File Descriptions and Rules for Astrometric Data Reduction

The purpose of this document is to describe the different files found in the standard reduction area and to document the format and setup of these files.

Location of reduction area.

The reduction area can be found in /gryll/data6/buie/reduced. Inside this directory, there are numerous directories named for the night of observation. In all cases, search data are arranged on a night-by-night basis and the directory name will be YYMMDD. Deviations from this six character name are made only for followup data that cannot be organized strictly within one night (this is most commonly the case for WIYNQ data).

Directory permission and ownership.

All directories must be set to owner/group read,write,execute and world read,execute priviledges. The group must be set to "kbo" and the group sticky bit must also be set. Normally, if you create the directory on gryll in the first place, all of these conditions will be met. Directories created on other machines (MIT, KPNO, CTIO, etc.) usually violate one or more of these rules. Always check after bring in outside directories. The following commands illustrate how you set each of these properties.

chmod 775 Refstars --- sets proper read/write/execute bits
chmod g+s Refstars --- sets group sticky bit
chgrp kbo Refstars --- sets proper group name

File permission and owndership.

All files must be set to owner/group read,write and world read priviledges. The group must be set to "kbo". Normally, if you create a file on gryll in the first place, all of these conditions will be met. Files created on other machines (MIT, KPNO, CTIO, etc.) usually violate one or more of these rules. Always check after bring in outside files. The following commands illustrate how you set each of these properties on a group of files.

chmod 664 *.obj --- sets proper read/write/execute bits
chgrp kbo *.obj --- sets proper group name

stay tuned, more to come...