**Table 3:** Spectral and time response calibrations: for all channels (named in Col. 1) we report in the second column the average frequency, and in the third column the optical bandwidth $\Delta \nu = \left( \int e(\nu) {\rm d}\nu \right)^2/\!\int e^2(\nu) \rm d\nu$ . Here $e(\nu )$ are the transmission spectra of Fig. 10. The conversion factor between Specific Brightness and CMB temperature fluctuations, as computed from the same spectra, is reported in the fourth column. Spectral normalizations and flat band optical efficiencies are measured using NDF-up load curve power differences. The spectral normalization $\eta$ (fifth column) is calculated using the spectral response from the FTS measurements. The optical efficiency $\langle \eta e(\nu) \rangle_{\rm band}$ (sixth column) is calculated assuming a flat spectral response. The detectors are assumed to be single-moded. The high optical efficiency of the 345 GHz channels is likely due to propagation of multiple modes to the detector. The time constant $\tau$ is reported in the seventh column, as measured in the laboratory with loading conditions similar to the flight ones.
Channel	$\langle \nu \rangle$ (GHz)	$\Delta \nu$ (GHz)	${{\rm MJy/sr} \over K_{\rm CMB}}$	Spec. Norm.	Opt. Eff.	$\tau$ (ms)
145W1	147.3	46.9	388	0.35	0.26	89
145W2	146.7	45.3	387	0.35	0.26	50
145X1	146.2	46.1	386	0.37	0.28	58
145X2	146.6	45.5	387	0.33	0.25	43
145Y1	147.0	46.7	388	0.38	0.29	97
145Y2	146.8	46.6	387	0.38	0.31	82
145Z1	147.0	46.2	388	0.26	0.19	66
145Z2	147.1	47.6	388	0.21	0.14	81
245W	248.0	94.6	461	0.38	0.33	12
245X	250.7	87.6	460	0.36	0.28	20
245Y	244.0	89.6	465	0.33	0.27	15
245Z	247.6	96.0	461	0.32	0.27	16
345W	340.3	134.7	321	0.81	0.70	7.9
345X	338.9	137.1	323	0.89	0.77	8.0
345Y	344.1	131.7	314	0.82	0.72	4.7
345Z	337.8	131.3	326	0.87	0.68	12

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