COS Instrument Handbook for Cycle 24

help@stsci.edu

Index

A

ACCUM mode 1, 2

Doppler correction

pulse-height data

acquisitions 1, 2, 3

ACQ/IMAGE

ACQ/PEAKD

ACQ/PEAKXD

ACQ/SEARCH

spiral pattern

centering accuracy and photometry

early (preliminary images)

exposure time

dispersed-light

imaging

extended or multiple targets

offset target

overhead times

recommended parameters (table)

airglow - see background rates

airglow emission - see background rates

apertures 1, 2

BOA

FCA

PSA

table

WCA

ApM - see mechanisms, ApM

B

background rates 1, 2

airglow 1, 2

detector

Earthshine

geocoronal

Moon

second-order light

tables

zodiacal light 1, 2

BOA - see apertures, BOA

bright-object protection 1, 2

BUFFER-TIME estimation

C

calibration accuracies

calibration observations

Cycle 17 1, 2

Cycle 18

Cycle 19

Cycle 20

Cycle 23

FUV lifetime positions

ground testing

SMOV

Cardelli extinction model

COS

compared to STIS 1, 2

focal plane schematic

optical design 1, 2

team members

Cycle 17 calibration observations 1, 2

Cycle 18 calibration observations

Cycle 19 calibration observations

Cycle 20 calibration observations

Cycle 23 calibration observations

D

dark rate 1, 2

data products 1, 2

dead time

FUV

NUV

detector non-linear effects - see dead time

detector plate scale

Doppler correction

ACCUM mode

TIME-TAG mode

E

Earthshine - see background rates

effective area

FUV point source

NUV imaging

NUV point source

ETC 1, 2

examples

observing sequences 1, 2

using the ETC 1, 2

exposure time

acquisitions

dispersed-light

imaging

estimating with ETC 1, 2

valid values

wavecal exposures

Exposure Time Calculator - see ETC

EXTENDED optional parameter

extinction

Cardelli model

F

FCA - see apertures, FCA

flat-field quality

flux precision

FP-POS optional parameter

Frequently-Asked Questions

FUV channel

detector 1, 2

bright-object protection procedures

characteristics (table)

count-rate limits

dark rate 1, 2

dead time

dead-time constant

format

gain sag

photocathode

pulse-height distribution

quantum efficiency

segment gap coverage

sensitivity adjustments

single-segment observations

stim pulses

walk effect

effective area

grating parameters

lifetime positions

calibration

optical design

spatial variation of dark rate

wavelength settings and ranges

G

G130M grating

CENWAVE=1055 or 1096

CENWAVE=1222

G140L grating

G160M grating

G185M grating

G225M grating

G230L grating

G285M grating

Gain sag

Galactic extinction - see extinction

grating parameters

ground testing

H

HST

apertures and focal plane 1, 2

wavefront errors

I

Instrument Development Team (IDT) members

L

line-spread function 1, 2

M

mechanisms

ApM

OSM1

OSM2 1, 2

shutter

MIRRORA

MIRRORB

N

Number_of_Iterations optional parameter

NUV channel

detector 1, 2

bright-object protection procedures

characteristics (table)

count-rate limits

dark rate 1, 2

dead time

dead-time constant

format

MAMA properties

photocathode

point-spread function

quantum efficiency

spectral gap coverage

effective area

grating parameters

imaging 1, 2

optical design

vignetting

wavelength settings and ranges

O

OSM1 - see mechanisms, OSM1

OSM2 - see mechanisms, OSM2

overhead times 1, 2

acquisitions

first-exposure adjustment

generic observatory times

OSM1 movements

OSM2 movements

Phase I estimates

science exposures

P

photometric precision

plate scale - see detector plate scale

point-spread function 1, 2

of NUV MAMA

PSA - see apertures, PSA

pulse-height distribution

R

resolution

imaging

spatial

spectroscopic 1, 2

(table)

temporal (TIME-TAG mode)

resolution element (resel)

resolving power

S

Scattered light, internal

second-order light

SEGMENT optional parameter

sensitivity

shutter - see mechanisms, shutter

signal-to-noise ratio

estimating

improving

plots

see also exposure time, estimating

SMOV calibration observations

SNAP programs

spectrograph design parameters 1, 2

spectroscopic modes - see grating parameters

stim pulses

STIS compared to COS 1, 2

STMAG system

STScI Help Desk

T

TAGFLASH

exposure durations

target acquisitions - see acquisitions

TIME-TAG mode 1, 2

BUFFER-TIME estimation

Doppler correction

pulse-height data

U

units and conventions

User Support

W

wavecal - see wavelength calibration

wavelength accuracy

specifications

wavelength calibration 1, 2

AUTO

TAGFLASH

user-specified

wavelength settings and ranges (table)

wavelengths, units and convention

WCA - see apertures, WCA

X

XDL - see FUV channel

Z

zodiacal light - see background rates