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Table 2

LOFAR 150 MHz observations of the three evolved stars.

Date Bandwidth Time Flux Delay/rate/ Synthesized σrms
on source calibrator phase beam FWHM
(MHz) (h) calibrator(s) (″ × ″, °) (μJy beam−1)
β Gem 2015 Feb 17,19 31.64 7.0 3C196 J0741+3112 7.5 × 3.8, 57 325
ι Dra 2015 Apr 22,23 31.64 6.5 3C295 J1604+5714 5.3 × 3.7, 91 290
β UMi 2015 May 05,06 47.66 7.0 3C295 J1448+7601 7.3 × 5.4, 76 190

Notes. The delay, rate, and phase calibrators were included in our observational setup to enable the calibration of the international baselines if desired. Data from only the core and remote stations are used in this paper and so these calibrators were not used in our data reduction.

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