Sibylle Bergemann was born in 1941 and was a well known photographer in the GDR and in the reunified Germany. Her pictures were published in the GDR fashion magazin Sibylle, in the magazin Magazin and were shown in several exhibitions. In 1990 she was one of the co-founders of the famous photographers agency Ostkreuz. Since 1994, she was a member of the renowned Akademie der Künste.
It is a littlebit difficult, to find information about Sibylle Bergemann in English, but I hope that the following links will do.
Here you will find a resume of Sibylle Bergemann in English.
You will find more information about her on photography-now.com.
Google Image Search will give you an impression of her work.
The team of the DDR Museum expresses it`s condolences to all her relatives and friends.