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Proceedings Paper

AIR WATCH: air-induced fluorescence by radiation laboratory experiments
Author(s): Salvatore Giarrusso; Osvaldo Catalano; Filippo Celi; G. Fazio; Giovanni La Rosa; G. Richiusa; T. Schillaci; Giovanni Bonanno; Rosario Cosentino; Rosario Di Benedetto; Salvatore Scuderi
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Paper Abstract

We report preliminary measurements of the air UV fluorescence light yield as a function of pressure using as a stimulus hard x-rays. For comparison measurements in pure nitrogen are also reported. Knowledge of the air UV fluorescence light yield induced by hard x-rays is needed in order to evaluate the capability to detect, in an AIRWATCH FROM SPACE experiment, Gamma Ray Burst (GRB) events. The experiment was carried out a the LAX x-ray facility in Palermo, by using an high flux collimated x-ray photon beam. The experimental result indicate that the fluorescence yield is inversely proportional to the filling pressure. At pressures below 30 mbar, corresponding to the value for the upper atmospheric layers in which the X and gamma ray photons of the GRBs are absorbed, about 0.1 percent of the total energy of a GRB is transformed in UV photons. This makes possible the observation of the GRBs with the technique proposed in the AIRWATCH FROM SPACE experiment.

Paper Details

Date Published: 10 November 1998
PDF: 10 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330306
Show Author Affiliations
Salvatore Giarrusso, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica (Italy)
Osvaldo Catalano, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica (Italy)
Filippo Celi, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica (Italy)
G. Fazio, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica (Italy)
Giovanni La Rosa, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica (Italy)
G. Richiusa, Univ. di Palermo (Italy)
T. Schillaci, Univ. di Palermo (Italy)
Giovanni Bonanno, Osservatorio Astrofisico di Catania (Italy)
Rosario Cosentino, Osservatorio Astrofisico di Catania (Italy)
Rosario Di Benedetto, Osservatorio Astrofisico di Catania (Italy)
Salvatore Scuderi, Osservatorio Astrofisico di Catania (Italy)


Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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