4 papers
Identification of Relativistic Effects in X-Ray Astrophysical Source
Costantino Sigismondi
Precise knowledge of the features of several X-ray sources from compact binary sources to galactic nuclei is gradually unveiling the physical parameters of relativistic neutron sta…
The Observation of Lunar Impacts. Part II
C. Sigismondi, G. P. Imponente
The frequency and the characteristics of lunar impacting meteorites are reconsidered under the general assumption of belonging to the sporadic meteoroids. We develop the model for…
On the Fine Structure in the Fireballs Peak of the 1998 Leonids
Costantino Sigismondi
The Leonids meteor shower of November 1998 has shown a double activity. An unexpected shower of fireballs occurred about 16 hours before the expected maximum of the meteor activity…
The Observation of Lunar Impacts
Giovanni Imponente, Costantino Sigismondi
The intense activity of cratering on the Moon and in the inner regions of the solar system was accomplished during the first 10^9 years [1]. Occasionally, some impact events occur…