DECam Calibration Files
Current calibration files used by the community pipeline can be found here:
ftp://ftp.noao.edu/pub/valdes/DECamCPCalFiles150123/
The name of the files available in that directory mean:
- bpm - bad pixel masks
  
- fringecor - fringe templates
  
- hfix - header fixing values
  
- linearity - linearity coefficients
  
- starflat - star flat derived illumination flat
  
- wcs - WCS distortion coefficients
  
- xtalk - crosstalk coefficients
  
The timestamps like 56475 and 56534 are the MJD of when they become applicable.  Currently the only changed calibration is starflat.