grating is used with the NUV-MAMA
and has a relatively high throughput and a resolving power of ~500.
is designed for observations where high spectral resolution is not required, but efficient, spatially resolved spectroscopy with full spectral coverage in the NUV is desired.
Notice that the CCD G230LB
grating mode also covers the NUV with comparable resolution; see Section Comparison of G230LB and G230L
for a detailed comparison of these two grating modes in that wavelength regime.
The top axis displays constant Fλ
values corresponding to the STMAG units (V+STMAGλ
) on the bottom axis. Recall that STMAG=0 is equivalent to Fλ
= 3.63E-9 erg/cm2
/s/Å. The curves are labeled with exposure times in seconds.