X-ray blazars without 4FGL-DR4 counterpart

We present the results of a multi-wavelength study of blazars selected from the 5th ROMABZCAT catalog. We selected from this sample a subsample of 2435 objects having at least...我们呈现了从第五版ROMABZCAT星表中选取的耀变体（blazars）的多波段研究结果。我们从该样本中筛选出2435个至少具备……的天体，组成其子样本。