Description of the PLUTO-CHARON MUTUAL EVENTS bundle V1.0
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Bundle Generation Date: 2020-02-28
Peer Review: 2012 Asteroid Update Review, Tue May 01 00:00:00 MST 2012        
Discipline node: Small Bodies Node


Content description based on the data set catalog file description for the PDS3 version, EAR-A-3-RDR-PCME-V3.1
==============================================================================================================

Note: for PDS3 data sets migrated to PDS4, the following text is taken
verbatim from the data set description and confidence level note of the
PDS3 data set catalog file. In these cases, some details may not be correct
as a description of the PDS4 bundle.
                                                           
    During the period 1985-1990, the earth entered the orbital plane of Pluto 
    and its moon Charon, and the mutual eclipse events were observed from     
    ground-based observatories.  A subset of these data are included in this  
    data set, and more will be added in future updates.  The current version  
    contains photoelectric photometry data from thirty-nine events observed at
    Mauna Kea Observatory by Tholen, CCD photometry data from fifteen events  
    observed at Palomar Observatory by Buratti and colleagues, and            
    photoelectric photometry data from ten events observed at McDonald        
    Observatory by Young and Binzel.                                          
                                                                              
      Data                                                                    
      ====                                                                    
                                                                              
    The Mauna Kea data is in the file pcmemko.tab, and includes standard B    
    magnitudes and errors, and Julian date at mid-observation, corrected for  
    light-travel time.  The Palomar data is in the file pcmepal.tab, and      
    includes differential magnitudes and errors, and Julian date at           
    mid-observation (uncorrected).  The McDonald Observatory data, taken from 
    Young (1992), includes differential B and V photometry.                   
                                                                              
    Individual lightcurves are included in the subdirectory 'indiv'.  These   
    contain the same data as in the full data files.  The filenaming system is
    as follows: obs_yyyymmdd_f.tab, where obs is an abbreviation of the       
    observatory, yyyymmdd is the date of observation, and f is the filter.    
                                                                              
      Modification History                                                    
      ====================                                                    
                                                                              
    In January 2002 SBN personnel calculated UTC based on the Julian dates    
    provided and added it to the data files. At the time resolution of the    
    Julian date (less than 1.e-05), UTC and UT are equivalent. START_TIME and 
    STOP_TIME values were updated throughout as appropriate. No other data    
    values were changed.                                                      
                                                                              
    In 2008, the data from McDonald Observatory, from Young (1992) and with   
    additional discussion of the data given in Young and Binzel (1993), was   
    added to the data set.                                                    
                                                                              
    In 2012, the data were broken into individual lightcurves, supplied in a  
    separate subdirectory in addition to the original data files.  This change
    was made to facilitate loading the data into the data Ferret.             
                                                                              
      References                                                              
      ==========                                                              
                                                                              
    Young, E.F., An albedo and frost model of Pluto, Ph.D. thesis,            
    Massachusetts Institute of Technology, 1992.  [YOUNG1992]                 
                                                                              
    Young, E.F. and R.P. Binzel, Comparative mapping of Pluto's sub-Charon    
    hemisphere: Three least-squares models based on mutual event lightcurves, 
    Icarus 102, 134-149, 1993.  [YOUNG&BINZEL1993]


Known issues or problems with the data
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    Data Coverage and Quality                                                 
    =========================                                                 
                                                                              
        The data set is eventually intended to be a complete collection of    
    groundbased observations of the Pluto-Charon mutual events.  At present,  
    it contains visual photometric data from Mauna Kea Observatory, Palomar   
    Observatory, and McDonald Observatory.  The collection includes both      
    calibrated and uncalibrated data.  Additional data will be added in future
    updates.

PDS3 Source
===========

Version 1.0 of this bundle was migrated from version 3.1 of the PDS3 data set EAR-A-3-RDR-PCME-V3.1.