Typographic Conventions

To help you understand the material in this Data Handbook, we will use a few consistent typographic conventions.

Visual Cues

The following typographic cues are used:

  • bold words identify a PYTHON library or function.
  • typewriter-like words identify a file name, system command, or response that is typed or displayed. typewriter-like words also identify header keywords.
  • italic type indicates a new term, an important point, a mathematical ­variable, or a task parameter.
  • ALL CAPS identifies a table column.

Comments

Occasional side comments point out three types of information, each identified by an icon in the left margin.

Warning: You could corrupt data, produce incorrect results, or create some other kind of severe problem.

Heads Up: Here is something that is often done incorrectly or that is not ­obvious.

Tip: No problems... just another way to do something or a suggestion that might make your life easier.

Information especially likely to be updated on the WFC3 Web site is indicated by this symbol.

List of Acronyms 

Acronym


A-to-D

Analog to Digital conversion

ACQ

Acquisition

ACS

Advanced Camera for Surveys

ADC

Analog-to-Digital converter

APT

Astronomer's Proposal Tool

CASTLE

HST optical simulator

CSM

Channel Select Mechanism

CT

Crosstalk

CTE

Charge Transfer Efficiency

CVZ

Continuous Viewing Zone

DN

Data Number

DQ

Data quality

DS9

SAOimage astronomical image visualization application

ESA

European Space Agency

ETC

Exposure Time Calculator

FGS

Fine Guidance Sensor

FITS

Flexible Image Transport System

FOV

Field of View

FSM

Filter Select Mechanism in WFC3 IR channel

HOPR

Hubble Operations Problem Report

IDC

Image distortion correction

IR

Infrared channel on WFC3

IRAF

Image Reduction and Analysis Facility

ISR

Instrument Science Report

MAST

Mikulski Archive for Space Telescopes

MULTIACCUM

Accumulation mode (multiple non-destructive reads)

NICMOS

Near Infrared Camera and Multi-Object Spectrometer

OPUS

Operational Pipeline Unified System

OS

Optical Stimulus

OTA

Optical Telescope Assembly

PAM

Pixel Area Map

POM

Pick-off Mirror

PSF

Point Spread Function

QE

Quantum efficiency

SAA

South Atlantic Anomaly

SED

Spectral Energy Distribution

SIC&DH

Science Instrument Command and Data Handling unit

SIP

Simple Image Polynomial

SMOV

Servicing Mission / Orbital Verification

SOFA

Selectable Optical Filter Assembly in WFC3 UVIS channel

ST-ECF

Space Telescope - European Coordinating Facility

STScI

Space Telescope Science Institute

STSDAS

Space Telescope Science Data Analysis Software

TIR

Technical Instrument Report

TV3

Thermal Vacuum campaign 3

UVIS

Ultraviolet-Visible channel on WFC3

WCS

World Coordinate System

WF/PC-1

Wide-field Planetary Camera 1, on-board HST Apr 1990 to Nov 1993

WFPC2

Wide-Field Planetary Camera 2, on-board HST Dec 1993 to May 2009