Tutorial: JWST image data

[overskud]

Julia Version 1.12.0

using Downloads

fname = Downloads.download(
          "https://stpubdata-jwst.stsci.edu/ero/jw02731/L3/t/"*
          "jw02731-o001_t017_nircam_clear-f187n_i2d.fits"
       )

ERROR: RequestError: Could not resolve host: stpubdata-jwst.stsci.edu while requesting https://stpubdata-jwst.stsci.edu/ero/jw02731/L3/t/jw02731-o001_t017_nircam_clear-f187n_i2d.fits

[cgarling]

I confirm that this URL is no longer working
I can find the data on MAST by querying the portal for proposal 2731.
I think I found an alternative url, opening PR now
https://mast.stsci.edu/api/v0.1/Download/file?bundle_name=MAST_2025-11-29T2146.sh&uri=mast:JWST/product/jw02731-o001_t017_nircam_clear-f187n_i2d.fits

[cgarling]

This fix works for me but please reopen if there is still a problem.

[overskud]

@cgarling
Cannot reopen
Data downloaded

Differences/issues

carina = carina_full[begin:10:end, begin:10:end]
┌ 1434×859 AstroImage{Float32, 2} ┐
├─────────────────────────────────┴─────────────────────── dims ┐
  ↓ X Sampled{Int64} 1:10:14331 ForwardOrdered Regular Points,
  → Y Sampled{Int64} 1:10:8581 ForwardOrdered Regular Points
└───────────────────────────────────────────────────────────────┘
     ↓ →    1   11   21   31   41   51  …  8531  8541  8551  8561  8571  8581
     1    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
    11    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
    21    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
    31    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
     ⋮                          ⋮       ⋱           ⋮                    
 14301    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
 14311    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
 14321    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN
 14331    NaN  NaN  NaN  NaN  NaN  NaN      NaN   NaN   NaN   NaN   NaN   NaN

imview(carina; clims=Percent(98))

SYSTEM (REPL): showing an error caused an error

ERROR: 1-element ExceptionStack:
FieldError: type Core.TypeName has no field `mt`, available fields: `name`, `module`, `singletonname`, `names`, `atomicfields`, `constfields`, `wrapper`, `Typeofwrapper`, `cache`, `linearcache`, `partial`, `hash`, `max_args`, `n_uninitialized`, `flags`, `cache_entry_count`, `max_methods`, `constprop_heuristic`
Stacktrace:

Still able to plot

implot(carina; grid=false, clims=Percent(98))

No stop_coord_pix

arcmin_px = norm(stop_coord_pix .- start_coord_pix)

ERROR: UndefVarError: `stop_coord_pix` not defined in `Main`
Suggestion: check for spelling errors or missing imports.
Stacktrace:
 [1] top-level scope
   @ REPL[37]:4

[cgarling]

Reopening as I confirm the error on attempted imview with

julia> imview(carina; clims=Percent(98))
859×1434 mappedarray(Error showing value of type MappedArrays.ReadonlyMultiMappedArray{ColorTypes.RGBA{FixedPointNumbers.N0f8}, 2, Tuple{SubArray{Float32, 2, PermutedDimsArray{Float32, 2, (2, 1), (2, 1), Matrix{Float32}}, Tuple{StepRange{Int64, Int64}, Base.Slice{Base.OneTo{Int64}}}, false}, AstroImageMat{Any, Tuple{Y{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}, X{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}}, Tuple{}, MappedArrays.ReadonlyMappedArray{Any, 2, AstroImageMat{Float32, Tuple{Y{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}, X{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}}, Tuple{}, SubArray{Float32, 2, PermutedDimsArray{Float32, 2, (2, 1), (2, 1), Matrix{Float32}}, Tuple{StepRange{Int64, Int64}, Base.Slice{Base.OneTo{Int64}}}, false}, Tuple{Y{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}, X{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}}}, AstroImages.var"#clampednormedview##0#clampednormedview##1"{Float64}}, Tuple{Y{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}, X{DimensionalData.Dimensions.Lookups.Sampled{Int64, StepRange{Int64, Int64}, DimensionalData.Dimensions.Lookups.ForwardOrdered, DimensionalData.Dimensions.Lookups.Regular{Int64}, DimensionalData.Dimensions.Lookups.Points, DimensionalData.Dimensions.Lookups.NoMetadata}}}}}, AstroImages.var"#colormap#_imview##0"{typeof(identity), ColorSchemes.ColorScheme{Vector{ColorTypes.RGB{Float64}}, String, String}, Float64, Float64}}:

SYSTEM (REPL): showing an error caused an error
ERROR: 1-element ExceptionStack:
FieldError: type Core.TypeName has no field `mt`, available fields: `name`, `module`, `singletonname`, `names`, `atomicfields`, `constfields`, `wrapper`, `Typeofwrapper`, `cache`, `linearcache`, `partial`, `hash`, `max_args`, `n_uninitialized`, `flags`, `cache_entry_count`, `max_methods`, `constprop_heuristic`
Stacktrace:
  [1] getproperty(x::Core.TypeName, f::Symbol)
    @ Base ./Base_compiler.jl:54
  [2] func_print(io::IOContext{REPL.LimitIO{Base.TTY}}, f::Function, types::Type)
    @ MappedArrays ~/.julia/packages/MappedArrays/jTqdY/src/MappedArrays.jl:231
  [3] showarg(io::IOContext{…}, A::MappedArrays.ReadonlyMultiMappedArray{…}, toplevel::Bool)
    @ MappedArrays ~/.julia/packages/MappedArrays/jTqdY/src/MappedArrays.jl:211
  [4] array_summary(io::IOContext{…}, a::MappedArrays.ReadonlyMultiMappedArray{…}, inds::Tuple{…})
    @ Base ./show.jl:3199
  [5] summary(io::IOContext{…}, a::MappedArrays.ReadonlyMultiMappedArray{…})
    @ Base ./show.jl:3196
  [6] show(io::IOContext{…}, ::MIME{…}, X::MappedArrays.ReadonlyMultiMappedArray{…})
    @ Base ./arrayshow.jl:368

I'm not sure what this is, anyone have an idea? implot does work, imview does not.

I fixed the misnamed variables in PR #191.

[cgarling]

Actually it looks like this is a MappedArrays.jl issue on Julia v1.12, see JuliaArrays/MappedArrays.jl#64, so closing again ^.^