收到一份哥大教授套辞信

突然收到一个哥大教授的邮件，开头这么写的：I was looking through your application and the materials indicated that you may be interested in doing research as part of your masters degree at Columbia. 然而我并没有收到过哥大的AD啊？是这位教授发邮件时眼瞎了，还是说我马上要收到ad了？
已经收到哥大ad的同学们看看这是怎么一回事啊？

补充内容 (2016-4-15 11:58):
补充一下后来的情况，攒攒rp～

8号收到邮件要求重交一份PS， 14号就收到 admission notification email~