3C 273 - half a century later
classification
🌌 astro-ph.HE
keywords
monitoringavailablecalibrationscenturycomparisoncompileddiscoveredfacilitate
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We have presented an optical monitoring of 3C 273, the first quasar discovered fifty years ago. It does not show variability both on intra-night and long-term time scales. To facilitate the further monitoring of 3C 273, we compiled the available calibrations of the comparison stars in its field into a mean sequence.
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