LF is looking weird... - Githubissues

charlottenosam / Pangloss

Line of sight mass reconstruction in the Universe

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LF is looking weird... #23

Closed charlottenosam closed 10 years ago

charlottenosam commented 10 years ago

Tests:

[x] Compare the mean weak magnification of each field with dropouts and their brightness
- Doesn't look like there's any correlation...
[x] Plot distribution of velocity dispersion for the whole sample - is it skewed to low-sigma? ???????????????????
- This includes objects with no measured mag: mag=99 excluded
- Only a problem for z<1: low z and low mag
- [x] are the magnitudes correct?
- [x] Is the fit off?
- I was using log(z) not log(1+z)....
- Now it looks like this:
[x] Label strong lensing with details about the dropout

charlottenosam commented 10 years ago

Tommaso says:

[x] Fix the mag - sigma relation as Faber-Jackson
[x] Only fit for galaxies sigma > 200 km/s --> log = 2.3

charlottenosam commented 10 years ago

[x] Are L_obs and L_true the wrong way round? This doesn't help

charlottenosam commented 10 years ago

New lead: I didn't remove 1815-3244 (the starry field) from overdensity calculations - all densities are skewed so the mean overdensity and mean mu for all field != 1...!!!

[x] Recalculated overdensities
[x] Recalculated pdfs
[ ] Fit pdfs with double gaussian
[ ] Run LF code

charlottenosam commented 10 years ago

It was the integration limits - old code just integrated Gaussian around the centre of Lobs, but we need to integrate around Lobs/mu_mean