Open Access

Table A.1

Details of observations carried out with the IRAM 30m telescope.

Source Line τ225(a) Time(b) Dates of observation
(h) (dd-month-yy)
L1448-2A C18O (2−1) 0.29 1.9 04 June 2012; 16 October 2012
N2H+ (1−0) 0.69 2.3 17 November 2011; 30 May 2012

L1448-NB C18O (2−1) 0.28 2.3 16 November 2011; 17 November 2011; 16 October 2014
N2H+ (1−0) 0.43 3.1 17 November 2011; 18 November 2011; 03 June 2012

L1448-C C18O (2−1) 0.18 2.3 16 November 2011 ; 17 October 2014
N2H+ (1−0) 0.41 3.1 17 November 2011; 18 November 2011; 03 June 2012

IRAS2A C18O (2−1) 0.14 3.1 15 November 2011; 16 November 2011; 06 November 2014
N2H+ (1−0) 0.31 1.5 15 November 2011; 17 November 2011

SVS13-B C18O (2−1) 0.18 1.6 16 November 2012; 06 November 2014
N2H+ (1−0) 0.64 5.4 31 May 2012; 02 June 2012; 03 June 2012; 04 June 2012

IRAS4A C18O (2−1) 0.13 1.6 16 November 2012
N2H+ (1−0) 0.73 3.1 01 June 2012; 04 June 2012

IRAS4B C18O (2−1) 0.15 1.6 16 November 2012
N2H+ (1−0) 0.62 2.7 02 June 2012

IRAM04191 C18O (2−1) 0.17 1.9 16 November 2011
N2H+ (1−0) 0.59 3.5 17 November 2011; 18 November 2011; 02 June 2012

L1521F C18O (2−1) 0.23 2.3 21 October 2014
N2H+ (1−0) 0.58 5.8 18 November 2011; 30 May 2012; 03 June 2012; 04 June 2012

L1527 C18O (2−1) 0.18 2.3 21 October 2014; 05 November 2014; 06 November 2014; 10 November 2014
N2H+ (1−0) 0.64 5.2 01 June 2012; 02 June 2012; 04 June 2012; 31 May 2015

L1157 C18O (2−1) 0.10 2.8 04 June 2012; 16 November 2012
N2H+ (1−0) 0.60 6.1 30 May 2012; 31 May 2012; 01 June 2012

GF9-2 C18O (2−1) 0.09 3.1 04 June 2012; 16 November 2012; 05 November 2014
N2H+ (1−0) 0.55 4.2 30 May 2012; 03 June 2012

Notes. (a) τ225 is the zenith optical depth τ at a frequency of 225 GHz from the tipping taumeter. (b)Time is the total observed time spent on each molecular line for a given source.

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