The 24um backgrounds listed in MJy/sr are not from MIPS, but from Reach.
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Three separate regions were fitted with polynomials, to better match the weird emission/absorption between 9 and 12 microns.
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<pre><img SRC="p1.gif"><img SRC="p6.gif"></pre>
<pre><img SRC="p2.gif"><img SRC="p7.gif"></pre>
<pre><img SRC="p3.gif"><img SRC="p8.gif"></pre>
<pre><img SRC="p4.gif"><img SRC="p9.gif"></pre>
<pre><img SRC="p5.gif"></pre>
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The difference between sky extractions using "dedicated" and "outrigger" SL observations.
<pre><img SRC="ngc1266_diff.gif"></pre>
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The on-source, sky-subtracted spectrum (for NGC 1705) is extracted in two ways: by subtracting a BGOM sky AFTER the cube has been built, and BEFORE the cube has been built.  The solid line in the righthand panel is the on-source spectrum (removed in lefthand panel for clarity).  The lefthand plot in the second row is the percentage difference; the righthand plot compares the difference in the two approaches to sky subtraction to the on-source spectrum.
<pre><img SRC="1.gif"><img SRC="2.gif"></pre>
<pre><img SRC="3.gif"><img SRC="4.gif"></pre>
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Last updated 13 Apr 2005