Rapid angular expansion of the ionized core of CRL 618

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Table 3

Calibration parameters of the observation on epoch 1998.33.

Frequency	Flux/phase calibrator	S _ν ¹	rms noise³		Beam⁴

(GHz)	(name)	(Jy)	(Jy beam^-1)		(′′, °)

1.43	J0443+3441	0.70	5.3 × 10^-5	2.0	× 1.6, −66
4.89	J0443+3441	0.93	3.5 × 10^-5	0.63	× 0.52, −72
8.44	J0443+3441	0.74	4.7 × 10^-5	0.34	× 0.28, −71
14.96	J0443+3441	0.50	1.7 × 10^-4	0.20	× 0.16, −77
22.49	J0443+3441	0.35²	3.9 × 10^-4	0.14	× 0.10, −79
43.31	J0443+3441	0.20	3.1 × 10^-4	0.046	× 0.043, 30

Notes.

⁽¹⁾

Assumed value for the primary flux calibrator, obtained from the NRAO VLA calibrators webpage.

⁽²⁾

Interpolated value from the SED of the flux calibrator.

⁽³⁾

rms noise in the image of the target source made with natural-robust weighting.

⁽⁴⁾

Size and position angle of the synthesized beam using natural-robust weighting.

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