ADVISORIES and Instrument Status (last updated 9 December 1997)

Important information, new documentation, and products for FOS. Everyone should ALWAYS read this!

The STARVIEW screen which reports a comparison of the `Used' vs latest `Recommended' Calibrations available for any given FOS dataset is misleading in certain cases. When reporting on a dataset which was archived before the Average Inverse Sensitivity (AIS) flux calibration method was available this tool correctly reports that none of the associated calibration files were `used' and also correctly lists the files needed to perform this calibration. However, the STARVIEW screen incorrectly qualifies the `Level of Change' of these calibrations as `N/A'. The AIS corrections are ALWAYS RECOMMENDED. This notice applies as well to data archived before implementation of the default Scattered Light Correction (.cy9 reference file).

***Important G130H/BL Sensitivity Changes---We present two important items pertaining to FOS/BL G130H sensitivity changes and methods of analysis.

***ISR-148, Observed white-light FOS PSFs and LSFs has been withdrawn. The redside psf, in particular, in that ISR should not be used.

Calibration Products and Tools (last updated 9 May 1996)

References to a variety of FOS calibration products.

Documentation (last updated 19 December 1996)

Access Instrument Science Reports, the FOS Instrument Handbook, HST Data Handbook, Calibration Workshop proceedings, Telescope and Instruments Performance Summary (TIPS) viewgraphs, and many other FOS publications and reports.

Frequently Asked Questions (last updated 19 June 1997)

Post-COSTAR observing strategy and data analysis FAQ.

User Support (last updated 21 February 1996)

Information on visiting the Institute, contacts, and STScI Help Desk e-mail access.

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19 June 1997