APEX observations of ortho-H2D+ towards dense cores in the Orion B9 filament

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Table 2

Observational parameters.

Source	t_ON	PWV	T_sys ^(a)	1σ rms ^(a)
	[min]	[mm]	[K]	[mK]
IRAS 05399-0121	46.4	0.6−1.0	655	28
SMM 1	32.1	0.6−1.0	600	33
SMM 3	22.4	0.3−1.0	581	33
IRAS 05405-0117	38.4	0.4−1.0	605	28
SMM 6	17.6	0.4−1.0	459	29
SMM 7	20.8	0.4−1.0	468	29

Notes. ^(a) The system temperatureand 1σ rms noise level are given in the main-beam brightness temperature scale.

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