CMB Angular Power Spectrum

{
  "data": [
    { "type":"scatter","mode":"lines","name":"D_l",
      "x":[2,10,30,50,100,150,200,300,400,500,700,1000,1500,2000,2500],
      "y":[1200,950,750,800,1450,2700,5800,2800,1800,2600,1900,1500,400,180,50],
      "line":{"color":"#3666ff","width":3} }
  ],
  "layout":{
    "title":"CMB temperature angular power spectrum (schematic)",
    "xaxis":{"title":"Multipole moment l","type":"log"},
    "yaxis":{"title":"D_l = l(l+1)C_l/2π (µK²)"},
    "annotations":[
      {"x":200,"y":5800,"text":"1st acoustic peak","showarrow":true,"arrowhead":3,"ax":40,"ay":-30},
      {"x":500,"y":2600,"text":"2nd peak","showarrow":true,"arrowhead":3,"ax":30,"ay":-20}
    ]
  }
}