Gas and dust in the star-forming region ρ Oph A - The dust opacity exponent β and the gas-to-dust mass ratio g2d

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Volume 578 (June 2015)

A&A, 578 (2015) A131

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Table 1

Log of observations.

Instrument	Prog/Obs ID	Mode	Frequency	Beam	Observing date	t_int	Map dimension	PA
	ESO/Herschel		(GHz)	HPBW	yy–mm–dd	(s)	RA × Dec

APEX-2^a	090.F-9319(A)	N₂H⁺ (3−2)	279.515067	22′′	12–09–22 to 25	65160	426 × 432	0°
HIFI^b	1342204010^c	N₂H⁺ (6−5)	558.957500	38′′	10-09-01	6552	50 × 20	35°
	1342251245^d				12-09-21	3608	58 × 10	35°
	1342251246^e				12-09-21	5712	50 × 20	125°
	1342251247^f				12-09-21	5712	50 × 20	125°
	1342251429^g				12-09-26	3608	58 × 10	35°
LABOCA^a	090.F-9304(A)	Continuum	345	195	12–08–17	9298	383 × 355	0°
SABOCA^a	090.F-9304(B)	Continuum	852	75	12–08–22	20419	775 × 785	0°

Notes.

^(a)

Map offsets refer to α₂₀₀₀ = 16^h26^m2790, δ₂₀₀₀ = −24°23′570.

^(b)

The HIFI data refer to OD 475 on 10-09-01 and OD 1221 on 12-09-16 and OD 1231 on 12-09-26, with a total integration time of 25192 s.

^(c)

Observed centre coordinates are α₂₀₀₀ = 16^h26^m2638, δ₂₀₀₀ = −24°24′31′′;

^(d)

16^h26^m1379, −24°22′31′′;

^(e)

16^h26^m2130, −24°26′15′′;

^(f)

16^h26^m3173, −24°22′47′′;

^(g)

16^h26^m3897, −24°26′32′′.

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