Dirty maps of the continuum emission from the VLBA project BS0233. Map center of the two images: RA: 20 57 24.377, Dec: +17 07 39.144. Right panel: Cell size of about 8 mas and estimated dirty beam of about 22.28 mas × 36.8 mas at 38.0 degree; the 1σ noise is about 23.2 μJy/beam. Left panel: Cell size of about 1 mas and the estimated dirty beam of about 4.83 × 11.5 at 2.1 degree; the 1σ noise is about 14.8 μJy/beam.