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Fig. 1


Main line detections of the spectra extracted for the three positions of NGC 1333: IRAS 4A, IRAS 4B, and IRAS 4C covering the full JCMT range 330373 GHz. The gap seen at 368369.5 GHz is due to poor atmospheric transmission. The spectra are plotted with a vertical offset at 0.3, 0.7 and 1.1 intensity levels (K) to facilitate comparison. The coordinates of the three sources IRAS 4A (RA = 03:29:10.51, Dec = 31:13:31.4 (J2000)), IRAS 4B (RA = 03:29:12.01, Dec = 31:13:08.0 (J2000)) and IRAS 4C (RA = 03:29:13.64, Dec = 31:13:57.5 (J2000)) are taken from Sandell & Knee (2001).

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