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Table 1

Continuum point source detection properties.

Day in march Frequency RAa Deca Obs-JPL#75b Obs-JPL#77c Obs-IMCCEd Fitted fluxe Corrected luxf
UT GHz h:min:s °:′:′′ (′′,′′) (′′,′′) (′′,′′) mJy mJy
3.917–4.333 157.2 14:46:22.870 +68:16:22.38 (–9, –2.6) (–4.4, –3.3) (–4.4, –3.4) 0.62 ± 0.13 0.81

Notes.

(a)

Apparent EQ 2000 positions of the 4.8σ brightness peak at the reference time 7h00 UT on 4 March 2012.

(b)

Offset (RA, Dec) in arcsecond between the observed continuum emission peak and the position derived from the JPL#75 solution for the comet’s orbital elements, which is based on astrometric measurements between August 2009 and January 2012. This is the solution which was used to track the comet.

(c)

Offset (RA,Dec) in arcsecond between the observed continuum emission peak and the position derived from the JPL#77 solution for the comet’s orbital elements. This solution takes into account astrometric measurements between August 2009 and October 2012.

(d)

Offset (RA,Dec) in arcsecond between the observed continuum emission peak and the position derived from the IMCCE solution for the comet’s orbital elements. This solution takes into account astrometric measurements between August 2009 and January 2013.

(e)

Flux obtained by fitting the Fourier transform of a point source to the observed visibilities. The error bars do not take into account uncertainties in the absolute flux calibration.

(f)

Continuum flux corrected for the primary beam attenuation (Gaussian profile with HPBW of 30.5′′). The error bars take into account a 10% uncertainty in the flux calibration.

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