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Knowledgebase: MIPS
What are the Post-BCD (pbcd) data products I downloaded from the archive? Can I use them for science?
Posted by z-Vandana Desai on 01 December 2008 04:03 PM
The pbcd products available from the archive were originally intended as quick-look images of your data. Post-BCD products have been produced with generic namelists, and the parameters have not been optimized for your data set. Post-BCD products and Level 2 products are two names for the same thing.

More specifically, for the three Spitzer instruments, the IRAC pbcd data products (mosaics) are often of science quality, but there are no guarantees and users should go back and inspect the BCD data products to verify results as needed. The IRS pbcd data products are often of science quality, but users should always inspect the BCD products as well before analysis and publication, because the PBCD data products are made using simplified assumptions, and only basic reductions are performed. To achieve the ultimate spectral quality from their data, users are encouraged to start with the BCDs and use one or more of the SSC or contributed software packages (e.g., IRSCLEAN, SPICE, CUBISM, etc.) to reduce and analyze their data. The MIPS 24 micron PBCD data products are often of science quality, but there are no guarantees and users should go back and inspect the BCD data products to verify results as needed. Users will definitely need to be cautious with the 70 and 160 micron PBCD data products and going back to the BCD data products at these wavelengths is often required to eliminate artifacts and improve the quality of the final data products.