Chapter 13:
Spectroscopic Reference Material

13.1 Introduction

13.2 Using the Information in this Chapter

13.2.1 Grating Parameters

13.2.2 Wavelength Ranges

13.2.3 Grating Sensitivities and Effective Areas

13.2.4 Signal-to-Noise Plots

13.3 Gratings

FUV Grating G130M

FUV Grating G130M with CENWAVE=1222

FUV Grating G130M with CENWAVE=1055 or 1096

FUV Grating G160M

FUV Grating G140L

NUV Grating G185M

NUV Grating G225M

NUV Grating G285M

NUV Grating G230L

13.4 Spectrograph Design Parameters

13.4.1 FUV Channel

13.4.2 NUV Gratings

13.5 The Location of COS in the HST Focal Plane

13.6 The COS User Coordinate System