I'm guessing it is RTTY45, PSK31, or MFSK16 (gathered from this wiki page W1AW - Wikipedia, the free encyclopedia ) but just wanted to verify? Thanks in advance.
With an outside antenna you are likely to hear RTTY between 28.070 and 28.150 MHz. The contest runs until 2400 UTC Sunday evening, but even with no contest you'll hear RTTY on the band when propagation is enhanced from either sporadic E or F2 skip.