Zhou Qing-Yong, Wei Zi-Qing, Jiang Kun, Deng Lou-Lou, Liu Si-Wei, Ji Jian-Feng, Ren Hong-Fei, Wang Yi-Di, Ma Gao-Feng. A method of calibrating effective area of focusing X-ray detector by using normal spectrum of Crab pulsarJ. Acta Physica Sinica, 2018, 67(5): 050701. DOI: 10.7498/aps.67.20172352