| 8 | | This week, we've been continuing to push new data through the system, and have been working on some older data as well, including older M31 multicolor data from Fall 2008. Heather ran into some trouble with astrometry on these fields, and at the same time on some of the newer Medium Deep fields. I spent some time understanding what was happening. It turns out these are unrelated issues: the newer data was failing because out reference database was partially missing -- when it was moved to its current location, some of the directories were missed. It looks like the older data has a different problem, and I have not yet identified the cause (either the model is out of sync on a change in the pointing model, or the pointing was intrinsically so much worse in that period that the guess we are using is way off). |
| | 8 | This week, we've been continuing to push Run 3 and new Run 4 data through the system, and have been working on some older data as well, including older M31 multicolor data from Fall 2008. Heather ran into some trouble with astrometry on these fields, and at the same time on some of the newer Medium Deep fields. I spent some time understanding what was happening. It turns out these are unrelated issues: the newer data was failing because out reference database was partially missing -- when it was moved to its current location, some of the directories were missed. It looks like the older data has a different problem, and I have not yet identified the cause (either the model is out of sync on a change in the pointing model, or the pointing was intrinsically so much worse in that period that the guess we are using is way off). |
