PDS_VERSION_ID        = PDS3                                                  
                                                                              
RECORD_TYPE           = "STREAM"                                              
OBJECT                = TEXT                                                  
  PUBLICATION_DATE    = 2004-05-21   /* Peer Review Date */                   
  NOTE                = "                                                     
    DI/EAR-C-LO72CCD-3-9P-IMAGES-PHOT-V1.0                                    
    LOWELL 72-IN IMAGES AND PHOTOMETRY OF 9P/TEMPEL1: 2000-2001               
    Calibration Directory Information                                         
    "                                                                         
END_OBJECT            = TEXT                                                  
                                                                              
END                                                                           
                                                                              
                                                                              
This directory contains the set of bias frames and flat fields used           
to reduce the raw, broadband BVR images of Tempel 1 acquired from             
September 2000 through January 2001.  This directory includes                 
a table of raw data images to which a bias special correction was             
applied during the reduction process.  Also, transmission profiles            
for the broadband BVR filters are provided as ASCII tables.                   
                                                                              
                                                                              
Bias frames and flat fields                                                   
===========================                                                   
                                                                              
  Bias frames and flat fields have the following formats for file names:      
                                                                              
    YYMMDD_BIAS.FIT  = bias frame                                             
    YYMMDD_FLATB.FIT = B-filter flat field                                    
    YYMMDD_FLATR.FIT = R-filter flat field                                    
    YYMMDD_FLATV.FIT = V-filter flat field                                    
                                                                              
  where YYMMDD is the UTC year ("00" = 2000), month, and day the images       
  were taken.                                                                 
                                                                              
  The following bias frames and flat fields were used to reduce the           
  raw images in the dataset:                                                  
                                                                              
    Obs Date UTC              CCD       Bias Frames/Flat Fields               
    ------------------------  --------  -----------------------               
    2000-09-28 to 2000-10-01  Loral 2K  000929_BIAS.FIT                       
                                        000929_FLATR.FIT                      
                                        000929_FLATV.FIT                      
                                                                              
    2000-10-17                Loral 2K  001017_BIAS.FIT                       
                                        001017_FLATR.FIT                      
                                        001017_FLATV.FIT                      
                                                                              
    2000-10-18                Loral 2K  001018_BIAS.FIT                       
                                        001018_FLATR.FIT                      
                                        001018_FLATV.FIT                      
                                                                              
    2000-11-19 to 2000-11-20  SITe 2K   001119_BIAS.FIT                       
                                        001119_FLATR.FIT                      
                                                                              
    2000-12-16                SITe 2K   001215_BIAS.FIT                       
                                        001215_FLATR.FIT                      
                                        001215_FLATV.FIT                      
                                                                              
    2000-12-18                NCCD      001218_BIAS.FIT                       
                                        001218_FLATB.FIT                      
                                        001218_FLATR.FIT                      
                                        001218_FLATV.FIT                      
                                                                              
    2001-01-14                NCCD      010114_BIAS.FIT                       
                                        010114_FLATR.FIT                      
                                                                              
                                                                              
Special Bias Correction Table                                                 
=============================                                                 
                                                                              
  The Loral 2K chip, used for images taken from 2000-09-28 through            
  2000-10-17, experienced a variable bias that was quantifiable.              
  The bias correction table, BIASCORR.TAB, lists the raw data files           
  to which a special bias correction was applied to account for the           
  variable behavior.  On other observing dates, there was no variablity       
  in the bias and a standard bais correction was applied.                     
                                                                              
                                                                              
Filters                                                                       
=======                                                                       
                                                                              
  ASCII tables containing the transmission profiles for the                   
  broadband BVR filters used for this data set are provided:                  
                                                                              
      FILTER_B.TAB = Profile for the B filter                                 
      FILTER_R.TAB = Profile for the R filter                                 
      FILTER_V.TAB = Profile for the V filter                                 
                                                                              
  These tables were downloaded from the Lowell Observatory website:           
                                                                              
      http://www.lowell.edu/Research/Mesa/instrumentation/ccdfilters.html     
                                                                              
 Transmission curve plots for each filter is also available at the above      
 website.