| | 1 | The MOPS team have obtained a set of Megacam images roughly reproducing the behavior of PS1 during the sweet-spot survey. There are 441 science images, already processed by Elixir at CFHT. The goal of this experiment is to run these images through the IPP, accepting the detrend processing already performed. We will run photometry and astrometry on the images, push them into a dvo database, then continue with warping, stacking, and difference images. |
| | 2 | |
| | 3 | Paul downloaded the images (*.fz), and uncompressed them as SPLIT. He also injected and registered them. However, since we have substantially modified the db schema, it is necessary to re-inject and re-register. Also, I would prefer to limit the clutter somewhat. |
| | 4 | |
| | 5 | The following steps are performed in the path://MOPS directory (/data/ipp003.0/MOPS). |
| | 6 | |
| | 7 | I have re-uncompressed the images as MEF: |
| | 8 | |
| | 9 | foreach f (CFHT/completed/*.fz) |
| | 10 | set g = `echo $f | sed "s|CFHT/completed|raw|" | sed s/.fz//` |
| | 11 | echo $f to $g |
| | 12 | imcopy $f $g |
| | 13 | end |
| | 14 | |
| | 15 | I have re-created the mops db: |
| | 16 | |
| | 17 | pxadmin -dbname mops -create |
| | 18 | |
| | 19 | I have injected the images into the db: |
| | 20 | |
| | 21 | ipp_serial_inject.pl --telescope CFHT --camera Megacam --workdir path://MOPS/proc --dbname mops raw/*.fits |
| | 22 | |
| | 23 | == Notes by EAM on the output from the warp / diff / stack run == |
| | 24 | |
| | 25 | * I used by mana gauss function (aperture photometry + 2nd moments) to compare a few stars in the input and output images. |
| | 26 | |
| | 27 | three stars from the input image: |
| | 28 | 1997.814666 3393.678207 4.986096 4.279504 195.687501 121569.912408 -12.712065 0.002991 |
| | 29 | 2013.103345 3458.171819 4.926861 4.264878 195.229259 125079.747430 -12.742967 0.002969 |
| | 30 | 1861.267202 3550.219778 5.091351 4.305773 201.644630 155955.277161 -12.982500 0.002667 |
| | 31 | |
| | 32 | same stars in the output (pswarp) image: |
| | 33 | 2421.307269 2863.529857 4.784802 4.105228 190.425317 106709.732417 -12.570510 0.003126 |
| | 34 | 2409.429668 2924.210163 4.828819 4.113553 190.834548 110456.602975 -12.607979 0.003066 |
| | 35 | 2553.875313 3004.812263 4.863171 4.164788 195.411010 137301.346736 -12.844187 0.002777 |
| | 36 | |
| | 37 | dm = -0.1386 +/ 0.0007 (not sure where 0.138 mag offset comes from. pixel scale change?) |
| | 38 | |
| | 39 | * I believe the discrepancy in the residuals seen in the band of higher noise is caused by the psf variations. test this by running the stack that only includes the images in this band. |
