in dual-circular polarization and at sample rate of 1024 megabit per second (Mbps). Eight intermediate frequency bands, each of 16 MHz each and 32 spectral channels, were used. The data correlation was performed at JIVE[^8] with an averaging time of 4 sec.

The calibration of the correlated data was performed using AIPS[^9]. Amplitudes were calibrated using the gains of the antennas and system temperatures. The data were then fringe-fitted using the phase calibrator. Delay, delay rate, and phase solutions derived from the phase calibrator were interpolated and applied to the target. The imaging was performed using CLEAN deconvolution with the AIPS task IMAGR. Natural weighting images were produced from non-channel-averaged data[^10] and imaging two fields of view (FOV) derived from the positional errors of the VLA and *Chandra* ULX counterparts: one of $\sim$1 $\times$ 1 arcsec$^{2}$ centered at the *Chandra* position, and another one of $\sim$5 $\times$ 5 arcsec$^{2}$ centered at the VLA position. The restoring beam size was 5.7 mas $\times$ 4.5 mas. To enhance the sensitivity, we also repeated the multi-field imaging without using the baselines longer than 20 M$\lambda$.

We did also recalibrate the 1.6 GHz EVN data previous analyzed by [@2011AN....332..379M] and reimaged the data without 