Other
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0191m&link_type=abstract
American Astronomical Society, HEAD meeting #9, #1.91; Bulletin of the American Astronomical Society, Vol. 38, p.344
Other
Scientific paper
One of the first detectable signatures of a classical nova outburst is expected to be the positron-annihilation radiation due to beta+ decay of 13N (Hernanz et al. 2002, NewAR 48, 243). The short (14-minute) lifetime of the isotope requires an instrument with a full-sky field of view; observations triggered on optical detections of a nova would miss this emission by days. Instruments with high energy resolution have a distinct advantage, since the 511 keV line is expected to be blue-shifted away from the instrumental background line due to the ejection velocity of the shell (Harris et al. 2000, AIPC 510, 87). The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) spacecraft is well-suited for this search, having 9 large, high-resolution, unshielded germanium detectors. We will present preliminary results on the search for the line and its Comptonized continuum in the 2006 outburst of recurrent nova RS Oph and other novae since the launch of RHESSI in February 2002.
Hernanz Margarida
Matthews Tristan G.
Smith Masson D.
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