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Suzaku Guest Observer Facility

Suzaku Archive: Getting started

General

The Suzaku archive is divided in two main directories science and trend data. The science data are organized by observations, where an observation contains data from all instruments and is identified by a 9 digit number. The /obs directory contain the science data and it is subdivided in directories named after the first digits of the sequence number under which the observations are located. The trend area instead is divided in months interval named YYYY_NN, where YYYY is the year and NN is the numeric value for the month. For each month the trend (or monitor) data are organized by type for each of the instrument. The archive structure is therefore:

Suzaku directory structure


Archive access : Web, FTP and wget

At the HEASARC the Suzaku archive can be accessed using the web interfaces Browse or via anonymous FTP or via Wget.

  • Access via Web : The archive access via the Web makes use of database tables to search for the science data. The currently available tables are :
    • suzamaster records high-level information for each Suzaku observation.
    • suzaxislog dedicated to the XIS to allow searches of the different instrument configurations
    These tables can be queried for position, time and several other parameters, and from the result page it is possible to select and retrieve the data files. These Suzaku tables are linked to each other via the observation id or sequence number. This allows the user to 'jump' from the suzamaster to the suza table, for example, if there is a TDRSS message related to a specific observation of a target.

  • Anonymous FTP : If the observation id (sequence number) is already known, the data can be retrieved via anonymous FTP. For example, if the user wants to retrieve the sequence '100001010' observed in August 2005, she/he can either download the files individually (see Example 1) or create and download a tar file containing the entire observation (see Example 2).
  •  
    Example 1
    
            ftp heasarc.gsfc.nasa.gov 
                   (username: anonymous, password: your_e-mail_address)
            %cd suzaku/data/obs/1/100001010
            %binary
            %[prompt]
            %[m]get file_name[s]
            %quit
    
    Example 2 
    
            ftp heasarc.gsfc.nasa.gov 
                   (username: anonymous, password: your_e-mail_address)
            %cd suzaku/data/obs/1/
            % prompt
            % get 100001010.tar.gz
            %quit
    
    

  • Wget : If you have wget installed, and the observation id is already known, the data can be retrieved via 'wget'. For example using the HHTP protocal, if the user wants to retrieve the sequence '100001010' observed in August 2005, she/he can retrive the entire sequence (see Example 1) or data for a single instrument (see Example 2)
    Example 1 
     
       wget -q -nH --cut-dirs=5 -r -l0 -c -N -np -R 'index*' -erobots=off --retr-symlinks http://heasarc.gsfc.nasa.gov/FTP/suzaku/data/obs/1/100001010/ 
    
    Example 2
       wget -q -nH --cut-dirs=5 -r -l0 -c -N -np -R 'index*' -erobots=off --retr-symlinks http://heasarc.gsfc.nasa.gov/FTP/suzaku/data/obs/1/100001010/xis/ 
    
    
    Similarly using the FTP protol the 'wget' command for the Example 1 is :
    Example 1
     
       wget --passive-ftp -q -nH --cut-dirs=5 -r -l0 -c -N -np --retr-symlinks ftp://heasarc.gsfc.nasa.gov/suzaku/data/obs/1/100001010/ 
    
    The combination of the 'wget' with the FTP protocol allows also to retrive data via a tar file. The commands for the Example 1 and 2 are:
    Example 1 
       mycom> wget --passive-ftp -q ftp://heasarc.gsfc.nasa.gov/suzaku/data/obs/1/100001010.tar 
    
    Example 2
        mycom> wget --passive-ftp -q ftp://heasarc.gsfc.nasa.gov/suzaku/data/obs/1/100001010/xis.tar 
    
    

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This file was last modified on Monday, 04-Oct-2010 13:08:39 EDT

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