Pixel size is fixed in angular size. Can be input or output. The sky plane Y pixel coordinate. See the CXC Coordinates papers for definitions. Gives position on the tangent plane to the nominal celestial pointing direction.
Pixel size is fixed in angular size.
Can be input or output. If you took the event list and binned by a factor of 32, say, then original sky pixels 1 to 8192 correspond to logical pixels 1 to 256. Can be input or output. If you took the event list and binned by a factor of 32, say, then original sky pixels 1 to 8192 correspond to logical pixels 1 to 256. Can be input or output.