IRAM-NOEMA Interferometer, 3mm receiver, Widex and Narrow-band correlators. <P />Observations with the IRAM NOEMA Interferometer of HC<SUB>3</SUB>N (9-8) and HC<SUB>5</SUB>N (31-30), at rest frequencies 81.881468GHz and 82.539039GHz , respectively, towards OMC-2 FIR4 have been carried out over 5 days between the 5th and the 19th of August, 2015. <P />The HC<SUB>3</SUB>N line was observed in the Widex band correlator, providing a resolution in velocity of ~7.15km/s, while the HC<SUB>5</SUB>N line was observed also in the Narrow band correlator with a resolution in velocity of ~0.57km/s. (2 data files).