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Table 10

Comparison of measured wavelengths from the RGS and LETGS.

Transition RGS LETGS RGS − LETGS
(Å) (Å) (mÅ)

O viii 1s–3p 16.5460 ± 0.0023 16.552 ± 0.004 −6 ± 5
O vii 1s–3p 19.2649 ± 0.0029 19.269 ± 0.007 −4 ± 8
O viii 1s–2p 19.6146 ± 0.0012 19.619 ± 0.004 −4 ± 4
O vii 1s–2p 22.3354 ± 0.0018 22.346 ± 0.004 −11 ± 4

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