Page History

• Clean flicker noise (1/f)?
  • Aarynn: Thinks we should leave off for now
  • Everett: Will be hard to find clean regions of sky
• Snowball algorithm?
  • Aarynn: If we have this on they it will mask snowballs but bleed onto other stripes, erroneous flagging
  • Michael: Wouldn't be hard to adjust this
    • We need data for this to make sure its fine tuned.
    • Thinks on by default for now
    • Could imagine a second pass to check if snowballs are expanding into a neighbouring slice. 
  • Everett: Also thinks we deal with overflagging for now
    • Does it know not to mask reference pixels?
      • Michael: It specifically looks for saturated core surrounded by jump, impossible for this to be true for reference pixels
        • This behaviour does actually cause some issues for some existing observations near the edge of the detector. 
    • But can it understand where the edge of the detector is?
      • Michael: Doesn't think this is the issue.

• Flux conversion?
  • Everett: Might be difficult because each spectrum needs its own factor
    • If we keep as full frame then we need to apply things in the right way
    • Achrène - Either need to apply one photom for each substripe
      • Could build a single 2d array for this. 
  • Both cycle 4 proposals are TSO, photom less important
  • Michael: Is someday someone going to want to know this?
    • Achrène: This will eventually be done, just not a priority. 
  • Taylor/Hannah: If we don't have proper flux calibration it shouldn't be run. 
    • Don't want people to misinterpret. 
  • General summary is that we do want this eventually, but it's not super critical. 
• Extract_2d? 
  • Achrène: We should have full frame
    • General agreement

• SOSS SUPERSTRIPE - working to implement for Cycle 5 (leveraging DHS capabilities, can increase SOSS bright limits without sacrificing wavelength coverage)
• different ref pix for different subarray chunks (option to hop back to original ref pix for more ref pix, but less observationally efficient - smallest stripes = 20% photon loss) 

• 4 vs 2 vs 1 is roughly the same, it's a SNR thing

Aarynn: What about small stripes that are quite illuminated?

• Michael: Would need to look in more detail. 

• sprint happening soon:  4/28 - 5/2 
• make sure you have access to grit!

• Dodging 390Hz noise
• Strong options for the two imaging subarrays
• LRS has a range of conservative to aggressive cuts. Some weirder options too. 
  
  • Will loop back
• Taylor: Going through calwebb3 for MIRI and working through bugs and making Jira tickets
  • Found bug in assign_wcs for MIRI slit observations
  • TSO3 step doesn't do automatic centroiding, not good for MIRI photometry which doesn't do target acquisition

NIRISS: 

Three TR's in various review stage right now

• Jump/ramp fitting algorithms
• SOSS background model
• SOSS monochromatic PSF tilt

NIRCam:

• Working on flux and wavelength calibration for DHS - Targeting June
• Working with Cycle 4 PI's to make sure there isn't significant contamination
  • Helping to prioritise work