This class is used for an Extension HDU when the XTENSION
Card
has a non-standard value. In this case, Astropy can figure out how big the data is but not what it is. The data for this HDU is read from the file as a byte stream that begins at the first byte after the header END
card and continues until the beginning of the next header or the end of the file.
A Non-standard Extension HDU class.
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them
