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The Crab pulsar light curve in the soft gamma ray range: FIGARO II resultsThe FIGARO II experiment (a large area, balloon borne, crystal scintillator detector working from 0.15 to 4.3 MeV) observed the Crab pulsar on 1990 Jul. 9 for about seven hours. The study of the pulse profile confirms some structures detected with a low significance during the shorter observation of 1986, and adds new important elements to the picture. In particular, between the two main peaks, two secondary peaks appear centered at phase values 0.1 and 0.3, in the energy range 0.38 to 0.49 MeV; in the same energy range, a spectral feature at 0.44 MeV, interpreted as a redshifted positron annihilation line, was observed during the same balloon flight in the phase interval including the second main peak and the neighboring secondary peak. If the phase interval considered is extended to include also the other secondary peak, the significance of the spectral line appears to increase.
Document ID
19920012659
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Massaro, E. (La Sapienza Univ. Rome (Italy)., United States)
Agrinier, B. (Commissariat a l'Energie Atomique Saclay (France)., United States)
Barouch, E. (Commissariat a l'Energie Atomique Saclay (France)., United States)
Comte, R. (Commissariat a l'Energie Atomique Saclay (France)., United States)
Costa, E. (Consiglio Nazionale delle Ricerche Palermo (Italy)., United States)
Cusumano, G. C. (Palermo Univ. (Italy). Saclay (France)., United States)
Gerardi, G. (Commissariat a l'Energie Atomique Toulouse (France)., United States)
Lemoine, D. (Centre d'Etude Spatiale des Rayonnements Rome, Italy)
Mandrou, P. (La Sapienza Univ.)
Masnou, J. L. (Observatoire de Paris-Meudon)
Date Acquired
September 6, 2013
Publication Date
February 1, 1992
Publication Information
Publication: NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop
Subject Category
Astrophysics
Accession Number
92N21902
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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