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Index

A

absolute flux calibration
FOS 31-22
GHRS 36-12, 37-13
absolute sensitivity
WF/PC-1 45-21
ACCUM mode
FOS 30-38
GHRS, COMB 34-9
GHRS, examining data 35-29
GHRS, STEP-PATT 34-9
accuracy
astrometric, improving 3-10
FOS 32-3
FOS photometric 32-16, 32-17
FOS wavelength 32-16
FOS, pointing 30-28
FOS, target acquisition 32-4
FOS, timing 32-62
GHRS 37-2
HSP data 42-8
WF/PC-1 45-22
ACQ/PEAK
FOS 30-30
acquisition
FOS, assessing 30-26
FOS, binary 30-27
FOS, firmware 30-36
FOS, image 30-33
FOS, peak-up 30-30
FOS, pointing accuracy 30-28
GHRS, assessing 35-19
GHRS, early BRIGHT and FAINT 34-3
GHRS, errors 35-24, 37-28
GHRS, SSA peakup 35-3
mirrors, GHRS 34-7
modes, GHRS 34-11
analog data
HSP 39-3
analog to digital
WF/PC-1 fixup 45-8
analysis
images, general in STSDAS 3-8
spectra, general in STSDAS
3-21
spectra, general tasks in IRAF
3-25
spectra, STIS 3-23
analysis package
image analysis 3-2
aperture throughput correction
FOS 31-21
apertures
FOS 29-9, 29-15
FOS, center 29-11
FOS, target location in 32-2
FOS, wheel non-repeatability 32-6
GHRS 34-3
GHRS, offsets 37-23
apphot package
aperture photometry 3-15
archive 1-1 to 1-24
access to 1-2
documentation 1-3
file names 2-1
FTP data retrieval 1-17
instrument search 1-8
searching 1-5
StarView access software 1-2
world wide web access 1-3
area scans
HSP 40-6
arithmetic
imset, msarith task 3-13
spectra, splot task 3-27
array
FITS table 2-9
astrometry
basic, in STSDAS 3-9
FOS, COSTAR 32-62
improving accuracy 3-10
tasks in STSDAS 3-9

B

background
dark, FOS 32-55
background correction
FOS 31-18
GHRS 36-8, 37-16
inappropriate subtraction, GHRS 37-18
background image
GHRS 35-4
Baum spot
WF/PC-1 43-6
bias level
WF/PC-1 45-8
bibliography
GHRS 34-14
WF/PC-1 43-4
binary acquisition
FOS target acquisition 30-27
binary target acquisition
FOS 29-24, 30-28
blemishes
GHRS detector 37-20
blue detector
FOS 29-7

C

calfos
input files 30-2, 31-5
recalibration 31-26
calhrs task 36-1, 36-16
calhsp task 41-1
calibrated output files
FOS 30-4, 30-6, 30-7, 31-27
calibration
flux, GHRS 37-2
FOS process 31-13
GHRS process 36-1, 36-5
HSP process 41-1
limitations, HSP 42-1
parameters 45-20
reasons to recalibrate 45-12
reference files, FOS 30-2, 30-7, 31-5
reference files, identifying 1-19
reference files, WF/PC-1 45-13
reference tables, HSP 41-6
software, STSDAS 3-1
WF/PC-1 process 45-7
calwfp task 45-7, 45-20
camera configuration
WF/PC-1 43-4
carrousel
errors, GHRS 37-25
grating, GHRS 34-6
catalog
see "archive"
CDBS
FOS reference tables 31-7
HSP reference tables 41-6
chcalpar 45-20
ckwwfpc 45-20
clock error
HSP 42-6
commands
splot cursor 3-28
conversion
counts to flux or magnitude
3-15
flux to wavelength, resample task 3-21
corner diodes
GHRS 34-7
cosmic rays
WF/PC-1 46-6
COSTAR
effect on FOS 29-4, 29-19
effect on GHRS 34-3, 34-10
FOS polarimetry 32-65
LSF, FOS 32-61
PSF, FOS 32-60
PSF, GHRS 38-1
count rate
converting FOS raw counts
31-15
converting GHRS 36-2
counts
flux conversion 3-15
magnitude conversion 3-15
crrej 45-19
CTE file
WF/PC-1 45-9
cursor
splot commands 3-28

D

dark file
WF/PC-1 45-10
data
analysis software, STSDAS
3-1
archive, retrieving files from (see also "archive") 1-1
file names 44-1
proprietary, retrieving 1-3
tape, reading 1-22
data quality files
FOS 30-3
GHRS 35-2, 35-4, 35-7, 37-22, 37-32
HSP 40-3
WF/PC-1 45-12
data quality flags
FOS 30-5
GHRS 37-23
HSP 40-3
WF/PC-1 45-12
data quality initialization
GHRS 36-2
data tapes
FOS 30-1
dataset
GHRS observations 35-1
HSP observations 40-1
retrieving from archive 1-12
see also "imset"
dead diode reference file
GHRS 37-18
dead diodes
FOS 32-53
deadtime correction
HSP 41-2
decontaminations
WF/PC-1 46-2
deconvolution
lucy task 38-4
deflection calibration
GHRS 34-10
delta flats
WF/PC-1 45-18
detectors
blemishes, GHRS 37-20
Digicon 29-7, 34-7
FOS 29-7, 29-11
GHRS 34-7
HSP 39-2
photocathode granularity, GHRS 34-8
Digicon detectors
FOS 29-11
GHRS 34-7
digital data
HSP 39-3
diode response
GHRS 36-3
diodes
centering spectrum on array
37-17
corner, GHRS 34-7
dead, FOS 32-53
dead, GHRS 37-18
flaky, GHRS 37-20
focus, GHRS 34-7
location of image on array, FOS 32-7
noisy, FOS 32-53
science, GHRS 34-7
special diode image, GHRS
35-4
special, GHRS 35-5
disabled diodes
FOS blue detector 31-11
FOS red detector 31-11
disconlab task
position display 3-9
dispersers
FOS 29-11
GHRS 34-5
dispersion coefficients
GHRS 36-18
display
display task 3-4
image 3-4
SAOimage 3-6
spectra 3-17
display task
HSP data 40-5, 40-6
images in STSDAS 3-4
documentation
archive 1-3
FOS 29-2
HSP 39-1
GHRS 34-12
HSP 42-9
IRAF 3-32
STSDAS 3-32
WF/PC-1 43-2
Doppler compensation
GHRS 36-4, 37-24

E

early acquisition
FOS target acquisition 29-24, 30-33
echelle
blaze function, GHRS 37-18
grating, GHRS 34-6
echelle ripple
GHRS 36-12
echelle spectra
echplot task 3-19
echo
HSP data 42-7
echplot task
plot echelle spectra 3-19
engineering data
extracted, GHRS 35-3
FOS 30-15
error sources
FOS, described 32-1
GHRS, summary 37-2
WF/PC-1 46-1
exposure logsheet
FOS 30-24, 30-25
GHRS 35-14
exposure time
FOS observation 33-2, 33-3,
33-5
extended source
photometric correction,
FOS 32-35
photometric correction, GHRS 37-15
extension
file names, see "datasets"
FITS file 2-3
FITS, appending 2-6
WF/PC-1 files 44-2
extinction
GHRS bibliography 34-14
extracted data
GHRS 35-3

F

FGS
single mode, GHRS 35-28
FGW
see "filter-grating wheel"
field of view
WF/PC-1 43-4
file
PostScript, creating 3-20
file names 31-27, 35-2, 40-2, 44-1
file sizes
GHRS 35-5
files
FITS, working with 2-4
GHRS 35-1
naming conventions 2-1
retrieving from archive 1-1 to
1-24
see also "datasets"
see also "reference files"
specifying, STIS 3-18
filter-grating wheel
FOS, non-repeatability 32-6
firmware
FOS target acquisition 29-25, 30-36
FITS
files, working with 2-3 to 2-9
format, described 2-3
GEIS files in 2-11
strfits FITS reader task 1-22
table 2-7
table, array in cell 2-9
tape, files on 1-22
fitting package
fit spectra 3-29
tasks in 3-29
flaky diodes
see "diodes"
flat field
FOS calibration 31-20
FOS, generating 32-44
FOS, gratings 32-46
FOS, inaccuracy in 32-38
FOS, inappropriate 32-43
WF/PC-1 calibration 45-10
WF/PC-1, improving 46-7
flux
calibration, FOS 32-20
calibration, GHRS 37-2
combine with wavelength, mkmultispec 3-21
from counts 3-15
focus
FOS, changes in 32-16
focus diodes
GHRS 34-8
format
archive data retrieval 1-13
FOS
absolute flux calibration 31-22
aperture dilution 32-35
aperture size 29-15
apertures 29-9
binary target acquisition 30-28
calibrated output files 30-4,
31-27
calibration accuracies 32-3
COSTAR 29-4, 29-19
count rate conversion 31-15
data acquisition 29-15
data quality flags 30-5
data quality initialization 31-15
dead diode reference file 32-53
dead diodes 32-53
described 29-1
detector efficiency 29-7
detectors 29-7
disabled diodes 31-11
display spectra 3-17
documentation 29-2, 39-1, 43-2
exposure logsheet 30-25
extended source correction
32-35
FGW motion 32-6
flat field correction 31-20
flat field reference file 32-40
GIM correction 31-16, 32-14
gratings, adjoining 32-37
group parameters 30-9, 30-14
header keywords 30-9
history of 29-4
instrument description 29-4
modes 29-20
noisy diode 32-53
paired aperture calibration anomaly 31-25
paired pulse correction 31-17
paper products 30-15
peak-up target acquisition
30-31
polarimetric calibration 30-42
reference files 30-7, 31-29
sensitivity decline 32-19
sky subtraction 31-20
special mode processing 31-23
spectrophotometry 29-20, 30-38
spectropolarimetry 29-21, 30-42
statistical errors, calculating
31-14
timing accuracy 32-62
target acquisition 32-21
timing, start, stop and exposure length 33-1
wavelength scale 31-21
waveplate 29-12
FP-SPLIT data
GHRS 35-32, 36-19
FTP
archive data retrieval 1-17
fwplot task
spectra display 3-18

G

GEIS format
header file 2-12
working with 2-12
geomagnetically induced motion
see "GIM"
geometric distortion
correction 3-9
GHRS
acquisition assessment 35-19, 37-28
acquisition mirrors 34-7
acquisition modes 34-11
apertures 34-3
calibrated data 35-4
carrousel 34-6, 37-25
catastrophic failure 34-3
corner diodes 34-7
COSTAR 34-10, 38-1
dataset 35-1
deflection calibration 34-10
descriptions 34-3
detector blemishes 37-20
detectors 34-7
diodes, dead 37-18
diodes, focus 34-8
dispersers 34-5
display spectra 3-17
documentation 34-12
Doppler compensation problems 37-24
echelle 34-6
exposure logsheet 35-14
file size 35-5
files in dataset 35-2
flux calibration 37-2
focus diodes 34-8
gratings, wavelength ranges
34-6
header keywords 35-8
instrument history 34-2
jitter 35-23
low-voltage power supply problem 34-3
LSF 38-3
optical path 34-4
paper products 35-9
Phase II proposal 35-1
pipeline calibration 36-2
PSF 38-1
recalibration 36-13
reference files 35-8
return-to-brightest 35-21
SC1 lamp failure 34-3
science data, raw 35-2
science diodes 34-7
side 1 vs. side 2 34-10
spectrum y-balance 34-10
SPYBAL 36-17
target acquisition 34-11, 37-28
timing observations 37-29
wavelength data 34-10
wavelength scale 37-26
zero point offset 36-18
GIM correction
FOS 29-18, 31-16, 32-14
GHRS 37-25
granularity shift
FOS 32-42
grating
carrousel 34-6
cross-dispersing 34-6
echelle 34-6
FOS, overlap 32-37
GHRS, wavelength ranges 34-6
gratings
first-order, GHRS 34-5
GRNDMODE
FOS target acquisition modes 30-38
group
number in image 2-12
parameter, FOS 30-9, 30-14
working with 3-7
grspec task
plot groups 3-18
guide star
acquisition problems 32-5,
35-27
guiding modes
GHRS 35-23

H

hardcopy
see "print" or "paper products"
header
file, GEIS 2-12
keyword, inheritance in FITS
2-6
header data unit
FITS file 2-3
header keywords
FOS 30-9, 31-28
GHRS 35-8
HSP 40-4, 41-2
WF/PC-1 44-1, 44-3
heliocentric correction
FOS 33-6
GHRS 36-13
help
STSDAS and IRAF tasks 3-2
histograms
WF/PC-1 45-11, 45-12
hot diode (see "noisy diode")
32-53
hot pixels
WF/PC-1 46-5
HSP
area scans, displaying 40-6
bogus data 42-7
clock errors 42-6
data echo 42-7
deadtime correction 41-4
displaying data 40-5
file types 40-1
header keyword values 40-4
instrument design 39-2
modes 39-3
orbital period 42-4
prism aperture calibration 42-2
references 42-9
sample time, computing 41-5
timing information 42-1
true count rate, computing 41-4
true photocurrent, computing 41-5
VIS degradation 42-3
Hubble Data Archive
see "archive"

I

icons
used in this manual xiv
igi
plotting with 3-20
printing plots 3-19
image
display 3-4
GEIS file 2-13
plot data, implot 3-10
section 3-7
see also "FITS"
STSDAS tasks 3-2
working with 3-2
IMAGE mode
FOS 30-47
GHRS 34-11
Image Reduction and Analysis Facility
see "IRAF"
image set
see "imset"
imcalc 45-19
imcopy task
FITS files 2-6
imexamine task
image display and plot 3-11
imgtools package
multigroup GEIS images 3-2
implot task
plot image data 3-10
imset
combination, msjoin task 3-14
extraction, mssplit task 3-14
statistics, msstatistics task 3-14
STSDAS tasks for 3-12
imtab task
header to table 3-22
incident angle correction
GHRS 36-11
inheritance
FITS header 2-6
instrument
archive search, specifying 1-8
see "FOS", "GHRS", "HSP" or "WF/PC-1"
interactive target acquisition
FOS 29-24
IPPPSSOOT file names 44-1
IPPSSOOOT
see "files, naming conventions"
IRAF
described 3-1
documentation 3-32
psikern, PostScript 3-20
spectra analysis 3-25
ISRs
see "documentation"

J

jitter
effect on FOS 32-5, 32-22
effect on GHRS 35-23
effect on WF/PC-1 46-12

K

Kelsall's spots
WF/PC-1 43-6
keystroke
commands xiv
keyword
FOS header 30-9, 31-28
GHRS header 35-8
HSP header 40-4
keywords
FITS header 2-6
see also "header"

L

line spread function
FOS 32-61
GHRS 38-3
see "LSF"
lock
false 35-25
loss of 35-26
target, see "acquisition"
log files
GHRS observation 35-7
OMS, GHRSOMS files
see "log files"
logsheet
exposure, GHRS 35-14, 35-34
low-voltage power supply
GHRS, failures 34-2
LSA
see "apertures"

M

magnitude
from counts 3-15
math
see "arithmetic"
measles
WF/PC-1 46-2
mkmultispec task 3-21
modes
see "FOS", "GHRS", "HSP" and "WF/PC-1"
mosaic
WF/PC-1 images 43-6
motion
FOS filter-grating wheel 32-6
spacecraft, GHRS 35-23
msarith task
imset arithmetic 3-13
mscombine task
combine imset 3-13
msjoin task
combine imset 3-14
mssplit task
extract imset 3-14
msstatistics task
imset statitistics 3-14
mstools package
FITS image extenstions 3-2
multispec format
described 3-21

N

naming conventions
files, HST data 2-1
nfit1d task 3-29
ngaussfit task 3-29
NICMOS
imset, STSDAS tasks 3-12
noisy diode
FOS, effect of 32-53
noisy diodes
see "diodes"
north task 43-6

O

observation log file
see "log files"
observed PSF library 46-11
obsum task 37-24
offsets
aperture, GHRS 37-23
OPMODE
FOS data acquisition modes
30-38
optical path
FOS 29-7
GHRS 34-4
OPUS
see "pipeline"
orientation
GHRS 35-29
overscanning
FOS spectra 29-16

P

package
STSDAS, structure 3-2, 3-3
paired pulse correction
FOS 31-17
GHRS 36-3
paper products
FOS 30-15
GHRS 35-9
parameters
calibration, chcalpar 45-20
peak-up
FOS target acquisition 30-30
peak-up target acquisition
FOS 29-24, 30-30, 30-31
PERIOD mode
FOS 30-45, 31-24
Phase II proposal
GHRS 35-1
photocathode centering
FOS 32-22
photocathode granularity
GHRS 34-8
photocathode mapping
GHRS 36-3
photocathode nonuniformity
GHRS 36-4
photocurrent
computing HSP 41-5
photometric accuracy
FOS 32-2, 32-17, 32-18
photometry
basic, in STSDAS 3-15
HSP 39-2
synthetic 3-16
WF/PC-1 46-9
WF/PC-1 keywords 45-11
photon
counting, FOS 29-18
pipeline
files produced by 2-1
see "calibration"
pixel coordinate
converting to RA and Dec 3-9
pixel data
GEIS file 2-13
plate distortion
WF/PC-1 46-13
plot
igi task 3-20
PODPS data quality
see "data quality files"
point spread function
(see also "PSF")
WF/PC-1 46-11
pointing accuracy
FOS 30-28, 32-21
POLARIMETRY mode
FOS 31-24, 32-64
polarizers
FOS 29-12
position
RA and Dec in STSDAS 3-9
PostScript
psikern, IRAF 3-20
power supply
GHRS, low-voltage 34-2
pp_dads task 30-15
preflash
WF/PC-1 45-9
print
plots, igi 3-19
printouts
see "paper products"
prism mode
HSP 42-2
proprietary
data, retrieving 1-3
PSF
FOS 29-19, 32-60
GHRS 38-1
WF/PC-1 46-11, 46-12
psikern
PostScript IRAF kernel 3-20

Q

quality masks (see "data quality files") 40-3
quantum efficiency
FOS 29-7

R

RAPID mode
FOS 29-21, 30-40, 31-23, 33-5
GHRS 35-34
rapid readout
FOS data acquisition 29-21,
30-40
recalibration
GHRS 36-13
reasons to recalibrate 36-13,
45-12
see also "calibration"
WF/PC-1 45-12, 45-20
recentering
GHRS 35-28
red detector
FOS 29-7
reddening 34-14
reference file
FOS background 32-56
location, setting 45-20
reference files
archive retrieval 1-19
determining best 36-15, 45-14
FOS 31-29
FOS calibration 30-7, 31-5
GHRS 35-8, 36-16
identification of 1-19
see also "calibration"
WF/PC-1 44-3
reference tables
calhrs 36-15
calhsp, required 41-6
FOS 31-7
REPEAT observation
combining with FP-SPLIT, GHRS 36-19
resample task
flux to wavelength 3-21
return-to-brightest
GHRS 35-3, 35-21
routine science data process
see "calibration"
RSDP
FOS calibration pipeline 31-1
GHRS calibration pipeline 36-1
HSP calibration 41-1
pipeline calibration 36-2, 45-1

S

sample time
HSP 41-5
SAOimage
display image 3-6
saturated pixels
WF/PC-1 45-7
saturation
FOS detector electronics 31-17
SC1 lamp
GHRS, failure 34-3
scattered light
FOS 31-19, 32-58
WF/PC-1 46-2
science data
FOS 30-2, 30-4
GHRS 35-2
HSP 40-3
science diodes
GHRS 34-7
science header line
FOS 30-2
science trailer line
FOS 30-3
search patterns
GHRS acquisitions 35-19
searching
archive, search criteria 1-7
section
image 3-7
sensitivity
functions, GHRS 37-2
long-term changes, GHRS
37-14
monitoring, GHRS 37-7
sgraph task
plot group 3-18
plot STIS spectra 3-18
sky subtraction
FOS 31-20
software
STSDAS 3-1
Space Telescope Science Data Analysis System
see "STSDAS"
spacecraft motion
GHRS 35-23
spatial scan
GHRS 35-36
specalign task 35-32
specfit task
fit models to spectrum 3-32
special mode processing
FOS 31-23
spectra
analysis tasks,IRAF 3-25
analysis, STSDAS 3-21
analysis, tasks in STSDAS 3-26
display 3-17
display, STIS 3-18
fitting 3-29
locating, FOS 32-7
specfit task 3-32
spectrophotometry
FOS data acquisition 29-20,
30-38
FOS time-resolved 29-21, 30-45
FOS, errors 32-36
spectropolarimetry
FOS data acquisition 29-21,
29-22
, 30-42, 30-47
spectrum
shape, GHRS 37-16
spectrum y-balance
GHRS 34-10, 36-17
splot task
cursor commands 3-28
plot spectra 3-27
SSA
see "apertures"
standard header package
HSP 40-2
standard header packet
FOS 30-3
GHRS 35-3
standard stars
GHRS flux 37-3
start time
FOS observation 33-1
StarView
archive software 1-2
command usage 1-5
dataset retrieval 1-12
search criteria, range 1-8
WF/PC-1 reference files 45-14
static mask
WF/PC-1 45-7
statistical error
GHRS 35-4
statistical errors
FOS 31-14
stepping pattern
GHRS, properties 35-6
STIS
analysis, preparing 3-23
display spectra 3-18
echelle spectra, plotting 3-19
imset, STSDAS tasks for 3-12
strfits task 1-22
STSDAS 3-1 to 3-33
astrometry 3-9
astrometry in 3-9
calibration routines 45-3
documentation 3-32
image analysis tasks 3-12
image display 3-4
image, display 3-7
image, section 3-7
images 3-2
imset tasks 3-12
organization of 3-1, 3-3
photometry in 3-15
spectra analysis tasks 3-26
synthetic photometry 3-16
tables 3-2
substepping
FOS spectra 29-16
merging bins, GHRS 36-7
suffix
see "datasets"
switches (see "keyword," "calibration," or "header")
synphot
WF/PC-1 absolute sensitivity 45-22
synphot package
synthetic photometry 3-16
synthetic photometry
see "synphot"

T

table
FITS 2-7
STSDAS 3-2
tape
data, reading 1-22
target acquisition
binary, FOS 30-27
FOS 29-22, 29-24, 30-26
GHRS 34-11, 37-28
peak-up, FOS 30-31
the 33-1
thermal breathing
effect on focus 32-15
time
FOS header information 33-2
FOS start and stop 33-1
time correction
FOS 31-23, 32-62, 33-5
time variability
FOS 32-19
GHRS 37-29
HSP 42-1
time-resolved spectrophotometry
FOS 30-46
tomultipsec task
extract STIS spectral orders
3-23
trailer file
GHRS 35-4
transformation
pixel coordinates to RA and Dec 3-9
true count rate
HSP 41-4
ttools 45-13
ttools package
STSDAS tables 3-4
txtable task
extract arrays 3-25
typographic conventions
in this manual xiv

U

unique data log
FOS 30-3, 30-6
GHRS 35-3
HSP 40-2
unit
counts to flux/mag, conversion 3-15

V

vacuum wavelength scale
FOS 31-21
GHRS 36-13
VAX (see "VMS")
vignetting
removal, GHRS 36-4, 37-4
visual detector
HSP 42-3

W

warning
types in this document xv, 32-4
wavecal task 36-18
wavelength
combine with flux, mkmultispec 3-21
GHRS 36-7
GHRS data 34-10
wavelength accuracy
FOS 32-16
wavelength calibration
FOS 29-14, 32-49
GHRS 36-17, 36-18, 37-23
wavelength scale
FOS 31-21
GHRS 37-31
wavelength solution
GHRS 35-4
waveplate
FOS 29-12
WF/PC-1
absolute sensitivity 45-21
calibration 45-1
cosmic rays 46-6
data acquisition 43-4
data analysis 46-1
data quality 45-12
data quality flags 45-12
decontamination effects 46-2
delta flats 45-18
error sources 46-1
field of view 43-4
header keywords 44-3, 44-4
hot pixels 46-5
instrument description 43-3
jitter 46-12
measles 46-2
mosaic detector images 43-6
photometry 46-9
plate distortion 46-13
PSF 46-11
readout modes 43-4
reference files 44-3
scattered light 46-2
WFPC2
absolute sensitivity 45-21
wmosaic task 43-6
World Coordinate System
mkmultispec task 3-21
world wide web
archive access 1-3
WWW page
FOS 29-3, 39-2, 43-2

X

xstarview
see "StarView"
xy2rd task
pixel coordinates to RA and Dec 3-9

Y

y-base unit
FOS 29-12, 32-7
FOS uncertainty 32-8

Z

zero order photometry
FOS 33-7
zero point offset
GHRS 36-18


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