PDS_VERSION_ID                  = PDS3                                        
RECORD_TYPE                     = FIXED_LENGTH                                
RECORD_BYTES                    = 80                                          
INSTRUMENT_HOST_ID              = EFOSC2                                      
TARGET_NAME                     = "46P/WIRTANEN (1948 A1)                     
OBJECT                          = TEXT                                        
  PUBLICATION_DATE              = UNK                                         
  NOTE                          = "ROSETTA SUPPLEMENTARI ARCHIVE"             
END_OBJECT                      = TEXT                                        
END                                                                           


ROSETTA SUPPLEMENTARY ARCHIVE EFOSC2 DATA

1. Introduction

  This volume contains all (low resolution) spectra of Comet 46P/Wirtanen
that were used to perform the analysis published in Schulz et al. (1998)
in wavelength- and flux-calibrated form. The whole two-dimensional frames
are archived, although, neither does the comet cover the complete spatial
range nor are the spectra usefull beyond 7500 Angstrom, due to heavy
fringing in that red part of the CCD. The data are in FITS format and are
grouped in directories according to their time of observation.
The filenames further reflect their observation time,
where the first two characters are the day (corresponding to the month
in the directory name), followed by the UniversalTime (i.e.: DDutHHMM.fit)
of the start of the exposure.

The data acquired in July, September, October and December 1996 were 
obtained with the EFOSC2 instrument attached to the ESO/MPG 2.2m Telescope,
whereas those of November 1996 were taken with the EFOSC instrument at the
ESO 3.6m Telescope. The fluxes are in units of 10**-19 erg/(sqcm*s*Angstrom)
and in dispersion direction the units are Angstrom. In spatial direction
the units are left unchanged i.e. they represent CCD pixels. The nominal
pixel scale for the EFOSC2/2.2m combination is 0.262 arcseconds whereas the
EFOSC/3.6m has 0.61 arcseconds per CCD pixel.
For the EFOSC2 spectra either grism #1 or #3 were used with a slit width of 
2". The EFOSC data were obtained through the grism B150 and a 2" slit.


2. File formats

  Each label file was created with the fits2pds (f2p) tool provided by the
PDS Small Bodies Node. The name convention used is:

        ESO_C_EF2_C_YYYYMMDDTHHSS.LBL

, where YYYYMMDD is the year (in year-month-day_of_year format), and 
HHSS is the time of capture. These label files point to the corresponding
FITS files.

3. Volume contents

  The files on this volume are organized in one top-level directory with 
several subdirectories. The following table shows the structure and content 
of these directories. Int he table, directory names are enclosed in square 
brackets ([]), upper-case letters indicate an actual directory or file name,
and lower-case letters indicate the general form of a set of directory or 
file names.

FILE						CONTENTS

Top-level directory
|
|- AAREADME.TXT					The file you are reading
|
|- VOLDESC.CAT					A description of the contents
|  						of this volume in a format 
|						readable by both
|                                               humans and computers.
|
|- [CATALOG]					A directory containing 
|      |					information 
|      |                                        about the EFOSC2 dataset.
|      |
|      |- CATINFO.TXT                           Description of files in the 
|      |                                        CATALOG directory.
|      |
|      |- MISSION.CAT                           Mission catalog object.
|      |
|      |- INSTHOST.CAT				Instrument host catalog 
|      |                                        object.
|      |
|      |- INST.CAT                              Instrument catalog object.
|      |
|      |- PERSON.CAT                            Person catalog object.
|      |
|      |- REF.CAT                               Reference catalog object.
|      
|- [DATA]
|     |
|     |- ESO_C_EF2_C_YYYYMMDDTHHMMFF.FIT        FITS data file.
|     |
|     |- ESO_C_EF2_C_YYYYMMDDTHHMMFF.LBL        PDS label file describing  
|     |                                         the corresponding 
|                                               FITS data file.
|
|- [DOCUMENT]     
|     |
|     |- DOCINFO.TXT                            Description of files in the
|     |                                         DOCUMENT directory
|     |
|     |- EFOSC2COOKBOOK.PS                      CookBook for the EFOSC2
|     |                                         Instrument in Postscript format
|     |
|     |- EFOSC2MANUAL.PS                        User's Manual for the EFOSC2
|                                               Instrument in Postscript format
|     
|- [INDEX]
|     |
|     |- INDEX.LBL				A PDS detached label 
|     |                                         describing INDEX.TAB.
|     |
|     |- INDEX.TAB                              Tabular summary of data files.
|     |
|     |- INDXINFO.TX				Description of files in the 
|                                               INDEX directory.
|- [QUICKLOOK]
      |
      |- ESO_C_EF2_C_YYYYMMDDTHHMM.JPG          Jpeg quick look image
      |
      |- ESO_C_EF2_C_YYYYMMDDTHHMMQL.LBL        PDS label file describing
the 
                                                corresponding quick look image.

4. Contacts

   Rita Schulz: 

         ESA Space Science Department
         rita.schulz@esa.int

   Jogy Stueve:
 
         Astronomisches Institut, Ruhr-Universitat Bochum
         stuwe@strw.leidenuniv.nl

   Joe Zender
 
         ESA Space Science Department
         joe.zender@esa.int

   Jose Vazquez

         ESA Space Science Department
         jose.vazquez@rssd.esa.int