coworker sleeping on the job 🙄

Someone tell me what the F to do?? We work at a response center and monitor alerts and alarms. She is sleeping! There are only 2 folks on a shift at a time. I'm covering all her shyt because she will not stay up! I've tried talking to her and she ignores me. I've taken photos of her sleeping. Do I go straight to my superior about this? I've tried with her several