Synphot Data User's Guide


1.4 Retired Instruments

The instruments which have previously flown on HST but have been replaced by more modern detectors are included here for completeness.

The complete list of allowed component names that represent the telescope, COSTAR, and science instruments is:

As of September 1993, the default modes for the Telescope and COSTAR components were "ota" and "nocostar", respectively. Soon after COSTAR was installed in the telescope, the default mode was changed to "costar" for original instruments. Once the second-generation instruments were installed, with their built-in optical corrections, the default mode for "costar" or "nocostar" became instrument-specific. Note that for the WF/PC-1 instrument the names "wf", "wfc", and "wfpc" are all equivalent and correspond to the WFC mode of the WF/PC-1 instrument.

1.4.1 FOC

The FOC keywords consist of a list of detectors, filters, and miscellaneous keywords. The f/48 has two filter wheels and the f/96 detector has four filter wheels. Some of the filters have aliases. "fuvop" is an alias for PRISM1, "nuvop" is an alias for PRISM2, "fopcd" is an alias for PRISM3, "g450m" is an alias for F305LP, "g225m" is an alias for F220W, and "g150m" is an alias for F140W. The miscellaneous keywords include the COSTAR and the occulting fingers. An example of an FOC observation mode string would be "FOC,COSTAR,F/96,F410M".

Table 1.9: FOC 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)
f/48 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)
f/96 Wheel 2 f140w f175w f220w f275w f320w f342w f370lp f430w f480lp f486n f501n
f/96 Wheel 3 f120m f130m f140m f152m f165w f170m f190m f195w f210m f231m f1nd
f/96 Wheel 4 f130lp f253m f278m f307m f346m f372m f410m f437m f470m f502m f550m
f/48 Image Formats x48n256 x48n256d x48n512 x48nlrg x48zlrg x48zrec
f/96 Image Formats x96n128 x96n256 x96n512 x96nlrg x96z512 x96zlrg
Spectral Order order1 order2 order3 order4
Occulting Fingers occ0p23 occ0p4 occ0p8
Detector Formats 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 synphot keywords is listed in Table 1.9.

Table 1.10: FOC Detector Format Keywords
Camera Synphot 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

1.4.2 FOS

The FOS keywords consist of a list of detectors, apertures, gratings, and polarimeter waveplates and waveplate position angles. The waveplate keywords indicate whether waveplate A or B is being used and the angle of the waveplate. An example of an FOS observation mode string would be "FOS,BLUE,G160L".

Table 1.11: FOS Keywords
Detectors blue red
Apertures 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
Gratings g130h g190h g270h g400h g570h g780h g160l g650l mirror prism order0
Waveplates 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
COSTAR costar nocostar

The upper and lower aperture keywords are only recognized when used in conjunction with one of the paired apertures, e.g., "FOS,BLUE,G130H,UPPER,1.0-PAIR". The order0 keyword is only available in conjunction with the g160l grating and the blue detector. The waveplate keyword syntax is POLpa-wp, where pa is the position angle in degrees, and wp is the A or B waveplate.

1.4.3 HRS

The HRS keywords consist of a list of detectors, apertures, gratings or mirrors, and Echelle mode orders. 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 are valid with Echelle mode A. An example of a typical HRS abbreviation mode string would be "HRS,LSA,G160M".

Table 1.12: HRS Keywords
Apertures lsa ssa
Gratings echa echb g140l g140m g160m g200m g270m
Mirrors a1 a2 n1 n2
Echelle Orders 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
COSTAR costar nocostar

1.4.4 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. An example of an HSP observation mode string would be "HSP,UV1,F220W,C".

Table 1.13: HSP Keywords
Detectors pmt pol uv1 uv2 vis
POL Filters f160lp f216m f237m f277m f327m
UV1 Filters f122m f135w f140lp f145m f152m f184w f218m f220w f240w f248m f278n prism
UV2 Filters f122m f140lp f145m f152m f160lp f179m f184w f218m f248m f262m f278n f284m prism
VIS Filters f160lp f184w f240w f262m f355m f400lp f419n f450w f551w f620w prism
Relay mirror norelay relay
Apertures a b c d e f h j s t
Beams blue red
Polarization Angles 0 45 90 135
Polarization Types ext ord par per

1.4.5 WF/PC-1

The WF/PC-1 keywords consist of a list of filters, detectors, and miscellaneous keywords. The miscellaneous keywords include baum, which accounts for the Baum spot; dn, which converts units from electrons to data numbers (DNs); cal, which accounts for the flat-field correction; and cont#, which accounts for changes in sensitivity between decontamination events (see Section 2.2).

The WF/PC-1 has twelve independently positionable filter wheels, each of which has five positions, including a clear position. Detectors 1 through 4 correspond to the Wide Field camera, while 5 through 8 are the Planetary camera. A typical WF/PC-1 observation mode string would be "WFPC,F550W,4,DN".

Table 1.14: WFPC1 Keywords
Instrument wfpc, wfc, wf (all equivalent), pc
Detectors 1 2 3 4 5 6 7 8
Miscellaneous baum dn cal cont#
Filter Wheel 1 f673n f8nd g450 g800
Filter Wheel 2 f122m f336w f439w g200 g200m2
Filter Wheel 3 pol0 pol60 pol120 f1083n
Filter Wheel 4 f157w f194w f230w f284w
Filter Wheel 5 f569w f658n f675w f791w
Filter Wheel 6 f631n f656n f664n f702w
Filter Wheel 7 f375n f437n f502n f588n
Filter Wheel 8 f368m f413m f492m f622w
Filter Wheel 9 f547m f555w f648m f718m
Filter Wheel 10 f785lp f814w f875m f1042m
Filter Wheel 11 f128lp f469n f487n f517n
Filter Wheel 12 f606w f725lp f850lp f889n

The detector specifications 1 through 4 are valid only when used in conjunction with the wf, wfc, or wfpc instrument keywords, and detectors 5 through 8 are only valid when used with the pc keyword. If a detector number is not specified, the default detector for WF is #2, and the default for PC is #6.

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