Application to public HSC DR3 as proof of concept

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From FY24 Q1 QU

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08/FEB/23

• uses the independent code from Develop and implement systematics mapping and linear deprojection functionality in TXPipe. #13 to do this.

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07/MAR/24

• with independent code have started looking at this but still to do with TxPipe as per Develop and implement systematics mapping and linear deprojection functionality in TXPipe. #13

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25/MAR/24

• template deprojection applied to HSC and obtained power spectra
• memory issues are blocking systematics so these are being investigated further
• Note this does not affect delivery of D3.8.2.1 PR ie. D3.8.2.1 Standard contaminant mapping and cleaning methods (Oxford) #1

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08/APR/24

• O/G

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30/APR/24

• discussed memory issues and possible solns at DESC telcon recently
• PCA looks to be a way to deal with this so will investigate
• also running a prelim analysis at lower resoln for paper
• will then proceed from there

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14/MAY/24

• have power spectra for all 3 fields.
• Now need analysis with all relevant systematics deprojected
• Note that this ticket was removed from the D3.8.2.1 Epic ( Develop and implement systematics mapping and linear deprojection functionality in TXPipe. #13) since it was not part of the resulting PR
• this task will however be validating the outputs of D3.8.2.1 ( Develop and implement systematics mapping and linear deprojection functionality in TXPipe. #13) hence the blocking dependency was added

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04/JUN/24

• looking at power spectra at low res due to scalability struggles
• have signals where not expecting to be so investigating possible sources eg. could be survey mask so will ask WLSS
• https://docs.google.com/presentation/d/1lWDdQnFzkEQTd0ZqMDAmKaWi9I4osyuD/edit#slide=id.p1
• https://docs.google.com/document/d/1xYt89XlkRJYiJNYvRW5qaOsi7QXY6er4ZLzXTfkE144/edit#heading=h.omuouqr670cc

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01/JUL/24

• still looking at the above mentioned signal issues.
• identified possible sources but as yet not been able to mitigate
• sky mask has generated some unwanted cross-correlations
• suspect HSC pipeline is missing an item so this will be looked into
• this will be helpful for DESC regardless

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29/JUL/24

• have identified the source of the unwanted cross-correlations
• this is due to cuts in the data at the download stage
• now redoing without the cuts to see what the effect is
• looks likely that this is dealing with the issue so probably no need for simulated data after all

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20/AUG/24

• the above approach was successful.
• now have a means to get accurate power spectra
• implementing this as python script
• no need to establish if this needs to incorporate into TxPipe (see Google doc for the masks and the responsibilities -Boris will check)
• next step is to produce first final power spectra

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12/SEP/24

• believe have accurate power spectra
• now using these to derive constraints on the distribution model
• also look at improving the linear deprojection method eg. remove assumptions and deal with memory issues

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01/OCT/24

• now have code for fitting basic halo distribution model. This gives preliminary result
• Next stage is to improve this values
• 3rd pt above still o/g

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21/OCT/24

• halo distributions: rerunning to identify issues

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13/NOV/24

• still having issues with the halos, getting poor fits.
• continued testing with HSC DR1
• still investigating these
• but note the pipeline itself is ok for the purposes of LSST:UK so the final step will be to confirm power spectra from the pipeline are realistic from HSC DR1

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11/DEC/24

• found halo model that works with HSC DR3
• so will keep DR1 in reserve instead
• the final step will however still be to confirm power spectra from the pipeline are realistic from HSC DR1. This will be a sanity check