I drew the blue vertical line at 20 km/s: https://image.ibb.co/m38AH7/galaxy.png https://image.ibb.co/m38AH7/galaxy.png Are you claiming this is cutting off 1e

I drew the blue vertical line at 20 km/s: https://image.ibb.co/m38AH7/galaxy.png https://image.ibb.co/m38AH7/galaxy.png Are you claiming this is cutting off 1e-5 of the area of that Gaussian curve they fit? It looks very close to 1/20 to me. I don't care about .05, just to get an order of magnitude and compare it to the "this is an unbelievable result" quotes.