# Investigate why all the values of blendedness in the objectTable_tract catalogue are nan

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#### Details

• Type: Story
• Status: Done
• Resolution: Done
• Fix Version/s: None
• Component/s: None
• Labels:
None
• Story Points:
2
• Sprint:
DRP S21b
• Team:
Data Release Production
• Urgent?:
No

#### Description

All the values in the blendedness column of the objectTable_tract seem to be nan, investigate why this is.

#### Activity

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The specification for Blendedness in the Object table is:

  Blendedness:  functor: Column  args: base_Blendedness_abs_flux  dataset: meas 

and it looks like Scarlet doesn't make a base_Blendedness_abs_flux column. It does make:

['base_Blendedness_abs',
'base_Blendedness_abs_child_instFlux',
'base_Blendedness_abs_child_xx',
'base_Blendedness_abs_child_xy',
'base_Blendedness_abs_child_yy',
'base_Blendedness_abs_parent_instFlux',
'base_Blendedness_abs_parent_xx',
'base_Blendedness_abs_parent_xy',
'base_Blendedness_abs_parent_yy',
'base_Blendedness_flag',
'base_Blendedness_flag_noCentroid',
'base_Blendedness_flag_noShape',
'base_Blendedness_old',
'base_Blendedness_raw',
'base_Blendedness_raw_child_instFlux',
'base_Blendedness_raw_child_xx',
'base_Blendedness_raw_child_xy',
'base_Blendedness_raw_child_yy',
'base_Blendedness_raw_parent_instFlux',
'base_Blendedness_raw_parent_xx',
'base_Blendedness_raw_parent_xy',
'base_Blendedness_raw_parent_yy',]
}}

Will you take a look at the schema definition in Scarlet and double check that "base_Blendedness_abs" most accurately matches what base_Blendedness_abs_flux was providing?

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Yusra AlSayyad added a comment - The specification for Blendedness in the Object table is: Blendedness: functor: Column args: base_Blendedness_abs_flux dataset: meas and it looks like Scarlet doesn't make a base_Blendedness_abs_flux column. It does make: ['base_Blendedness_abs', 'base_Blendedness_abs_child_instFlux', 'base_Blendedness_abs_child_xx', 'base_Blendedness_abs_child_xy', 'base_Blendedness_abs_child_yy', 'base_Blendedness_abs_parent_instFlux', 'base_Blendedness_abs_parent_xx', 'base_Blendedness_abs_parent_xy', 'base_Blendedness_abs_parent_yy', 'base_Blendedness_flag', 'base_Blendedness_flag_noCentroid', 'base_Blendedness_flag_noShape', 'base_Blendedness_old', 'base_Blendedness_raw', 'base_Blendedness_raw_child_instFlux', 'base_Blendedness_raw_child_xx', 'base_Blendedness_raw_child_xy', 'base_Blendedness_raw_child_yy', 'base_Blendedness_raw_parent_instFlux', 'base_Blendedness_raw_parent_xx', 'base_Blendedness_raw_parent_xy', 'base_Blendedness_raw_parent_yy',] }} Will you take a look at the schema definition in Scarlet and double check that "base_Blendedness_abs" most accurately matches what base_Blendedness_abs_flux was providing?
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Sophie Reed added a comment -

From the table schema:"base_Blendedness_abs", "Measure of how much the flux is affected by neighbors: (1 - child_instFlux/parent_instFlux). Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details."

Show
Sophie Reed added a comment - From the table schema:"base_Blendedness_abs", "Measure of how much the flux is affected by neighbors: (1 - child_instFlux/parent_instFlux). Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details."
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Sophie Reed added a comment -

I was unable to find the base_Blendedness_abs_flux column in table schema going back to 2019 to compare this to.

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Sophie Reed added a comment - I was unable to find the base_Blendedness_abs_flux column in table schema going back to 2019 to compare this to.
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For future readers, just confirm that base_Blendedness_abs is fine.

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#### People

Assignee:
Sophie Reed
Reporter:
Sophie Reed
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#### Dates

Created:
Updated:
Resolved:

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