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JUDO2 - "User Defined Overlay"

User Defined Overlay is an optional feature that enables users to draw circles, polylines, and polygons on the JUDO2 screen.

Usage :

  1. On JUDO2, display the sky area that you want to draw and select the image. See User Guide for information on how to display.
  2. Click [Permalink of this page] of [Links] in the side menu. The URL (permanent link) of the current screen is displayed in the address bar of the browser.
  3. Decide the shape and find its coordinates, and enter them into the "Shape definition" part in the examples below.
  4. Connect the URL obtained in the 2nd step + &selectedLayer=UserDefinedOverlay&UserDefinedOverlay= (as shown in red in URLs below) + "Shape definition", and then access the URL!
If you already know coordinates of the center of the image and shape you want to display, replace values of the URL examples below with them, and open it in your browser.

Examples :

Circle - GRB 231115A position with M82

https://darts.isas.jaxa.jp/app/judo2/?center_lng=149.0205&center_lat=69.6719&zoom=50&coord=J2000&Base=SDSS9_color&Top=SDSS9_color&TopAlpha=100&GraphicAlpha=100&selectedLayer=UserDefinedOverlay&UserDefinedOverlay=[{"shape":"circle","data":[149.0205,69.6719,0.0333],"options":{"color":"white"}}]

Shape definition
[{
["shape":"circle",
["data":[149.0205,69.6719,0.0333],
["options":{"color":"white"}
}]
Reference: doi:10.1038/s41586-024-07285-4 arXiv:2312.1464 Figure 1.

Polyline - Cassiopeia

https://darts.isas.jaxa.jp/app/judo2/?center_lng=123.58&center_lat=-2.15&zoom=12&coord=galactic&Base=ABL_P_DSS2_color&Top=Constellations1&TopAlpha=60&GraphicAlpha=70&selectedLayer=UserDefinedOverlay&UserDefinedOverlay=[{"shape":"polyline","data":[[2.29452158,59.1497811],[10.12683778,56.53733116],[14.1772154,60.7167403],[21.45396446,60.23528403],[28.59885697,63.67010079]],"options":{"color":"red"}}]

Shape definition
[{
["shape":"polyline",
["data":[[2.29452158,59.1497811],[10.12683778,56.53733116],[14.1772154,60.7167403],[21.45396446,60.23528403],[28.59885697,63.67010079]],
["options":{"color":"red"}
}]

Polygon (Square) - GRB 230307A position

https://darts.isas.jaxa.jp/app/judo2/?center_lng=60.859338&center_lat=-75.37883&zoom=57&coord=J2000&Base=ABL_P_DSS2_color&Top=ABL_P_DSS2_color&TopAlpha=100&GraphicAlpha=100&selectedLayer=UserDefinedOverlay&userDefinedOverlay=[{"shape":"polygon","data":[[60.88,-75.3735],[60.88,-75.3835],[60.84,-75.3835],[60.84,-75.3735]],"options":{"color":"red"}}]

Shape definition
[{
["shape":"polygon",
["data":[[60.88,-75.3735],[60.88,-75.3835],[60.84,-75.3835],[60.84,-75.3735]],
["options":{"color":"red"}
}]
Reference: doi:10.1038/s41586-023-06759-1 Supplementary Figure 1 in the Supplementary Information.

Polygon (Triangle) - Summer Triangle

https://darts.isas.jaxa.jp/app/judo2/?center_lng=65.537¢er_lat=3.940&zoom=5&coord=galactic&Base=ABL_P_DSS2_color&Top=Constellations2&TopAlpha=50&GraphicAlpha=50&selectedLayer=UserDefinedOverlay&userDefinedOverlay=[{"shape":"polygon","data":[[297.6958,8.8683],[279.23458,38.7836],[310.3579,45.2803]],"options":{"color":"blue"}}]

Shape definition
[{
["shape":"polygon",
["data":[[297.6958,8.8683],[279.23458,38.7836],[310.3579,45.2803]],
["options":{"color":"blue"}
}]

Notes :