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Table 1

Description of columns in the catalogue of the final sample available at the CDS.

Column number Column name Description

1 COUP_no COUP identification number
2 RA RA from the COUP catalogue
3 Dec Dec from the COUP catalogue
4 NH NH from the COUP catalogue [cm-2]
5 NH_err 1σ error of NH as assumed in this work [cm-2]
6 VISION_no VISION identification number
7 J J magnitude from VISION [mag]
8 J_err 1σ error of J magnitude from VISION [mag]
9 H H magnitude from VISION [mag]
10 H_err 1σ error of H magnitude from VISION [mag]
11 Ks Ks magnitude from VISION [mag]
12 Ks_err 1σ error of Ks magnitude from VISION [mag]
13 sptype Spectral type as deduced from Hillenbrand et al. (2013)
14 JH0 Intrinsic (JH) magnitude as deduced from Scandariato et al. (2012) [mag]
15 JH0_err 1σ error of intrinsic (JH) magnitude [mag]
16 HK0 Intrinsic (HKs) magnitude as deduced from Scandariato et al. (2012) [mag]
17 HK0_err 1σ error of intrinsic (HKs) magnitude [mag]
18 AV AV for RV = 3.1a as deduced in this work [mag]
19 AV_err 1σ error of AV for RV = 3.1 as deduced in this work [mag]
20 class Classification (p – protostar, d – disc star, cl3 – Class III source, uncl – unclassified)



AV for RV = 5.5 can be calculated by multiplication with the factor 1.18 (see Sect. 4.2.2).

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