AN ARCMINUTE-RESOLUTION SEARCH AT 4.7 INVERSE CENTIMETERS FOR POINT-SOURCE CONFUSION TO MEASUREMENTS OF CMB ANISOTROPY

We have searched for millimeter-wave emission from compact objects in two fields, each approximately 1 deg(2) in size, taken from regions of the sky in which degree-scale structure in the cosmic microwave backg round (CMB) has recently been reported. The observations were made at a frequency of 4.7 cm(-1) and an angular resolution of 1.'7, using the Sunyaev-Zeldovich Infrared Experiment (SuZIE) bolometer array at the Caltech Submillimeter Observatory (CSO). The first field was centered on 14(h)92, +82 degrees (1994.0), one of two regions in which Cheng et al. (1994) identify the signature of an unresolved point source seen during 0.degrees 5 resolution observations at 5.6 cm(-1) with the Medi um Scale Anisotropy Measurement (MSAM) experiment. The second held was centered on 15.(h)47, +72.degrees 4 (1994.0), part of the Gamma Ursae Minoris (GUM) region in which structure has been detected by Devlin e t al. (1994) in 0.degrees 55 resolution observations at 3.5 and 6 cm(- 1) 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.degrees 5 resolution, and that the structure must arise from objects with an angular size greater than 2'.