Specifications for FUSE Selections for Scrapbook

Permitted Observing Configurations:

Single observing configuration except in rare cases (see Comments).

Ranked Observing Configurations In rare instances, an object may be observed in two different instrument apertures at different times. In such cases precedence is given to the observation observed in the largest aperture (generally, LWRS).

Problems:

The appearance of "worms," or vignetting of portions of spectrum may occasionally be seen in the continuum. FUSE continua are flatfielded but not corrected for such problems in pipeline processing.
Target selection is limited by detector and computer storage constraints. Observations at low declinations are infrequently made due to guiding constraints imposed using the magnetic torque bars for attitude control of the spacecraft, and also due to effects of ram-pressure from the Earth's atmosphere.

Specifications for selected representative dataset:

Generally, select dataset with highest exposure time (accumulated counts) and the largest arperture. Occasionally, one exposure was "hand picked" out of several for an extended emission region, and a few of these might violate the exposure time criterion.

Comments:

In rare cases (for a few bright stars) only the LIF channels of the instrument were utilized in the observations. This contingency does not affect our selection of a particular observation since the loss of the SiC channels should extend to all observations of such targets.