Terminals

XSELECT will currently run and produce graphics on the following device types:

GF  (GraphOn)  GTERM  NULL  (!)  PS    RETRO  SUN   
TEK4010V  PS  XTERM  XWINDOW  X11  GTERM   VT125O  MAC

Thus, Sunview users should be operating in a GTERM or SUN window. Set the plotting device using the DEVICE command, or by setting the ''plotdev" variable in the xsel.par file to ''/xterm" (for example).

When the plotting device is changed the new value is stored as the default in the xselect par file. On startup, if there is a saved session, Xselect first looks for the plotting device in the save session file (xsel_session.xsl). If it is empty there, or there was no saved session, Xselect looks in the par file for this device. If this parameter is empty, then Xselect checks the environment variable PGPLOT_TYPE, and uses its value if found. If no plot device was found, you will be prompted for one the first time it is needed. If you respond with a ?, then you will get a listing of available device types.

To change plot device WHILE IN PLT, you can type e.g. device /gt, then o or p will redisplay the plot on the new device. Note that on the Macs /tek seems to work more quickly and with less screen-flashing than /mac.

Note also, that SAOIMAGE will not run on TEK, RETRO, GF, or MAC terminals.

2 Known_Bugs/Features

• The code explicitely assumes that there is one events extension per file. Future decisions to pack lots of extensions into a single FITS file are not yet supported!

• For the obscat to work, the relevant parameters must be stored as keywords in the primary extensions of the events files.

• The method of storing HK parameters for ASCA has changed, so that now all the HK data for the whole sequence is stored in one file. Xselect does not support this format automatically, so to view the HK data, you must read it in by hand using the read hk command.