| |
 |
| Paper: |
ACIS Sub-Pixel Resolution: Improvement in Point Source Detection |
| Volume: |
442, Astronomical Data Analysis Software and Systems XX (ADASSXX) |
| Page: |
139 |
| Authors: |
Anderson, C. S.; Mossman, A. E.; Kim, D.-W.; Allen, G. E.; Glotfelty, K. J.; Fabbiano, G. |
| Abstract: |
We investigate how to achieve the best possible ACIS spatial resolution by binning in ACIS sub-pixel
and applying an event repositioning algorithm after removing pixel-randomization from the pipeline data.
We quantitatively assess the improvement in spatial resolution by (1) measuring point source sizes and
(2) detecting faint point sources. The size of a bright (but no pile-up), on-axis point source can be
reduced by 20–30%. With the improved resolution, we detect ∼20% more faint sources when embedded in the
extended, diffuse emission in a crowded field. We further discuss the false source rate of ∼10% among
the newly detected sources, using a few ultra-deep observations. |
|
|
|
|
|
