Determine if the reads in a .fasta file of a bacteria contains plasmid

Question

[suzuBell]

I have the reads in a .fasta file for a bacterial strain. I was able to assemble these reads into contigs and determine the size (bp) and GC% of all this information.

1. Does this size and GC% represent chromosome and plasmid parts combined? If so, how do I separate chromosome information and plasmid information?

2. I would like to determine whether or not this .fasta file contains plasmid(s), or if it is entirely chromosome data. If plamids are present, I would like to know the number and each of their size (bp) and GC%. How can this be achieved?

Thank you for any guidance you may provide.

[GenoMax]

How many contigs are there and have you tried to blast some of the smaller ones to see if they hit a plasmid?