Integrated intensity map (core; from +5 to +10 km s-1) of H2CO 51,5–41,4 in colors, overplotted with its blue (from −5 to +5 km s-1) and red (from +10 to +17 km s-1) wing emission in blue and red contours, respectively. H2CO peaks toward IRAS 4B and shows a weak emission toward IRAS 4C, but is not connected to outflows. Note also the small peak to the southwest of IRAS 4A. The red and blue contour levels are set to 10, 30, 50, 70, and 100 × rms (rms: 0.02 K).
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