Looks like Poa annua. Probably too late for this year with the Bermuda already growing, but a pre-emergent next year will help. It will die out for the year when the weather gets hot.
Poa annua. Best method is to use a pre-emergent twice yearly to prevent it from germinating.
I have had success with using the herbicide Image. 90 degree days will kill it too, but thousands of seed will be generated by that time.
Its poaanna you can spray it with negate 37wg. You can spray it now it will die. The hotter it gets if you don't spray will also die out. Definitely get on a pre-emergent schedule. It was a bad year for it. Prodiamine is a good pre-emergent spectral is alot better.