The method

Using the standard flux calibrater 3C48 and the AIPS tasks SETJY, CALIB (AIPS adverb UVRAN set to 0,2 for $J1829+487$) and GETJY, the P-band flux for $J1829+487$, using only the Central square antennas, was determined to be 43.89$\pm$0.84 Jy. All antennas other than the central square antennas were excluded at this step since not enough baselines $<2K\lambda$ were found to provide good solutions for the gains of the arm antennas. Fig. 2 shows the calibrated visibilities (i.e. amplitude and phase) for the central square antennas. A map of $J1829+487$ was then obtained using the central square data only. This map, which would be used as the model at the next stage, was also Self-calibrated (see Fig. 2).

In the case with no UVLIMIT on $J1829+487$, one could have obtained gains for all the antennas. However since this is not the case, one needs to bootstrap starting from a uv-range of $2K\lambda$, to obtain the gains for the arm antennas. Following are the three possible routes for bootstrapping: