Abstract
Following the report of the disappearance of the radio pulsation and enhanced gamma-ray emission of the binary millisecond pulsar PSR J1023+0038 (ATel #5513), we search for the available Swift X-ray Telescope (XRT) observations in public archive. PSR J1023+0038 has been observed on 2013 June 10, 12 and October 18. The exposure times for the first two observations are less than 2 ks while the last observation has an exposure time of ~10 ks.