Synphot Data User's Guide
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| Synphot Data User's Guide | |||||
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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The instruments which have previously flown on HST but have been replaced by more modern detectors are included here for completeness.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:
- Telescope: ota noota
- COSTAR: costar nocostar
- Instruments: acs cos fgs foc fos hrs hsp nicmos pc stis wf wfc wfc3 wfpc wfpc2
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
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
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
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
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
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; andcont#, 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
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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