|Space Telescope Science Institute|
|COS Instrument Handbook|
In the following tables, the screening limits in Table 10.1 are converted into V magnitude limits for a variety of sources. These values are not meant to be a substitute for the ETC, but rather an indication of whether a given object may be near the limit. The most sensitive spectroscopic setting and lowest rate limit (global or local) determine the listed values. Stellar spectra are assumed to be unreddened. Table 10.2 corresponds to spectroscopy through the PSA, Table 10.3 through the BOA, and Table 10.4 to NUV imaging for both apertures.
Table 10.2: V Magnitude Limits for PSA Spectroscopy
Table 10.3: V Magnitude Limits for BOA Spectroscopy Table 10.4: V Magnitude Bright-Object Limits for Imaging