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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Geochim Cosmochim Acta. 2018 Feb 10;226:107–131. doi: 10.1016/j.gca.2018.01.038

Table 1.

Areas analyzed by NanoSIMS, resultant number of presolar grains and matrix-normalized abundances of O-rich presolar grains.

Analyzed Area
(μm2)		 # Presolar Grains Abundance of presolar O-rich grains (ppm)
O-rich SiC Average Error −
(1σ)		 Error +
(1σ)		 Error −
(2σ)		 Error +
(2σ)
Area 2 10,820 43 7 299
Area 3 7,500 36 5 213
Area 6 3,000 11 0 217
Area 7 6,550 11 5 155
Total 101 17 257a 41 44 76 96
a

Excluding Area 7; errors estimated from Monte Carlo calculations (see text)