1996A&A...313...91D

We detected the 2.9-mm nonthermal continuum emission from the z=3.4 radio galaxy B2 0902+343 at a level of 4.2±0.6mJy with the IRAM interferometer. The millimeter continuum source is unresolved with our 2.4" beam, and its position agrees with the unresolved nuclear component on centimeter-wavelength VLA maps. There is no evidence for any excess due to dust emission above the non-thermal continuum spectrum to a limit of 0.6mJy, corresponding to an upper limit of 2x10⁷M_☉ on the mass of 60K dust. The interferometer data show no evidence for any CO(4-3) line in the range z=3.396-3.402, to 2mJy in 100km/s channels. A search with the IRAM 30m telescope for CO(4-3) in the same redshift range also gave a non-detection to 2mJy. This limit is one-tenth the peak CO(3-2) line intensity of IRAS 10214+4724, and is about the line flux expected from ultraluminous IR galaxies at z=3.4.