I don't know if this is a general topic or applicable to only some airlines, so I am posting it here.

I just booked a one-way flight BOM-IST on Turkish Airlines (award ticket using United miles). When I got the e-mail confirmation, it said "operated by Jet Airways". I thought this was strange, because I normally check these things rather diligently, and I did not see any mention of this when booking.

Luckily, I still had the booking tab open on my browser. I went back to look at it, and it said "operated by 9W for Turkish Airlines". 9W is, of course, the code for Jet Airways.

I'm not really clear on this flight. What does "for Turkish Airlines" mean? Is it a codeshare, or something else? Is the plane going to say Turkish Airlines or Jet Airways? Who do I check in with?