Ramadhaan & Fasting

Qadhi announcing Eid

Q: If a person is going on jamaat to an Arab country for ramadan and eid, and in that country they use scientific methods to determine the date of eid without actually seeing the moon, should one celebrate eid with them? If not, should one look for the moon and if not seen, fast on their eid and celebrate eid the next day?

Fasting without sehri

Q: My question is a night before Rajab (miraaj un nabi) I made intention of fasting keeping roza. I stayed up a little with some ibaadat so I thought I will take a hours rest an then get up for sehri but I didn't realise I fell asleep and woke up next morning. Can you please tell me if I am gunaghaar an will my fast be accepted? Can I carry on fasting during the day or not?