Today I was finalizing making update figures for the DLSCL J0916.2+2953 letter and one of the details had to do with adding peak error bars to the weak lensing mass maps. First I estimate the peak using an analysis that takes advantage of all the observed galaxies. Then to estimate the variance I use weak lensing maps that are the product of a bootstrap sample of the observed galaxies. Taking extraction regions around each subcluster I then measure the distribution of peaks in the bootstrap sample. See the screen capture from my research note book (side note: I highly recommend Microsoft OneNote).
 |
| Weak Lensing Peak Variance Estimate Notes |
This gives me a distribution in each peaks RA and Dec. For example the y-pixel coordinate of the Subaru weak lensing southern peak is shown below. The dashed lines represent the 1 sigma deviations and the blue and red lines are just different statistics.
Finally this information is plotted on the weak lensing mass map as blue cross-hairs.
No comments:
Post a Comment