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We present submillimeter continuum observations at 870 microns of the coresof low redshift 3CRR radio galaxies, observed at the Heinrich HertzSubmillimeter Telescope. The cores are nearly flat spectrum between the radioand submillimeter which implies that the submillimeter continuum is likely tobe synchrotron emission and not thermal emission from dust. The emitted powerfrom nuclei detected at optical wavelengths and in the X-rays is similar in thesubmillimeter, optical and X-rays. The submillimeter to optical and X-ray powerratios suggest that most of these sources resemble misdirected BL Lac typeobjects with synchrotron emission peaking at low energies. However we findthree exceptions, the FR I galaxy 3C264 and the FR II galaxies 3C390.3 and3C338 with high X-ray to submillimeter luminosity ratios. These three objectsare candidate high or intermediate energy peaked BL Lac type objects. Withadditional infrared observations and from archival data, we compile spectralenergy distributions (SEDs) for a subset of these objects. The steep dipsobserved near the optical wavelengths in many of these objects suggest thatextinction inhibits the detection and reduces the flux of optical continuumcore counterparts. High resolution near or mid-infrared imaging may providebetter measurements of the underlying synchrotron emission peak.Comment: accepted for publication in A

870 Micron Observations of Nearby 3CRR Radio Galaxies