By Dana Rose Falcone
Updated May 12, 2015 at 02:48 PM EDT
Peter Macdiarmid/Getty Images

Former glam rock singer Gary Glitter has launched an appeal to overturn the sex abuse convictions he received in February, the Court of Appeal reports. The Southwark Crown Court sentenced Glitter to 16 years in jail after he was found guilty of attempted rape, four counts of indecent assault and having sex with a girl under 13.

It is unknown at this time how many or which specific counts the 71-year-old singer seeks to challenge.

In February, Judge Alistair McCreath told Glitter, whose real name is Paul Gadd, that his victims were “profoundly affected” by his wrongdoing, and that Glitter never truly atoned for the acts. McCreath gave Glitter the maximum sentence permitted based on the time the offenses occurred.

A date for the appeal hearing has not yet been scheduled.