SIMBAD query result

Please have a look at the "Dictionary of Nomenclature"

Result of query: info cati CXOU J124342.2+113335

.

 [Class]      Acronym  (Explanation)   . . . . . . . . . in Simbad, use:
 [X]          CXOU (Chandra X-ray Observatory Unregistered)  CXOU JHHMMSS.s+DDMMSS
 [X]          CXU (Chandra X-ray Unregistered) . . . . . CXOU JHHMMSS.s+DDMMSS