TGRS and the 478 keV line from 7Be in novae

Details TGRS and the 478 keV line from 7Be in novae TGRS and the 478 keV line from 7Be in novae

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..513h&link_type=abstract

GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 513-517 (2001).

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X- And Gamma-Ray Telescopes And Instrumentation, Gamma-Ray, Novae, Dwarf Novae, Recurrent Novae, And Other Cataclysmic Variables, Galactic Center, Bar, Circumnuclear Matter, And Bulge

Scientific paper

We obtain limits on γ-ray line emission at 478 keV from both known and undiscovered novae. The instrument has good spectral resolution and a complete view of the southern ecliptic hemisphere. Although most of this field of view of unmodulated and acquires only background spectra, an occulter, taking advantage of the 3 s rotation period of the Wind satellite, modulates signals from the Galactic center (GC). The backgrounds are low and extremely stable, allowing us to extract cosmic signals from the background spectrum. The instrumental background contribution to the 478 keV line is described by a simple model; no departures from it (i.e. nova signals) were detected during 1995-1997. In a separate analysis the quasi-steady emission at 478 keV from integrated novae towards the GC is measured in the occulted data set. .

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