements of the line width exist: HEAO-C's 1982 value …

Structure, temporal variations and radiative flux in Saturn's clouds

Pérez-Hoyos, S.

This Ph.D. Thesis was presented on 16 December 2005 and awarded with the highest honours at the University of the Basque Country, Spain. This work was advised by professor Agustín Sánchez-Lavega.

Adaptive-randomised self-calibration of electro-mechanical shutters for space imaging

Debei, Stefano; De Cecco, Mariolino; Zaccariotto, Mirco +1 more

This work describes the self-calibration of a high-precision open-loop mechanism. The self-calibration method is applied to a mechanical shutter for space applications, which was launched onboard the ESA-ROSETTA mission (launch: 2 March 2004). It is based on an adaptive 'model reference' and a 'randomised' search method which may be generalised to…

The Spatial Distribution of W UMa-Type Stars

Ogloza, Waldemar; Zakrzewski, Bartlomiej

The aim of this project is to study the spatial distribution of contact binaries and to compare the sample from the project of study the W UMa-type stars, with existing databases such as Hipparcos, GCVS or ASAS (ESA, 1997; GCVS, 2005; Pojmanski, 2002).