A search for radio emission from exoplanets around evolved stars

E. O’Gorman; C. P. Coughlan; W. Vlemmings; E. Varenius; S. Sirothia; T. P. Ray; H. Olofsson

doi:10.1051/0004-6361/201731965

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Volume 612 (April 2018)

A&A, 612 (2018) A52

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Table 2

LOFAR 150 MHz observations of the three evolved stars.

	Date	Bandwidth	Time	Flux	Delay/rate/	Synthesized	σ_rms
			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
					J0746+2734
ι Dra	2015 Apr 22,23	31.64	6.5	3C295	J1604+5714	5.3 × 3.7, 91	290
					J1527+5849
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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