ADC Viewer Example Session: 6

Catseye: Plot 1

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This frame displays the selected X-Y plot. The frame contains:

X-Y plot
X, Y range inputs
Log scaling options
Replot button

The plot selected from the previous frame is displayed here. There is actually no real science content to this plot. We see here the effect of Abell's quantization of galaxy populations into distinct "richness" bins. When the authors of this catalog calculated the mean apparent population (Pop) of each cluster, they simply use the mean galaxy population for each richness group and then scaled it by its distance, which was simply derived by the magnitude of the 10th brightest galaxy in each cluster (Mag10). Since we're plotting Mag10 vs. Pop, we are plotting the same parameter scaled by different constants, which can be seen as the different curves in the plot.

To illustrate range and axis modification, we chose to limit the X range from 12-15 magnitude, and use a log scale for the Y axis, to compress the dynamic range a bit.

TO GO ON: Press Rescale Plot to see the new plot.

EXAMPLE BELOW