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Table 1

Observed noise and continuum brightness, in Tmb.

IF [0′′, 0′′] MP1 [10′′, − 10′′] CP1 [− 28′′, 10′′]

Species rms T c rms T c rms T c
[mK] [K] [mK] [K] [mK] [K]

CH+ 25 0.45 129 0.57a 153 0.26a
OH+ 21 0.57 60 0.72 19 0.33
H2O+ 180 0.67a 40 0.85 280 0.39a

Notes. Noise rms values have been calculated on a Tmb scale with Δv = 0.5 km s-1.

(a)

The observed continuum level is not reliable, and the value reported here is an estimate based on the OH+ continuum (see text).

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