Free Access

Table 2

Observational parameters of the APEX observations (this work; IRS7B line survey and CrA source survey) and the ASTE line survey of IRS7B (Watanabe et al. 2012).

Window Frequency range Beam size
[GHz] [′′] [AU]

IRS7B survey 217.2–245.5a 26–29 3300–3800
1.4 mm 216.1–220.1 29 3700
0.9 mm 336.9–340.9 19 2400
0.8 mm 361.8–365.8b 17 2200

ASTE 0.8 mm 332.0–364.0 21–23 2700–3000
ASTE 0.7 mm 435.0–437.0 17 2300
ASTE 0.7 mm 459.2–461.2 16 2100

Notes.

(a)

The 217.2–217.9 GHz portion is only covered at a low S/N level.

(b)

In most sources only 361.8–364.3 GHz, due to high noise levels and baseline issues in the upper sideband.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.