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OBSERVATION OF A0535+26 AT ENERGIES ABOVE 150 KEV WITH THE FIGARO-II EXPERIMENT

CUSUMANO, G ; MINEO, T ; SACCO, B ; SCARSI, L ; GERARDI, G ; AGRINIER, B ; BAROUCH, E ; COMTE, R ; PARLIER, B ; MASNOU, JL ; MASSARO, E ; MATT, G ; COSTA, E ; SALVATI, M ; MANDROU, P ; NIEL, M ; OLIVE, JF

The Astrophysical journal, 1992-10, Vol.398 (2), p.L103-L106 [Periódico revisado por pares]

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Título:
OBSERVATION OF A0535+26 AT ENERGIES ABOVE 150 KEV WITH THE FIGARO-II EXPERIMENT
Autor: CUSUMANO, G ; MINEO, T ; SACCO, B ; SCARSI, L ; GERARDI, G ; AGRINIER, B ; BAROUCH, E ; COMTE, R ; PARLIER, B ; MASNOU, JL ; MASSARO, E ; MATT, G ; COSTA, E ; SALVATI, M ; MANDROU, P ; NIEL, M ; OLIVE, JF
Assuntos: Astronomy ; Astronomy & Astrophysics ; Earth, ocean, space ; Exact sciences and technology ; Physical Sciences ; Science & Technology ; Stellar systems. Galactic and extragalactic objects and systems. The universe ; Unidentified sources and radiation outside the solar system ; X-ray sources ; x-ray bursts
É parte de: The Astrophysical journal, 1992-10, Vol.398 (2), p.L103-L106
Descrição: The transient pulsating X-ray source A0535 + 26 was observed by the FIGARO II gamma-ray experiment on 1990 July 9. The periodogram of about 6 hr of data shows only one significant signal (3.5 sigma) at the period of 103.2 s, very close to the expected one. The folded light curve is characterized by a double-peak structure and a narrow dip; It is similar to that at lower energies. The pulsed flux is (8.6 +/- 2.3) x 10(-6) photons cm-2 s-1 keV-1 in the 148-260 keV band. We also find evidence of a low-energy cutoff below 167 keV.
Editor: CHICAGO: Univ Chicago Press
Idioma: Inglês

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