Spatial distributions of molecules detected toward L1521E (black contours) overplotted on N(H₂) map (colors) derived from Herschel/SPIRE. The black dot, triangle, and asterisk show the c-C₃H₂, CH₃OH, and HNCO peaks, respectively. The black square shows the Herschel dust peak. The beam size overplotted on the SO map shows the beam size of the SPIRE data, for the other maps it is the beam size of the IRAM-30 m data. For SO, CS, ¹³CS, C₂S, and C³⁴S the contour levels start from 3σ rms in steps of 3σ rms with 3σ rms values of 0.13, 0.38, 0.06, 0.12, and 0.11 K km s⁻¹, respectively. For OCS and C³³S the contour levels start from 6σ rms in steps of 4σ rms with 3σ rms levels of 0.02 K km s⁻¹ for both species. For ³⁴SO, C³S, CC³⁴S, H₂CS, and HCS⁺ the contour levels start from 9σ rms in steps of 6σ rms with 3σ rms values of 0.01, 0.02, 0.01, 0.07, and 0.03 K km s⁻¹, respectively.