Legacy Instruments

The instruments which had previously flown on HST but had been replaced by more modern detectors are included here for completeness.

FOC

The FOC keywords consist of a list of detectors, filters, and miscellaneous keywords. The f/48 detector has 2 filter wheels and the f/96 detector has 4. Some of the filters have aliases. For instance, fuvop is an alias for prism1, nuvop for prism2, fopcd for prism3, g450m for F305LP, g225m for F220W, and g150m for F140W. The miscellaneous keywords include the COSTAR and the occulting fingers. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('foc,costar,f/96,f410m')  

Description

Keywords

Detector

f/48 f/96 f/288 spec

f/48

Wheel 1

f140w (g130m) f150w (g150m) f175w f195w f220w (g225m) f305lp (g450m) prism3 (fopcd) (grat-prism)

Wheel 2

f130lp f180lp f275w f342w f430w prism1 (fuvop) prism2 (nuvop)

f/96

Wheel 1

f600m f630m f2nd f4nd f6nd f8nd pol0 pol0_par pol0_per pol0_unp pol60 pol60_par pol60_per pol60_unp pol120 pol120_par pol120_per pol120_unp prism1 (fuvop) prism2 (nuvop)

Wheel 2

f140w f175w f220w f275w f320w f342w f370lp f430w f480lp f486n f501n

Wheel 3

f120m f130m f140m f152m f165w f170m f190m f195w f210m f231m f1nd

Wheel 4

f130lp f253m f278m f307m f346m f372m f410m f437m f470m f502m f550m

Image Format

f/48

x48n256 x48n256d x48n512 x48nlrg x48zlrg x48zrec

f/96

x96n128 x96n256 x96n512 x96nlrg x96z512 x96zlrg

Spectral Order

order1 order2 order3 order4

Occulting FIngers

occ0p23 occ0p4 occ0p8

Detector Format

x48n256 x48n256d x48n512 x48nlrg x48zlrg x48zrec x96n128 x96n256 x96n512 x96z512 x96nlrg x96zlrg

Note that the spectroscopic capabilities, and hence the related keywords spec, order1, order2, order3, and order4, are only available for the f/48 camera. Furthermore, the occ0p23 keyword is only available with the f/48 camera, and the occ0p4 and occ0p8 keywords are only available with the f/96 camera.

The x48* and x96* keywords are used to account for the known dependency of DQE on the detector format (see the FOC Instrument Handbook for more details). These keywords invoke throughput tables that contain the (wavelength-independent) relative sensitivities for each format, where the 512x512 format (x48n512 and x96n512) is set to 1.0. The associations between formats and keywords are listed below.

Camera

Keyword

Camera Format

f/96

x96n128

128 x 128

x96n256

256 x 256

x96n512

512 x 512

x96z512

512z x 512

x96zlrg

512z x 1024

f/48

x48n256

256 x 256

x48n512

512 x 512

x48zrec

256z x 1024

x48nlrg

512 x 1024

x48zlrg

512z x 1024

FOS

The FOS keywords consist of a list of detectors, apertures, gratings, and polarimeter waveplates and waveplate position angles. COSTAR keyword is also accepted. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('fos,costar,blue,g160l')  

The waveplate keywords indicate whether Waveplate A or B is being used and the angle of the waveplate. The waveplate keyword syntax is POLpa-wp, where pa is the position angle in degrees, and wp is the A or B waveplate:

>>> bp = stsyn.band('fos,blue,g130h,pol135-a')  

The upper and lower aperture keywords are only recognized when used in conjunction with one of the paired apertures:

>>> bp = stsyn.band('fos,blue,g130h,upper,1.0-pair')  

The order0 keyword is only available in conjunction with the g160l grating and the blue detector:

>>> bp = stsyn.band('fos,blue,g160l,order0')  

Description

Keywords

Detector

blue red

Aperture

0.3 0.5 1.0 4.3 0.1-pair 0.25-pair 0.5-pair 1.0-pair upper lower 0.25x2.0 0.7x2.0-bar 2.0-bar blank failsafe

Grating

g130h g190h g270h g400h g570h g780h g160l g650l mirror prism order0

Waveplate

pol0-a pol0-b pol22.5-a pol22.5-b pol45-a pol45-b pol67.5-a pol67.5-b pol90-a pol90-b pol112.5-a pol112.5-b pol135-a pol135-b pol157.5-a pol157.5-b pol180-a pol180-b pol202.5-a pol202.5-b pol235-a pol235-b pol257.5-a pol257.5-b pol270-a pol270-b pol292.5-a pol292.5-b pol315-a pol315-b pol337.5-a pol337.5-b

GHRS

The GHRS keywords consist of a list of detectors, apertures, gratings or mirrors, and Echelle mode orders. COSTAR keyword is also accepted. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('hrs,costar,lsa,g160m')  

The Echelle mode orders are used with the keywords echa and echb. Orders 18 to 33 are valid with Echelle mode B, while orders 33 to 53 with mode A. For example:

>>> bp = stsyn.band('hrs,costar,lsa,echa,33')  

Description

Keywords

Aperture

lsa ssa

Grating

echa echb g140l g140m g160m g200m g270m

Mirror

a1 a2 n1 n2

Echelle Order

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 all

HSP

The HSP keywords consist of a list of detectors, filters, apertures, and beams. The beams refer to the two beams that come out of the beam splitter. Not all apertures can be used with all detectors; Refer to the HSP Instrument Handbook for further information. The polarization detector also has angle and type keywords. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('hsp,uv1,f220w,c')  

Description

Keywords

Detector

pmt pol uv1 uv2 vis

Relay mirror

norelay relay

Aperture

a b c d e f h j s t

Beam

blue red

Filter

POL

f160lp f216m f237m f277m f327m

UV1

f122m f135w f140lp f145m f152m f184w f218m f220w f240w f248m f278n prism

UV2

f122m f140lp f145m f152m f160lp f179m f184w f218m f248m f262m f278n f284m prism

VIS

f160lp f184w f240w f262m f355m f400lp f419n f450w f551w f620w prism

Polarization

Angle

0 45 90 135

Type

ext ord par per

WF/PC-1

The WF/PC-1 keywords consist of a list of filters, detectors, and miscellaneous keywords. The cal keyword accounts for the flat-field correction. The cont# keyword accounts for changes in sensitivity between decontamination events.

WF/PC-1 has 12 independently positionable filter wheels, each of which has 5 positions, including a “clear” position. Detectors 1-4 correspond to the Wide Field Camera; They are only valid when used in conjunction with the wf, wfc, or wfpc keywords. Meanwhile, Detectors 5-8 correspond to the Planetary Camera; They are only valid when used with the pc keyword. If a detector number is not specified, the default detector for wf is 2, and pc is 6.

For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('wfpc,4,f194w,dn')  

Decription

Keywords

Instrument

wfpc wfc wf (all equivalent) pc

Detector

1 2 3 4 5 6 7 8

Filter Wheel

1

f673n f8nd g450 g800

2

f122m f336w f439w g200 g200m2

3

pol0 pol60 pol120 f1083n

4

f157w f194w f230w f284w

5

f569w f658n f675w f791w

6

f631n f656n f664n f702w

7

f375n f437n f502n f588n

8

f368m f413m f492m f622w

9

f547m f555w f648m f718m

10

f785lp f814w f875m f1042m

11

f128lp f469n f487n f517n

12

f606w f725lp f850lp f889n

ADC gain

dn

Baum spot

baum

Decontamination

cont#

Flat-field

cal

WFPC2

The WFPC2 keywords consist of a list of detectors, filters, ADC gain, and miscellaneous keywords. The cal keyword accounts for the flat-field response. Meanwhile, the cont# keyword accounts for changes in throughput between decontamination events; Due to the removal of WFPC2 during SM4, this time-dependent effect is only valid for dates prior to SM4.

WFPC2 has 12 filter wheels, each of which has 5 positions, including the “clear” position. Wheel 11 contains quad filters, while Wheel 12 contains linear ramp filters. Detector 1 is the Planetary Camera. Meanwhile, Detectors 2-4 correspond to the Wide Field Camera. If a detector is not specified, the default is Detector 4.

For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('wfpc2,2,f450w,a2d7,cont#50180')  

Description

Keywords

Detector

1 2 3 4

Filter Wheel

1

f122m f157w f160bw f953n

2

f130lp f165lp f785lp f850lp

3

f336w f410m f467m f547m

4

f439w f569w f675w f791w

5

f343n f375n f390n f437n

6

f469n f487n f502n f588n

7

f631n f656n f658n f673n

8

f170w f185w f218w f255w

9

f300w f380w f555w f622w

10

f450w f606w f702w f814w

11

f1042m fquvn fquvn33 fqch4n fqch4n33 fqch4n15 fqch4p15 polq polq_par polq_perp polqn33 polqn18 polqp15

12

lrf#

ADC gain

a2d7 a2d15

Decontamination

cont#

Flat-field

cal

Quad Filter

Filter Wheel 11 contains 3 specialized quadrant (quad) filters. Each quadrant corresponds to a facet of the pyramid, and therefore to a distinct camera relay:

  • FQUVN contains 4 narrow-band, redshifted [O II] filters

  • FQCH4N contains 4 methane (CH4) band filters

  • POLQ contains 4 polarizing elements

For FQUVN and FQCH4N filters, the graph table is constructed such that distinct throughput values are automatically selected for a given quadrant based on the selected detector. For POLQ filter, it can also be specified by the direction its polarization; i.e., polq_perp for perpendicular polarization, and polq_par for parallel.

The quad filters were designed to map onto a 4-faceted WFC configuration. However, in the final design of the instrument, with WF Quadrant 1 replaced by the PC, it is necessary to rotate the quad filters as follow (see the WFPC2 Instrument Handbook for more details):

  • fquvn33, fqch4n33, and polqn33 represent the respective filters rotated by \(-33^{\circ}\) in order to bring Filter Quadrant 1 into the WF2 and WF3 relays

  • fqch4p15 and fqch4n15 represent FQCH4N partially rotated by \(\pm15^{\circ}\) in order to bring 2 of its quadrants into the PC relay

  • polqp15 and polqn18 represent POLQ partially rotated by \(+15^{\circ}\) and \(-18^{\circ}\), respectively, in order to allow observations with different polarization angles

The nominal positions are represented as fquvn, fqch4n, and polq keywords. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('wfpc2,2,fqch4n')  

Ramp Filter

Filter Wheel 12 contains 4 linearly variable narrow-band ramp filters, which together cover a total wavelength range of 3700 to 9800 Angstrom. The FWHM of the throughput at a given wavelength is typically about 1% of the central wavelength. To use a WFPC2 ramp filter in simulations, use the keyword syntax lrf#cenwave, where cenwave is the desired central wavelength in Angstrom. For example:

>>> import stsynphot as stsyn
>>> bp = stsyn.band('wfpc2,3,lrf#4861')