Junhui+Fan

We determined the central black hole masses (//M//) for 25 //γ//-ray-loud blazers using their available variability timescales. We found that the black hole masses range between 107 //M// //⊙ // and 109 //M// //⊙ //. For the black hole mass there is no clear difference between BLs and FSRQs, which suggests that the central black hole masses do not play an important role in the evolutionary sequence of blazars or there is no evolution between BLs and FSRQs.
 * Supermassive central black hole masses in blazars ** ** J. H. Fan J.Li, Y. X. Wang, J. H. Yang, J.S. Zhang **