Yes, there are two contests.
The first one will run through deviantart. All details can be found here. The entries must be submitted through that website with a link to the contest journal provided in the deviation.
The second contest is run through tumblr, for those that do not have a deviantart. Last year my contest was only on deviantart, but since then the fanbase of the story has expanded and it would be unfair to leave anyone out of a chance to win. All details for the tumblr contest can be found here, and the entries are accepted on tumblr, fanfiction.net, and archive of our own.
Each contest has the same grand prize, and if three writing entries and three art entries are received for either, that contest will have two grand prizes, one for each category.
You can enter into both contests, but you must have a different entry for each. All art mediums welcome, so long as it relates to Brothers Apart or any of its AU’s!