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nrnapolita / KIWI_LSST

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2DPHOT run on LSST and Shanghai simulation #4

Open nrnapolita opened 6 years ago

nrnapolita commented 6 years ago

Nivya and Angela check the way to use Galfit/GALAPAGOS on LSST images NRN checks the documentation for the GalSim catalogs

nrnapolita commented 6 years ago

NRN has to retrive the saturation and gain

KiaraSpin commented 6 years ago

GM 18/12: Nyvia got the right values for GAIN and SATURATE and is now trying to make a 1-to-1 comparison between 2DPHOT and LSST. Still problem in matching the results or at least to gather the right info from LSST.

Nivya: I did 2dphot run with new gain and saturation values. Attach here is a file with comparison between LSST input parameter and 2dphot output. The results are not good. Anyway as examples I add some output plots from 2dphot along with the source and residual fits stamps

KiaraSpin commented 6 years ago

AI: Nivya has to find "size" information in the LSST catalog.

KiaraSpin commented 6 years ago

Group Meeting 15/01/18 We need to give feedback to the LSST team. DES is preparing the new simulation which should be more realistic and complicated. We should report if there is something wrong in the way the "make galaxies".

Nyvia managed to run 2DPHOT on LSST simulations but these are really simplistic simulations which consider only single Sersic galaxies (with n=1 OR n=4). The scatter we found was huge: e.g. galaxies with n=1 turned out to have n=>4. This means that we could not recover "morphology" using only Sersic. Is there something we are doing wrong with 2DPHOT? Right now we cannot really assess how simplistic/realistic these simulations are. We can try to run GALFIT. For the moment it crash for Nyvia... -> AI Angela: try to follow up on this. Try to make GALFIT work (on KiDS first, then eventually also on LSST)
At the moment we hold on this and see how does it go with GALFIT.

KiaraSpin commented 6 years ago

GM 29/01 Still work in progress (problems running GALFIT on Thor).
GOOD NEWS: Visitors from China have simulations that they used to do weak lensing. They have galaxies with multicomponent Sérsic. They are willing to share with us their simulation. Nicola will keep contact with them and report on it.

KiaraSpin commented 6 years ago

GM 26/02 NO news about this. ON HOLD for the moment

KiaraSpin commented 6 years ago

GM 16/04 Shanghai Simulations: @MariaAngelaRaj is working on it. She needs to edit the code to skip some steps in the 2DPHOT process (input: stamps + PSF).

KiaraSpin commented 6 years ago

GM 02/07 This task has been moved to Francesco, while Angela will focus more on FDS.

nrnapolita commented 5 years ago

I have lately had a mail exchange with Diego Tuccillo and it seems we are starting this task again. More soon