BRIEF-RESEARCH ALERT-Citigroup raises Afren, Cairn Energy to buy

Jan 11 (Reuters) - European E&Ps:

* Citigroup raises Afren Plc to buy from hold

* Citigroup raises Cairn Energy PLC to buy from hold

* Citigroup raises Dana Petroleum PLC price target to 1655P from 1505P;

keeps buy rating

* Citigroup raises Soco International PLC to hold from sell

* Citigroup raises Tullow Oil PLC price target to 1365P from 1295P;

keeps hold rating

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