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Through the use of a High Band Antenna system, the Low Frequency ArrayTwo-Meter Sky Survey (LoTSS) is an attempt to complete a high-resolution surveyof the northern celestial sky. To date, thousands of radio sources have beenclassified by LOFAR with most of them consisting of active galactic nuclei(AGN). The strong AGN emissions detected by LoTSS, it is thought, are poweredby supermassive black holes (SMBHs) at the center of galaxies. During ananalysis of 1500 images of these AGNs, we identified 10 radio sources withradial spokes emitted from an unknown source. According to LOFAR, the radialspokes are artifacts due to calibration errors with no origin, and thereforethey cannot be associated with an optical source. Our preliminary hypothesisfor the artifacts was that they were produced by ionized jets emitted fromquasi-stellar objects (QSOs). Specifically, that strong emissions from Type 1broadline (BL) quasars were directed in the line of sight of the observer(i.e., LOFAR) and as a result produced the image artifacts. To test ourhypotheses, we cross-referenced the ra and dec coordinates of the artifactswith the galactic coordinates indexed in the Sloan Digital Sky Survey (SDSS)and confirmed that the artifacts were associated with BL QSOs. Further analysisof the QSOs, moreover, demonstrated they exhibited prominent broad emissionlines such as CIII and MgII, which are characteristic of Type 1 BL quasars. Itis our interpretation, therefore, that the radial spokes characterized asartifacts by LOFAR were produced by the emission of Type 1 BL quasars in theline of sight of the radio telescope.

Low Frequency Two Meter Sky Survey Radial Artifacts Identified as BL Quasars