SIMBAD query result

Please have a look at the "Dictionary of Nomenclature"

Result of query: info cati CXOGSG J225711.3-362734

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 [Class]      Acronym  (Explanation)   . . . . . . . . . in Simbad, use:
 [(X)]        CXOGSG (sources named by Galaxy Structure Group (NAOC) using Chandra X-ray Observatory data) =E=
                                                         CXOGSG JHHMMSS.s+DDMMSS
=E= indicates catalogues available in electronic form at CDS