Slit Positions in HH 47A

Top: HST images of HH 47A in H-alpha (left) and [S~II] (right) taken from Heathcote etal (1996). The FOS slit positions of the bow shock (BS) and Mach disk (MD) are shown superposed upon the H-alpha image. The directions north and east are shown. The position angle of the slit was 326.9 degrees for both the MD and BS observations. Bottom: The H-alpha - [S II] image of HH 47A from Heathcote etal (1996), showing positions of the shock fronts as strong H-alpha emission. Arrows denote motion of the gas with respect to HH 47A, which itself moves away a young star located well off the lower right portion of the figure.