Free Access

Table 2

Target and calibrator sources.

Object/Coordinates σpos[mas]

Crab-Aa
α J2000   05h34m32332  ~10
δ J2000 +22°00′5245  ~10
J0518+2054b
α J2000   05h18m03824510 0.12
δ J2000 +20°54′5249739 0.12

Notes. σpos – position errors in right ascension and declination.

References.

a

Tavani et al. (2011) and this work;

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.