| 170 | | * As deep as possible.. maximum FWHM allowance? minimum exposure time? specific request for at least ~10ks has been requested, with best FWHM possible and also a fairly balanced dither set.. |
| 171 | | |
| 172 | | See summary for each MD field reference stack for details on specifics for that field. Due to processing+time constraints/early mistakes, an attempt has been made to merge the similar criteria under the ''refstack'' label. |
| 173 | | |
| 174 | | Since magic destreaking uses the convolved stack, looking into a quickstack version of the unconvolved stacks for the transients reference and deep stack that will be faster to make with more inputs. |
| 175 | | |
| 176 | | For cases when a stack does not have a good sample of exposures with a reasonably small PSF FWHM, it should be possible to generate a reference stack with the fewer 'best' exposures for just SSdiffs and transient detection. MD02-g may be such a case. |
| 177 | | |
| 178 | | For fields with shifted centers from offset earlier exposures, inclusion of enough exposures to provide a reference stack for magic is necessary in order for data from those associated chips/skycells to be distributed (being older data, may not have the optimum quality). Mixing older and newer data may also be a detriment. |
| 179 | | |
| 180 | | Related to deep stacks, there needs to be enough inputs to obtain minimum depth that is as pixel contiguous as possible (see MD04 deep stack tests). |
| 181 | | |
| 182 | | How much of a varying IQ can go into a stack before ppSub has difficulty modeling the variations within a skycell? |
| 183 | | |
| 184 | | Deep stacks on hold until finish investigating overly large PSF in the convolved stacks dependent on the number of input warps. |
| 185 | | |
| 186 | | Without need for magic for releasing older data, should focus on more recent data going into the refstacks |
| | 170 | * As deep as possible. A maximum FWHM allowance? A minimum exposure time? |
| | 171 | * A specific request for at least ~10ks has been made, with best FWHM possible. |
| | 172 | * A fairly balanced dither set is almost by default with a large number of inputs |
| | 173 | |
| | 174 | See summary for each MD field reference stack for details on specifics for that field. Due to processing+time constraints/early mistakes, an attempt has been made to merge the similar criteria under the ''refstack'' label -- full field coverage, best FWHM, 1-1.5 mag and >10ks depth over central FPA as possible |
| | 175 | * based on the steep edge on the FWHM distribution of input warps, a large number of inputs could be used without degrading the final FWHM by much (~0.2 pixels, ~0.05") even upwards of 150 input warps |
| | 176 | * of order 100 inputs found necessary to keep a minimal depth per pixel in many central regions with the dither and masking (see MD04 deep stack tests). |
| | 177 | |
| | 178 | |
| | 179 | Additional considerations: |
| | 180 | * since magic destreaking uses the convolved stack, a quickstack version of the unconvolved stacks for the transients reference and deep stack could be faster to make with a larger number of inputs but requires additional development for regular processing. |
| | 181 | * fields with shifted centers with offsets to include early exposures, the inclusion of enough exposures to provide a reference stack for magic is necessary in order for data from those associated chips/skycells to be distributed (being older data, may not have the optimum quality). Mixing older and newer data may also have other problems. |
| | 182 | * for cases when a stack does not have a good sample of exposures with a reasonably small PSF FWHM, it should be possible to generate a reference stack with the fewer 'best' exposures for just SSdiffs and transient detection. MD02-g may be such a case, but could leave large regions of order a night stack number of inputs. |
| | 183 | * how much of an IQ variation can go into a stack before ppSub has difficulty modeling the variations within a skycell? |
| | 184 | |
| | 185 | |
| | 186 | Deep stacks on hold until a solution is found to the overly large PSF made in the convolved stacks that is dependent on the number of input warps -- fixed, but other issues found and development necessary before full deepstack set is run on all fields. |
| | 187 | |
