Solving problems?
So! First thing in the morning, talked to Piero Rosati (ESO) about the FORS2/MXU preimaging preparation and so on.ÂAt the end there is no recipe, but his experience in the topic tells that the OFFSET=wcs IMCOMBINED frame must work (after all that's what the manual says and several people should have used that without problems), or we could reduce the image, anyway we want and then put the original image header (as long as the objects are in the same pixels), as I did for the preparation of our last run in december.
Joining this with some of Marina Rejkuba's suggestions, the approach I took was shift two of the images to the central one and combine them with no offsets. Comparing the headers, they are the same, just minor changes that IRAF does when processes the images. Nothing changed on the pixel information or on WCS information. So it must work.
Recipe for preimaging reduction for FORS2/MXU
- fsmosaic the individual frames (that come debiased and flatfielded)
- shift them to the central one (using imshift, imalign, ... whatever you like, as long as the header information is maintained)
- combine them with IMCOMBINE (I know it maintains the header information)
and it's done!
Then, after lunch I had a express course with Bodo Ziegler about the mask preparation with FIMS and it's caveats (he's one of the experts on that).
Then I spent most of the day preparing the catalogues and priorities for the mask preparation (which has to be done under linux, even though Piero commented that Marco Lombardi modified to run under MacOSX, of course I'll be contacting him soon enough).
Also finished matching literature and my catalogue for one of the clusters, but done as buffer flushing while preparing the catalogues for the masks.
Also some improvement on the KG code, but not much.
The final touch was receiving a confirmation e-mail that the GMOS mask has arrived in Chile and that we needed to change something or if the program could be activated. So activated it is!
Tomorrow, mask preparation!!!
Labels: eso_preimaging, hcg_ucd, hi-z morph, kg
posted by Cris Da Rocha @ 10:54 PM
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