We present a catalog of spectral measurements covering a 100–200-MHz band for 32 sources , derived from observations with a 64-antenna deployment of the Donald C. Backer Precision Array for Probing the Epoch of Reionization ( PAPER ) in South Africa . For transit telescopes such as PAPER , calibration of the primary beam is a difficult endeavor , and errors in this calibration are a major source of error in the determination of source spectra . In order to decrease reliance on accurate beam calibration , we focus on calibrating sources in a narrow declination range from -46° to -40° . Since sources at similar declinations follow nearly identical paths through the primary beam , this restriction greatly reduces errors associated with beam calibration , yielding a dramatic improvement in the accuracy of derived source spectra . Extrapolating from higher frequency catalogs , we derive the flux scale using a Monte-Carlo fit across multiple sources that includes uncertainty from both catalog and measurement errors . Fitting spectral models to catalog data and these new PAPER measurements , we derive new flux models for Pictor A and 31 other sources at nearby declinations , 90 % are found to confirm and refine a power-law model for flux density . Of particular importance is the new Pictor A flux model , which is accurate to 1.4 % and shows , in contrast to previous models , that between 100 MHz and 2 GHz , the spectrum of Pictor A is consistent with a single power law given by a flux at 150 MHz of 382 \pm 5.4 Jy , and a spectral index of -0.76 \pm 0.01 . This accuracy represents an order of magnitude improvement over previous measurements in this band , and is limited by the uncertainty in the catalog measurements used to estimate the absolute flux scale . The simplicity and improved accuracy of Pictor A ’ s spectrum make it an excellent calibrator in a band of importance to experiments seeking to measure 21cm emission from the Epoch of Reionization .