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Table 1

Summary of EVN observations (code ES071).

Absolute position (±1 mas)
Epochsa Run ν rest Δv V LSR RA (J2000) Dec (J2000) HPBW rms
(gg/mm/aa) (h) (MHz) (km s-1) (km s-1) (h m s) (°′′) (mas) (mJy beam-1)

01/03/13–28/02/14–13/03/15 8 6668.5 0.04 –1.73 22:56:17.9089 62:01:49.527 4.5 4–6

Notes. Columns 1 and 2: observing dates and duration of each run. Columns 3 and 4: rest frequency and velocity resolution of the maser lines. Columns 5–7: local standard-of-rest velocity and measured absolute position of the reference maser spot used for calibration. Column 8: restoring beam size (round) used at each epoch. Column 9: thermal noise achieved per line-free channel map at each epoch (Stokes I).


The EVN operated with 8 antennas at the first two epochs (EF, WB, JB, ON, MC, NT, TR, YS), with the addition of SR during the last epoch.

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