Quiet, but not silent - The X-ray activity of the Maunder minimum star HD 166620

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Table C.1.

Instrument-specific CFs to convert count rates for FGK dwarfs into 0.1–2.4 keV ROSAT band fluxes.

Instrument	obs. energy band	CF_FGK
	(keV)	( $10^{- 12} erg {cm}^{- 2} {cts}^{- 1}$ $10^{-12}\,\rm{erg\,cm^{-2}\,cts^{-1}}$ )
ROSAT PSPC-C	0.1–2.4	5.77
ROSAT PSPC-B (before 1991 Oct 14)	0.1–2.4	5.87
ROSAT PSPC-B (after 1991 Oct 14)	0.1–2.4	5.92
eROSITA	0.2–2.3	1.06
XMM-Newton EPIC/pn; thin Filter	0.2–12.0	1.60
XMM-Newton EPIC/pn; medium Filter	0.2–12.0	1.71
XMM-Newton EPIC/pn; thick Filter	0.2–12.0	2.35

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