[PIPE2D-671] Analyze Subaru images and create a 2d PSF solution - same illumination at all values of defocus Created: 08/Dec/20  Updated: 29/Jan/22  Resolved: 18/Mar/21

Status: Done
Project: DRP 2-D Pipeline
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Normal
Reporter: ncaplar Assignee: ncaplar
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Attachments: PNG File 0 z5.png     PNG File example_1d_low_flux.png     PNG File example_1d_mid_flux.png     PNG File example_2d_low_flux.png     PNG File example_2d_mid_defocus.png     PNG File example_2d_mid_flux.png     PNG File m1 z5.png     PNG File m4 z5.png     PNG File median_wavefront.png     PNG File p1 z5.png     PNG File p4 z5.png     PNG File quality_in_defocus.png     PNG File quality_in_focus.png    
Issue Links:
Blocks
is blocked by PIPE2D-721 pfs_build_calibs routine, combineFibe... Done
Relates
relates to PIPE2D-696 Analyze Subaru images and create a 2d... Open
relates to PIPE2D-700 2d-psf analysis - ring like feature ... Won't Fix
relates to PIPE2D-614 Illumination estimate of the pupil sh... Done
relates to PIPE2D-654 Create post-stamp images for Subaru d... Done
relates to PIPE2D-701 2d psf analysis - wrongly initialized... Done
relates to PIPE2D-490 Evaluate the quality of the PSF fitti... Won't Fix
relates to PIPE2D-670 Improve modeling of pupil illuminatio... Won't Fix
Story Points: 6
Sprint: 2DDRP-2021 A

 Description   

Using post stamp images created in PIPE2D-654, and psf estimation algorithm from PIPE2D-614 (with improvements from PIPE2D-670), create solution for 2d psf, at any location on the detector plane.

These results will be used for PIPE2D-490 and general evolution of the quality of the 2d PSF solutions.



 Comments   
Comment by ncaplar [ 20/Jan/21 ]

Solutions are placed in `/tigress/ncaplar/PIPE2D-671`.  The description is the same as in PIPE2D-450 and PIPE2D-521.

positions_of_simulation_00 array contains positions of each PSF model. The columns are: 1. fiberId, 2. approximate x coordinate, 3. approximate y coordinate, 4. wavelength.

array_of_simulation_00 array contains arrays with 189x189 PSF models (9x times oversampled).

At the moment there is *_Jan08_v2 versions available. 

Comment by ncaplar [ 20/Jan/21 ]

Compilations of figures:

1. Median_wavefront - showing summary of wavefront measurments
2. quality_in_focus and quality_in_defocus - showing chi^2 after subtraction of model, as a function of variable chi2_max (chi^2 without any subtraction).

3. p4_z5,p1_z5,0_z5,m1_z5,m4_z5  - showing as an example how Z5 is changing as defocus
4. example_2d and example_1d - showing an example of the model and subtraction in 2d and 1d for a single spot; showing two example with lower and higher flux

There is an obvious problem in size of the psf at higher flux, visible as the ring around the psf solution. I will open a ticket to tackle this problem.

 

Comment by ncaplar [ 29/Jan/21 ]

Observing Figure quality_in_focus once can observe how point of Argon at around log10(chi^2_max)=2.7 & log10(chi^2)=1 perform particularly poorly. I see that all of these points are from redest available Argon point, at 966.06 nm. It seems that there is some sort of continuum at these locations which is not accounted for when cutting the images.

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