An arcminute-resolution search at 4.7 inverse centimeters for point source confusion to mesurements of CMB anisotropy

We have searched for millimeter-wave emission from compact objects in two fields, each approximately 1 sq deg in size, taken form regions of the sky in which degree-scale structure in the cosmic microwave background (CMB) has recently been reported. The observations were made at a frequency of 4.7 1 cm and an angular resolution of 1.7 min, using the Sunyaev-Zeldovich Infrared Experiment (SuZIE) bolometer array at the Caltech Submillimeter Observatory (CSO). The first field was centered on 14.92 hours, +82 deg (1994.0), one of two regions in which Cheng et al. (1994) identify the signature of an unresolved point source seen during 0.5 deg resolution observations at 5.6 1 cm with the Medium Scale Anisotropy Measurement (MSAM) experiment. The second field was centered on 15.47 hours, +72.4 deg (1994.0), part of the Gamma Ursae Minoris (GUM) region in which structure has been detected by Devlin et al. (1994) in 0.55 deg resolution observations at 3.5 and 6 1 cm with the Millimeter Anisotropy eXperiment (MAX). We find that there is no point source in either field that can account for the structure observed at 0.5 deg resolution, and that the structure must arise from objects with an angular size greater than 2 mins