Space Telescope Science Institute
STIS Instrument Handbook
help@stsci.edu
Table of Contents Previous Next Index Print


Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Glossary

Glossary
The following terms and acronyms are used in this Handbook.
 
A-D: Analog to Digital
ACS: Advanced Camera for Surveys
ABMAG: –2.5 log (Fν) – 48.60 where Fν is the flux from the source in erg/cm2/s/hz
APT: Astronomer’s Proposal Tool
BOP: Bright-Object Protection
CALSTIS: STIS calibration pipeline software
CCD: Charge Coupled Device. Solid-state, light detecting device
CDBS: Calibration Data Base. System for maintaining reference files and tables used to calibrate HST observational datasets.
CIM: Calibration insert mechanism
CP: Call for Proposals
CR: Cosmic ray
CR-SPLIT: Division of a CCD exposure into shorter exposures to be used for cosmic ray rejection
CTE: Charge Transfer Efficiency
CTI: Charge Transfer Inefficiency
CVZ: Continuous Viewing Zone
DQ: Data Quality
DN: Data Number
ETC: Exposure Time Calculator. ETCs are Web based tools which can be accessed through the STIS webpages.
ERO: Early Release Observations
FAQ: Frequently Asked Questions
FGS: Fine Guidance Sensors
FITS: Flexible Image Transport System. A generic IEEE and NASA defined standard file format used for storing image data.
FOC: Faint Object Camera
foible: Peculiarities in the STIS data, usually caused by the data processing software. Data foibles are posted on the STIS webpages.
FOS: Faint Object Spectrograph
FOV: Field of View
FSW: Flight Software
FTP: File Transfer Protocol. Basic tool used to retrieve files from a remote system. Ask your system manager for information about using FTP.
FUV: Far ultraviolet (~912-2000 ┼)
FWHM: Full Width at Half Maximum
GEIS: Generic Edited Information Set. Multigroup format used by STSDAS for storing some HST image data.
GHRS: Goddard High-Resolution Spectrograph
GO: General Observer
GSC: Guide Star Catalog
GTO: Guaranteed Time Observer
HDA: Hubble Data Archive
Help Desk: Facility for getting help on HST related topics via email. help@stsci.edu.
HITM: Hole in the Mirror
HSP: High-Speed Photometer
HST: Hubble Space Telescope
HUT: Hopkins Ultraviolet Telescope
ICD: Interface control document. Defines data structures used between software or systems to ensure compatibility.
IDT: Instrument Definition Team
IHB: Instrument Handbook
IR: Infrared
IRAF: Image Reduction and Analysis System. The environment in which şSTSDAS operates.
IS: Instrument Scientist
ISR: Instrument Science Report
IUE: International Ultraviolet Explorer
K: Degree Kelvin
LMC: Large Magellanic Cloud
LSF: Line spread function
MAMA: Multi-Anode Microchannel Array
MCP: Microchannel Plate
MSM: Mode-Selection Mechanism
ND: Neutral density
NICMOS: Near-Infrared Camera and Multi-Object Spectrograph
NUV: Near ultraviolet (~2000-4000 ┼)
OSS: Observation Support System
OTA: Optical Telescope Assembly
OTFR: On-the-Fly Re-processing
PC: Program Coordinator
Peakdown: Movement of a target along a slit to center it under an occulting bar.
Peakup: Movement of a target in one or both directions to center it in a slit.
Phase I: A proposal for observing time on HST
Phase II: An approved HST proposal; includes precise detail of how program is to be executed
PI: Principal investigator
PSF: Point-spread function.
QE: Quantum efficiency
QEH: Quantum efficiency hysteresis
QPOE: Quick Position-Oriented Event (IRAF data format for x-ray data)
QSO: Quasi-stellar object
RA: Right ascension
reference file: Data file containing STIS parameters or calibration information which is used by the pipeline
rms: Root mean square
SAA: South Atlantic anomaly
SIM: Space Interferometry Mission
SITe: Scientific Image Technologies; company that designed the STIS CCD
SMOV: Servicing Mission Observatory Verification
S/N: Signal-to-noise ratio
ST-ECF: Space Telescope European Coordinating Facility
STAN: Space Telescope Analysis Newsletter
STIS: Space Telescope Imaging Spectrograph
STMAG: STScI magnitude system; –2.5 log (Fλ) –21.10 where Fλ is the flux from the source in erg/cm2/s/┼
STScI: Space Telescope Science Institute
STSDAS: Space Telescope Science Data Analysis System. The complete suite of IRAF data analysis and calibration routines used to process HST data.
SV: Science verification. Process of taking observations that can be used for HST instrument calibration.
synphot: STSDAS synthetic photometry (IRAF) software package
TAC: Telescope Allocation Committee
TAS: Target Acquisitions Simulator; software available on the Web
TDS: Time-dependent Sensitivity
TIR: Technical Instrument Report
URL: Uniform resource locator. Address for websites.
UV: Ultraviolet
WF/PC: Wide Field/Planetary Camera
WFPC2: Wide Field Planetary Camera-2. Replacement for WF/PC installed during first servicing mission of December 1993.
WWW: World Wide Web.

Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 22 > Glossary

Table of Contents Previous Next Index Print