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Time-dependent tomographic reconstruction of the solar corona
Lamy, P.; Vibert, D.; Peillon, C. +2 more
Solar rotational tomography (SRT) applied to white-light coronal images observed at multiple aspect angles has been the preferred approach for determining the three-dimensional (3D) electron density structure of the solar corona. However, it is seriously hampered by the restrictive assumption that the corona is time-invariant which introduces sign…
MATISSE: A novel tool to access, visualize and analyse data from planetary exploration missions
Antonelli, L. A.; Giommi, P.; Capria, M. T. +2 more
The increasing number and complexity of planetary exploration space missions require new tools to access, visualize and analyse data to improve their scientific return.
ASI Science Data Center (ASDC) addresses this request with the web-tool MATISSE (Multi-purpose Advanced Tool for the Instruments of the Solar System Exploration), allowing the…POLYCOMP: Efficient and configurable compression of astronomical timelines
Tomasi, M.
This paper describes the implementation of polycomp, a open-sourced, publicly available program for compressing one-dimensional data series in tabular format. The program is particularly suited for compressing smooth, noiseless streams of data like pointing information, as one of the algorithms it implements applies a combination of least squares …
The Gaia Attitude Star Catalog
Smart, R. L.
We describe the Attitude Star Catalog produced for the Gaia mission. This catalog is being used by Gaia for the first on-ground attitude reconstruction. Originally it was simply a subset of the Initial Gaia Source List but this subset did not meet the isolation requirements and it contained a significant number of double entries. As a result durin…
Spectral clustering for optical confirmation and redshift estimation of X-ray selected galaxy cluster candidates in the SDSS Stripe 82
Takey, A.; Mahmoud, E.; Shoukry, A.
We develop a galaxy cluster finding algorithm based on spectral clustering technique to identify optical counterparts and estimate optical redshifts for X-ray selected cluster candidates. As an application, we run our algorithm on a sample of X-ray cluster candidates selected from the third XMM-Newton serendipitous source catalog (3XMM-DR5) that a…