Browsing by Autor "C. Morello"

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    Búsqueda de "GRBs" de GeV con el experimento INCA
    (1999) Renán Cabrera; A. Castellina; P. L. Ghia; F. Kakimoto; Takeo Kaneko; C. Morello; G. Navarra; K. Nishi; O. Saavedra; G. Trinchero
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    Search for 100 TeV gamma-rays from SN 1987 A
    (Springer Nature, 1990) C. Castagnoli; C. Morello; G. Navarra; L. Periale; P. Vallania; J. A. Chinellato; M. de Castro Souza; A. Turtelli; P. Miranda; A. Velarde
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    Search for GeV GRBs at Chacaltaya
    (1998) A. Castellina; P. L. Ghia; C. Morello; G. Trinchero; P. Vallania; S. Vernetto; G. Navarra; O. Saavedra; H. Yoshii; T. Kaneko
    In this paper we present the results of a search for GeV Gamma Ray Bursts made by the INCA experiment during the first 9 months of operation. INCA, an air shower array located at Mount Chacaltaya (Bolivia) at 5200 m a.s.l., has been searching for GRBs since December 1996. Up to August, 1997, 34 GRBs detected by BATSE occurred in the field of view of the experiment. For any burst, the counting rate of the array in the 2 hours interval around the burst trigger time has been studied. No significant excess has been observed. Assuming for the bursts a power low energy spectrum extending up to 1 TeV with a slope α=−2 and a duration of 10 s, the obtained 1 GeV-1 TeV energy fluence upper limits range from 7.9 10−5 erg cm−2 to 3.5 10−3 erg cm−2 depending on the event zenith angles.
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    Search for GeV GRBs with the INCA experiment
    (EDP Sciences, 1999) Renán Cabrera; A. Castellina; P. L. Ghia; F. Kakimoto; T. Kaneko; C. Morello; G. Navarra; K. Nishi; O. Saavedra; G. Trinchero
    INCA is an air shower array located at Mount Chacaltaya in Bolivia, at 5200 m a.s.l., searching for Gamma Ray Bursts of energy GeV. The results presented here concern a GRB search made in correlation with 70 events recorded by BATSE since December 1996 to August 1998. For every burst, the INCA counting rate has been studied both during the BATSE detection time and in 2 hours around. No significant excess has been found in any of the trials. Assuming for the burst a power low energy spectrum extending up to 1 TeV with a slope and a time duration of 10 s, the obtained energy fluence upper limits range from to depending on the event zenith angle.