Van Gogh did paintings that were remarkably mysterious, artistic, compelling, unique and fascinating. He is World famous. Today there are photos taken with many different types of cameras that the photographer can run through photo programs that do some interesting Van Gogh like techniques. Also there are Raintings (see right here on Urban Dictionary for their definition) that don't use a photo program, only rain water or drops on a windshield between the camera and the subject. It would be a dishonor to say these artful photos are Van Gogh's, but they are artistic.
Van Goghtographs never purport to be like a Van Gogh painting nor to actually be a Van Gogh. They might make their viewers mindful of Van Gogh, and contain influence from his works, but Van Gogh is attached to the word photograph in a playful way, not to cheat nor forge, but to pay respect & homage to a famous artist.