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Supported NICMOS Capabilities for Cycle 7-NICMOS

As was done for both NICMOS and STIS for Cycle 7,we have established a set of core scientific capabilities of NICMOS which will be supported for Cycle 7-NICMOS science. These capabilities cover an enormous range of science applications. In practice, the supported capabilities will be phased in during Cycle 7, as our understanding of the instrument and on-orbit performance grows. This phasing will optimize the likelihood that observations are successfully executed and assure that the requisite calibration observations are obtained.

NICMOS has additional capabilities that are not supported for Cycle 7-NICMOS. These capabilities are "available" in the form of Engineering-only modes, upon consultation with a NICMOS Instrument Scientist. If you find that your science cannot be performed with the capabilities described in this handbook, you may wish to consider an unsupported capability. The use of these capabilities requires approval from STScI and support for calibration may be limited or non-existent.

Supported capabilities include:

NIC1, NIC2 observations in any filter or polarizer.
NIC3 observations in campaign mode (i.e., in-focus NIC3 observations).
MULTIACCUM and ACCUM detector readout modes (but see Chapter 8 for a discussion of the problems that can be faced when using ACCUM mode).
Coronographic observations including on-board target acquisitions. Unsupported ("available") capabilities include:
The Field Offset Mirror (FOM).
BRIGHTOBJ readout mode. The calibration and linearity of this mode is problematic.
The RAMP readout mode. This detector readout mode is similar to a limited version of the MULTIACCUM mode with the processing carried out within the NICMOS instrument computer and only the final processed image downlinked.
Any non-standard ACCUM exposure time or any MULTIACCUM exposure times not incorporated in one of the standard sequences of exposures (SAMP-SEQ). ACCUM with NREAD other than 1 or 9. Use of unsupported modes comes at a price, and these modes should be used only if the need and scientific justification are particularly compelling. Proposers should be aware of the following caveats in the use of unsupported modes:
Calibrations for unsupported capabilities will not be provided by STScI. Observers must either determine that they can create calibration files from data in the HST Archive or they must obtain calibrations as part of their observations. The STScI pipeline will not calibrate data taken in unsupported modes but will deliver uncalibrated FITS files (or in some cases partially calibrated FITS files) to the observer and the HST Archive.
STScI adopts a policy of shared risk with the observer for the use of unsupported capabilities. Requests to repeat failed observations taken using unsupported capabilities will not be honored if the failure is related to the use of the unsupported capability.
User support from STScI for the reduction and analysis of data taken using unsupported capabilities will be limited and provided at a low priority. Users taking data with unsupported capabilities should be prepared to shoulder the increased burden of calibration, reduction, and analysis of these data. Cycle 7-NICMOS proposals which include use of unsupported NICMOS capabilities must include a justification of why the science cannot be done with a supported configuration, must include a request for any observing time needed to perform calibrations, must justify the added risk of using an unsupported mode in terms of the science payback, and must include a demonstration that the observers are able to shoulder the increased burden of calibration, reduction, and analysis of their data.

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