SIMBAD query result

Please have a look at the "Dictionary of Nomenclature"

Result of query: info cati MHC2003] GB 021004 abs 2.328

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 [Class]      Acronym  (Explanation)   . . . . . . . . . in Simbad, use:
 [Absorber]   [MHC2003] (Mirabal+Halpern+Chornock+ 2003)  [MHC2003] {GRB 021004 abs} N.NNN