Index of /holdings/ear-c-igi-3-edr-borrelly-v1.0

Icon  Name                    Last modified      Size  Description
[DIR] Parent Directory - [DIR] calib/ 18-Jun-2004 19:22 - [DIR] catalog/ 18-Feb-2011 13:21 - [DIR] data/ 27-Sep-2005 11:57 - [DIR] document/ 27-Sep-2005 11:52 - [DIR] DOWNLOAD/ 07-Nov-2019 11:07 - [DIR] index/ 18-Sep-2008 10:49 - [TXT] aareadme.txt 25-Jun-2007 11:29 5.5K [TXT] dataset.html 07-Nov-2019 11:07 3.8K [   ] 25-Jun-2007 11:25 3.1K [PDS catalog file]
PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
OBJECT               = TEXT                                                   
  NOTE               = "AAREADME file for Borrelly earth based images"        
  PUBLICATION_DATE   = 2007-06-25                                             
END_OBJECT           = TEXT                                                   
*** NOTE: The Version 1 delivery volume of this data set was discovered       
***       to contain corrupted FITS files in the data/ directory.  This       
***       was corrected and a second version of the delivery volume           
***       created and submitted to PDS Engineering Node and the NSSDC         
***       in July 2007.                                                       
This data set collection contains earth-based images of comet Borrelly.       
The images included here were obtained at the McDonald Observatory on         
five different observing runs during the 2001 apparition:                     
   21-23 Sep 2001                                                             
      12 Nov 2001                                                             
   04-07 Dec 2001                                                             
   07-08 Feb 2002                                                             
   17-18 May 2002                                                             
The December data were obtained at the 2.1-m Otto Struve telescope and the    
data from the other four runs were obtained at the 2.7-m Harlan J. Smith      
telescope.  In both cases, the Imaging Grism Instrument (IGI), a 5:1 focal    
reducer and a TeK 1024x1024 CCD were used.  On the 2.7-m telescope, this      
configuration produces a vignetted field of view with 0.57 arcsec pixels.  On 
the 2.1-m the field of view is 6 arcmin, with 0.48 arcsec pixels.             
On almost all nights, both broadband V and R filters were used. (On 7 Dec and 
17 May, only R images were obtained.)                                         
On photometric nights, Landolt standard stars were observed at several        
airmasses to provide a measurement of the extinction and a means of obtaining 
an absolute calibration.                                                      
There are four data directories.  The first (BASIC) contains about 160 files  
which are bias subtracted, flat fielded images of comet Borrelly from all of  
the observing runs.  The second (STANDARDS) contains about 100 images of      
standard star fields that are used to calibrate the data.  The third          
directory (CALIBRATED) includes all of the calibrated images (images from     
nights where standard stars were obtained). The calibrated images are a       
subset of the images in the basic directory.  The fourth directory            
(PROCESSING) contains the bias frames and the flat field images that were     
used to process the data.  The filenames contain the date and filter          
information for which they were used.  All of the data files are in FITS      
An extensive discussion of the data can be found in Farnham, T.L. and         
A.L. Cochran, 'A McDonald Observatory Study of Comet 19P/Borrelly: Placing    
the Deep Space 1 Observations into a Broader Context', Icarus, 160, 398-418,  
This description was written by Tony L. Farnham                               
Questions regarding the scientific elements of the data set:                  
Tony Farnham                                                                  
Small Bodies Node, Planetary Data System                                      
Department of Astronomy, University of Maryland                               
College Park, MD 20742-2421                                                                                                   
Questions regarding PDS elements of the data set: