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.
Cite
@article{arxiv.1401.5987,
title = {3C 273 - half a century later},
author = {L. Slavcheva-Mihova and B. Mihov and I. Iliev},
journal= {arXiv preprint arXiv:1401.5987},
year = {2014}
}