ACS Insturment Handbook for Cycle 24

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Index

A

AB(nu) 164, 183, 227

Aberration Correction 15

ABMAG 183

ACCUM mode

SBC 129

WFC 127

Apertures

available-but-unsupported 117

coronagraph/acqs 141

HRC 140, 141

ramps 135, 139

SBC 141

small filters 137

WFC 127, 133

A-to-D Converter

WFC 127

B

Bandpass 55, 185

BOP

screening 125

solar system objects 125

Bright Object Protection 52

global limit 52, 121

limiting V magnitudes 120

local limit 52, 121

policy 126

global limit table 121

parallels 126

Phase I 122

Phase II 122

safety 53

Buffer

internal memory 18

overheads 128

SBC 129

SBC 16 bit 48

C

CALACS 74

Calibration

accuracies 20

lamps 17

non-science exposures/GO obtained 118

CCDs

HRC. See HRC

WFC. See WFC

Charge Transfer Efficiency 42

parallel measurement/table 42

serial measurement/table 42

utilizing POS TARGS 119

Coordinated Parallels 148

Cosmic Rays

CR-splitting 39

HRC 40

WFC 40

Count Rate Limits

SBC 45, 52

CR-SPLIT 130, 153

CTE 42

CTE Considerations 8

D

Dark Current

SBC 45

Data Number (DN) 27, 127

Data Storage

buffer dumps 18, 128

buffer size 18

data transfer rate/overheads 18

data volume 118

Detectors

SBC. See SBC

WFC. see WFC

Dithering

cosmic rays 39

goals 129

E

Earthshine 171, 179

Encircled Energy

models 73

Exposure Time Calculations

ETC 160

examples 174

sky backgrounds 179

Exposures

minimum/maximum exposure time 129

overheads 153

Extinction 173

F

Field of View (FOV)

HRC 140

ramps 135

SBC 141

WFC 133

Filter Wheel

SBC 17

WFC/HRC 17

Filters 20, 160

HRC/F220W 198, 199

HRC/F250W 200

HRC/F330W 201

HRC/F344N 202

HRC/F435W 203

HRC/F475W 204

HRC/F502N 205

HRC/F550M 206

HRC/F555W 207

HRC/F606W 208

HRC/F625W 209

HRC/F658N 210

HRC/F660N 211

HRC/F775W 212

HRC/F814W 213

HRC/F850LP 214

HRC/F892N 215

HRC/G800L 216

HRC/PR200L 217

Johnson-Cousins 65

narrow-band 65

Ramp Filters

WFC 65

SBC Summary Table 57

SBC/F115LP 219

SBC/F122M 220

SBC/F125LP 221

SBC/F140LP 222

SBC/F150LP 223

SBC/F165LP 224

SBC/PR110LP 225

SBC/PR130LP 226

Sloan Digital Sky Survey 65

WFC/F435W 185

WFC/F475W 186

WFC/F502N 187

WFC/F550M 188

WFC/F555W 189

WFC/F606W 190

WFC/F625W 191

WFC/F658N 192

WFC/F660N 193

WFC/F775W 194

WFC/F814W 195

WFC/F850LP 196

WFC/G800L 197

WFC/HRC Summary Table 56

Fringing 26

G

Geocoronal emission 172

Geometric Distortion

PSF 73

temporal changes 130

WFC 65

H

Hot Pixels

creation rate table 38

data quality array 40

dither pattern 40

shot noise 39

spontaneous healing 40

warm pixels definition 37

HRC

apertures 140

coating 25

dark count 19

detector architecture 14

field of view 19

fringing 26

multiple electron events 44

operating temperature 19

Performance Characteristics Table 19

physical overscan 27

pixel size 19

plate scale 19, 147

point spread function 73

QE hysteresis 26

quantum efficiency 19

ramp filters 129, 136

read noise 19

readout 27

virtual overscan 27

I

Imaging

anomalies 119

BOP 120

limiting magnitude 61

saturation 63

SBC detector 69

signal-to-noise 63

WFC detector 64

Imaging caveats 59

filters see filters 59

L

Lamps

deuterium 17

tungsten 17

Light Paths 16

Limiting Magnitudes 61

Linearity

SBC 52

LOW-SKY 172, 175

M

MAMA. See SBC

Memory.See Buffer

O

Optical Path

HRC/SBC 16

WFC 16

Optics

coronagraph 15

corrective optics 15

fold mirror 15

HRC/SBC 15

spherical aberration 15

WFC 15

Orientation

computing 143

ORIENTAT 144

PA_APER 144

Overheads

buffer dumps 128, 153

buffer size 153

examples 154

guide star ACQ/reACQ 152

observatory level 151

readout 152

science exposure level 153

spectroscopy 153

subarrays 154

table 152

target acquisition 152

P

Parallel Observations

APT 147

coordinated parallels 148

pointing 147

pure parallels 148

SBC in parallel 126

Patterns 129

Phase I

bright object limits 122

preparation 3, 113

Photometry

encircled energy 73

Plate Scale 130, 147

Polarimetry

filters 86

PSF

encircled energy 73

geometric distortion 73

HRC 73

models 72

pixel response function 71

residual aberrations 79

undersampling 65

WFC 73

Q

Quantum Efficiency Hysteresis 26

R

Ramp Filters

aperture location 129

apertures 135

Readout Time 152

Red Leaks

SBC 70

S

Saturation

SBC 48

SBC

ACCUM mode 44, 129

apertures 141

BOP 126

buffer 129

characteristics 45, 69

flat field 51

global count rate 52

limiting count rates 53

local count rate 52

MAMA detector

non-linearity 52

optical path 16

physical description 14

plate scale 19

policy 15, 126

PSF 47

red leaks 70

repeller wire 44

signal to noise limitation 50

spectral response 46

Scheduling

SBC considerations 48

Sensitivity

HRC/G800L 105

HRC/PR 200L 106

WFC/G800L 103, 104

Signal-to-Noise 166

sky background 179

Solar System Objects 125

South Atlantic Anomaly 48

Spectroscopy

HRC 104

SBC 107

WFC 102

STIS 48

Subarrays

data volume 128

overscan 128

T

Target ACQ

accuracy 17

aperture 17

ramp filters 17

Tiny TIM 72

Transmission Curves

broad-band filters 57

medium-band filters 58

narrow-band filters 58

SBC filters 58

SDSS filters 57

W

WFC

ACCUM 127

apertures 127, 133

characteristics 64

dark count 19

detector architecture 14

field of view 19

fringing 26

full width half maximum (FWHM) 64

gain 127

operating temperature 19

Performance Characteristics Table 19

pixel size 19

plate scale 19, 147

point spread function 73

QE hysteresis 26

quantum efficiency 19

ramp filters 129, 135

read noise 19

readout 26

virtual overscan 26

Z

Zodiacal Light 179