My Great grandmother's sister...

Hello! I am looking for my great grandmother sister, whom I belive has emigrated to USA. I have found her on a list subscribed in the 1960's where she is supposedly emigrated from Norway in 1883. There are however no records of her, where she went, what ship she was on... So I thought maybe you could help me? the information about her: Her name was Johanne Marie Andreasdatter ( Andreasen) She was brought up in Skjeberg on a place called Skyttebraaten ( Skyttebråten). She was born in 1858, and on the list I found her in, she had given her age as 25. She had several siblings, including my great grandmother. Johanne Marie was a child born outside of marrige, but I don't know if this is relevant. Her mother's name was Julie(Juliane Josephine)Andreasdatter ( Jensen) I am sorry .. but she wrote it in many different ways. Her mother was born ca 1837. And she was born in Skjeberg. Her father's name was Andreas Johansen ( Johannesen). Skjeberg is in the southeastern part of Norway. And he was born ca 1831. I don't know if she was married or if she had any children when she left. The list I found was a transcription of emigrateprotcol, and a list where everybody from Østfold had emigrated. I strongly think that she really emigrated, because I can't find her in any record here in Norway. And I have tried the net, but so far found nothing. If you can't help me, I would like to know if there are any other ways to find her. Best regards Torunn Cathrine