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Astron. Astrophys. 345, L43-L46 (1999)

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2. Observations

2.1. 7mm continuum

The [FORMULA]mm observations were taken on October 4, 1997 with the VLA in the DnC hybrid configuration. We used the 13 antennas equipped with [FORMULA]mm receivers to observe I20126 in the fast switching mode with the phase calibrator source 2005+403, using a cycle time of [FORMULA]sec, and observing in standard continuum mode with a total bandwidth of [FORMULA]MHz. Flux calibration is based on observations of 3C48, for which we assumed a flux density of [FORMULA]Jy in the [FORMULA]mm band. A natural weighted [FORMULA] pixel map was made with a pixel size of [FORMULA]. The resulting beam size is [FORMULA] at a position angle of [FORMULA], and the [FORMULA] rms value in the map is [FORMULA]mJy beam-1.

2.2. 3.6cm continuum

On August 18, 1998 we used the VLA in the B configuration to observe the [FORMULA]cm continuum toward I20126. Visibility amplitude and phase were calibrated by frequent observations of the calibrator source 2005+403, and the flux density scale was set by observations of 3C48 for which we assumed a flux density of [FORMULA]Jy at [FORMULA]cm. Images with [FORMULA] pixels with a pixelsize of [FORMULA] were made using different weighting schemes. Our uniformly weighted map has a synthesized beam of [FORMULA] and a [FORMULA] rms noise level of [FORMULA]Jy beam-1.

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© European Southern Observatory (ESO) 1999

Online publication: April 28, 1999
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