| | 3 | == Example restoration: 2014-04-03 == |
| | 4 | |
| | 5 | [[Image(m33_backgrounds.jpg,800px)]] |
| | 6 | |
| | 7 | An implementation of the method described below is in place, with the results shown above for M33 (from the LAP.ThreePi.20130717 processing, explaining some of the improved masking relative to the set below. Displayed above are the results in all five filters (sorted alphabetically instead of by wavelength) with the composite background model on top, the restored image in the middle, and the original stack image on the bottom. |
| | 8 | |
| | 9 | All models used the same OTA dependent models, derived from the SAS g-band data. This was chosen to ensure the models would not be contaminated with excessive noise, and to minimize the effect of uneven sky levels between exposures. |
| | 10 | |
| | 11 | The gri results look promising, although there are some bad samples in the r filter. This is even more pronounced in the the y and z filters, creating some checkerboard patterns. These features tend to cluster near the edge of the image, as the current implementation does not sample outside of the stack field of view, resulting in more dramatic ramps. |
