[ml/nj]

120 ripples in the resulting image

Teach me.

WTF are ripples?

Is this image you are talking about a simple time lapse image acquired over the 53 hours; or is it more like a race track photo finish image?

ML/NJ

[spunkets]

The image has 5-6 ripples, so the velocity of the ejecta/sound is ~0.05c. ...5% of the speed of light by grosss averaging. Here's a tech's image indicating the density peaks taken from the second image. Images from the linked article...

Caption:"The Chandra data show sound waves rippling through hot gas that fills the Perseus cluster. The features were discovered by using a special image-processing technique to bring out subtle changes in brightness."

"Is this image you are talking about a simple time lapse image acquired over the 53 hours; or is it more like a race track photo finish image?"

53hr shutter speed on an object ~250Mly away...

[spunkets]

Even though the shutter speed is 53hrs, there is no motion to be observed. The time lapse is needed to gather spacial info. 2.5Byrs of event is contained in that still.