Matching to Spitzer and Weeding the SEDs

In Identification of Previously Known Objects on Candidate List, we established the complete list of previously-known YSOs.

Now, we have, independently, done the Spitzer data reduction. We need to compare this catalog of known sources with the catalog from the Spitzer data reduction (which also includes 2MASS).

When I do this, sources off the edge of the Spitzer maps will not have a match, because they have no Spitzer data. Some sources will have only I1/I3 data, and some will have only I2/I4 data. (Do you remember why?) Some sources in BRC 27 we have already identified as likely very interesting sources, but because they are embedded in bright, extended nebulosity, we are going to have a hard time finding an automatic match to those sources.

Here is what I get for all of the matches to the set of previously known sources in BRC 27: litsrcs+spitzer-brc27-0916-lmr.txt