Preliminary results on direct photon-photon HBT measurements in "S IND.NN" POT. 1/2" = 62.4 GeV and 200 GeV Au + Au collisions at RHIC - Das, Debasish; Lin, Gouji; Chattopadhyay, Subhasis; Chikanian, Alexei; Finch, Evan; Nayak, Tapan K; Panitkin, Sergey Y; Sandweiss, Jack; Suaide, Alexandre Alarcon do Passo; Zhang, Haibin (Nukleonika, 2006)