| | 8 | I spent much of the week working on the missing fields from the psphotStack output that are needed by PSPS. I added the ability to write out the full set of covariances for all model parameters, and a few other fields (petrosian fill factors, fix the error values in the petrosian analysis, added standard deviations to the radial aperture fluxes). I also created a better test suite of this stuff which helped fix an error in the radial aperture flux calculations. I also added the radial aperture fluxes to the single-image version of psphot (previously it was only available in the psphotStack version). I generated a test sample for MD04, using 8 sets of raw exposures and running to the stack creation. I will be running psphotStack on this set to produce output for PSPS to test. |
| | 9 | |
| | 10 | I also re-ran the astrometry and photometry analysis on the full-sky DVO reference database. The photometry analysis had been running very slowly, and I traced that to an image-map optimisation which I had added to relastro but forgot to port to relphot. When that was done, the full-sky relative photometry took about 30 hours to run. I had also finished the relative astrometry analysis, but discovered that an important config table defining the relative weights of PS1 and 2MASS detections was wrong (credit to Roger Lin for pushing that). I re-ran relastro as well, and that took about 24 hours as well. I have also run the relative photometry analysis on the MD field database. At this point, I need to assess the results of the calibration analysis, and merge the MD and 3pi zero point analysis (using the program 'uniphot'). |
| | 11 | |
| | 12 | I spent some time looking into diffraction spikes and glints. Inspired by results from MOPS, I looking at the quality of our diffraction spike masking. I realised that the masks were sometimes a small amount off in rotation, and for very bright stars, this could lead to significant misses. I asked Chris to look into improving the model. At John Tonry's urging, I examined the positions of some stars causing a particularly nasty glint. This appears to come from part of the L3 support structure, and John believes he can shadow it with a better top mask. |
| | 13 | |
