Bowtie output file format

[questioner]

Hello,

While running Bowtie, I got the following output (first 4 reads). In the Bowtie manual, it mentioned that the output file should have 8 columns. Now I see 15 columns. Does anyone know what each column stand for? Specifically I don't understand the meaning of middle columns.

Thanks in advance!

FC20B5RA_20080331:1:272:734:601 gi|224384767|gb|CM000664.1| 10213 - 0 0 51 51 51 1 48 0 1 28 CCCTAACCCTAACCCTAACCCTAACCCC KKQQ[Y[XQX[[[[[[[[[[[[[X[[[[

FC20B5RA_20080331:1:6:60:730 gi|224384767|gb|CM000664.1| 10219 - 0 0 51 51 51 1 58 0 1 28 CCCTAACCCTAACCCTAACCCTTAACCC YYYF[Y[[[[[[[[[[[[[[[[[[[[[[

FC20B5RA_20080331:1:27:927:651 gi|224384767|gb|CM000664.1| 10221 - 0 0 76 76 76 0 0 1 0 28 CTAACCCTAACCCTAACCCCTAACCCTA YWY[[[[[[[[[[[[[[[[[[[[[[[[[

FC20B5RA_20080331:1:2:472:953 gi|224384767|gb|CM000664.1| 10414 - 0 0 51 51 51 1 58 0 1 28 AACCCCAACCCAAACCCCAACCCCAACC YYYYYYYY[[W[[[[[[[[[[[[[[N[[