Archive structure

Data organization

Each of the data sets included in the Suzaku archive are organized in distinct directories:

• obs: contains the Suzaku science data. These data are organized by sequence number, each corresponding to an observation.

• trend: contains instrument monitoring data. These data are organized by instrument first and, then by type of data.

Whithin each main directory the organization is as followed.
1) The obs directory is divided in subdirectory named after the first digits of the sequence number. Sequences are placed under that subdirectories .

                                /obs  
            /0    /1   /2   /3   /4   /5   /6   /7    /8   /9 
                                 |                       
                             /sequence

2) The trend directory is divided in subdirectory interval of one month named YYYY_NN, where YYYY is the year and NN defines the month within that year. In addition there is a directory named /log that contains the complete ``as flown'' timeline of the satellite. This file, suzaku_log.txt gets updated daily.

                              /trend
   /2005_08   ...........           /2006_01 ....                     /log 
                                        |                               |  
                    /xis              /hxd    /xrs   /misc        suzaku_log.txt
                     |                  |       |       |
          /xis0 /xis1 /xis2/ xis3     /type   /type  /type
                 |
               /type

The 'obs' data directory structure

The science data are located under the /obs main directory. Each sequence is divided into the following subdirectories :

• /auxil: contains files common to all instruments such as attitude and orbit as well as a catalog listing all the files present in the sequence.
• /log: contains html files reporting logs on the data processing.

• /hxd : contains all the science and HK files related to the HXD instrument. The data within are further sub-divided into directories related to the file types.

• /xis: contains all the science and HK files related to the XIS instrument. The data within are further sub-divided into directories related to the file types.

Each of the instrument directory is subdivided in subdirectories.

• /event_uf: contains the unfiltered event files for all data modes and sensors (HXD: WELL and WAM, XIS: XIS0, XIS1, XIS2, XIS3). There are also present support files as GTI.

• /event_cl: contains the cleaned event files.

• /hk: contains housekeeping files related to the specific instrument.

• /products: contains all the high-level products derived from the science files. These are lightcurves and spectra of the targetted source, and images of the entire FOV. They are provided as FITS files with their plots as a GIF.

The overall directory structure for a sequence is therefore the following :

                                /sequence
                                    |            
  /auxil   /log              /hxd                                 /xis
                               |                                   |
                /event_uf /event_cl /hk /products   /event_uf /event_cl /hk /products

The 'trend' directory structure

The data under the /trend main directories are not subdivided into directories and therefore data files are directly stored under each /trend type.