| 221 | | Static sky (stack) photometry and recalibration (skycal) is run on refstacks, deepstacks and night stacks. In trying to run as a uniform group, will keep a summary of info here, but details like specific faults, poor quality etc will be in the respective MD section. For example some skycells can have a clear offset fix to the zeropoint, not actually set to 25.0 in stack pixels, sometimes the majority of the field is off from zeropoint of 25. There appears to be upwards of 3-5% error likely in the photometry across the FPA (see [wiki:MD.GR0#MD09.GR0]) even in the recalibration of the stack photometry (skycal stage). A much worse example is seen in [wiki:MD01.refstack.20120803]. |
| | 221 | Static sky (stack) photometry and recalibration (skycal) is run on refstacks, deepstacks and night stacks. In trying to run as a uniform group, will keep a summary of info here, but details like specific faults, poor quality etc will be in the respective MD section. For example some skycells can have a clear offset fix to the zeropoint, not actually set to 25.0 in stack pixels, for some the majority of the field is off from zeropoint of 25. '''There appears to be upwards of 3-5% error likely in the photometry across the FPA''' (see [wiki:MD.GR0#MD09.GR0]) even in the recalibration of the stack photometry (skycal stage). A much worse example is seen in [wiki:MD01.refstack.20120803]. |
