Image Details
Caption: Figure 1.
This mosaic shows the 62
9 × 69
4 section of the NGC 6720 images common to both the full field and quadrant filters. Panels (a) through (e) show the emission-line
linear images corrected for contamination, if any, for the underlying continuum and non-targeted emission-lines, normalized
to the maximum features being white. Panel (f) shows the extinction index
c
Hβ derived from the surface brightness in Hα and Hβ with the scale indicated in Figure
2. The parallel faint linear features passing through the central star in the
c
Hβ image are residual "scars" caused by small photometric errors near the edges of the two CCD detectors of the WFC3-VIS. The
pointing was changed between two otherwise identical exposures to allow coverage of the gap between the detectors. The vertical
axis is pointed toward P.A. = 330°.
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