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Figure 1: Fully-reduced SL and SH spectra for HD 36917 and HD 37411. The arrows indicate the positions of the PAH bands of interest. The inset displays the residual (SL) spectrum when approximating the continuum with a single spline. |
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Figure 2:
The derived 6.2 ![]() |
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Figure 3:
The derived ``7.7'' ![]() |
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Figure 4:
The derived 11.2 ![]() ![]() |
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Figure 5:
Left: the normalised profiles of the ``7.7'' ![]() ![]() |
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Figure 6:
Correlation between the central wavelength of the 7-8 ![]() |
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Figure 7:
8 ![]() |
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Figure 8:
Left: the normalised source profile of a section from the SL1 long-slit 2-D spectral image as observed toward HD 36917. As a result of the angle of the order across the image, the profile centre moves in cross-dispersion. This results in a changing distribution of the profile signal across pixels, hence the apparent lower than unity profile at certain wavelengths. The presence of a spatially extended component near the 11.2 and 12.7 ![]() ![]() |
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Figure 9: The local background corrected SL ( bottom) and SH ( top) spectra for HD 36917, as obtained with the decomposition. The corrected spectra are grey, the uncorrected spectra are dotted grey and the background estimates are black. The boxes show a few interesting spectral regions. |
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