| | | | | | |
| | |||||
|
Q:The X-ray image of Orion Nebula seems to have a large cross in its center, as if it was formed by 4 quadrants. Why is that?A:
The cross in the image is an instrumental artifact due to the
arrangement of the CCD chips in the imaging array of the ACIS
detector. See http://chandra.harvard.edu/about/science_instruments2.html
Some images do not show this effect because the image is
entirely on one chip. |
||||||||||
Revised: August 02, 2005
|
||||||||
