1. HST Quarterly Review Page 1 Space Telescope Science Institute 15 October 2003 SI Status: COS STScI COS Program Activity SubprojectSTScI Activity Instrument Development IDT/STScI MOU I & T Ball (Thermal-Vac support) Commanding and Scheduling System OP-01 Ops bench testing Pipeline and Calibration keyword development pipeline development SM4 planning User Support COS ETCs Instr. Handbook development COS activities are a traditional-mode, new HST instrument development project coordinated with IDT led by PI Jim Green (Colorado) STScI supports COS science operations by leading development of “front- end” (operations) and “back-end” (OPUS/MAST/calibration) ground system and user support functions..

2. HST Quarterly Review Page 2 Space Telescope Science Institute 15 October 2003 SI Status: COS STScI Support of COS Thermal-Vacuum Testing COS Initial Alignment and Verification Thermal-Vac at Ball: 25 June-10 July COS Thermal-Vacuum Science Calibration at Ball: 22 Sep-21 Oct  NUV testing complete; FUV commences 10 Oct STScI Thermal-Vac planning and participation  Close coordination of STScI support activities with IDT  All STScI COS Instrument Scientists provide onsite support for SI operation, data- taking, and analysis  Keyes, Sembach, Leitherer, Friedman, and Bohlin stand multiple-day shifts during initial alignment and science calibration Thermal-Vacuum activities; Hartig will “float”  Hartig provides onsite optical alignment support  Per STScI/COS IDT MOU STScI provides OPUS processing, conversion to FITS, and HDA-archival of all COS Thermal-Vacuum data  Processed approximately 520 datasets from initial alignment and verification activities  Processed approximately 1200 science calibration datasets to date STScI post-test analysis activities  Repeatability monitor (Friedman): no anomalies in verification testing  Flat fields (Bohlin): verified 1% flatfield and 1% rms per pixel in extracted absorption line spectrum  Keyword processing anomalies (Sembach, Keyes, Friedman, Hartig, Hodge)

3. HST Quarterly Review Page 3 Space Telescope Science Institute 15 October 2003 SI Status: COS STScI Ground Systems and User Support Activities STScI scheduling system  Flat field commanding updates implementation and local testing completed  Bench testing of timing and commanding for all FUV and NUV exposure modes except target acquisition completed  Coordinated parallels now in requirements definition Delivered updated Cycle 13 COS mini-Handbook (Sembach); includes post-verification updates Spectroscopic APT/ETC implementation underway SMOV4 requirements defined (Friedman, Keyes); reviewed and approved by HSTP Supported SM4 BEA review (Keyes) STScI COS Bright Object Protection checking software for user support (ROBOT) development underway

4. HST Quarterly Review Page 4 Space Telescope Science Institute 15 October 2003 SI Status: COS Sample COS FUV Spectrum “A” Segment Note: segment “B” (not shown) records remaining half of bandpass Internal PtNe calibration lamp (no distortion correction)

5. HST Quarterly Review Page 5 Space Telescope Science Institute 15 October 2003 SI Status: COS Internal PtNe calibration lamp Sample COS NUV Spectrum Note: 3 stripes are not continuous in wavelength

6. HST Quarterly Review Page 6 Space Telescope Science Institute 15 October 2003 SI Status: COS 5001000 500 1000 0 Initial NUV External Flatfield Results (September 2003) COS G185M NUV P-flat (Bohlin) 1.36% Poisson rms Pixel (cross-dispersion) Pixel (dispersion) Intrinisic detector scatter (1  3.25%) within the 100x100 pixel box shown in dashed lines 20,000 - 40,000 counts per pixel in each stripe C B A Pixel (dispersion)

7. HST Quarterly Review Page 7 Space Telescope Science Institute 15 October 2003 SI Status: COS Initial NUV External Flatfield Results (September 2003) rms deviation from unity ratio characterizes S/N Normalized ratio of first half of exposure to second half (Friedman)

8. HST Quarterly Review Page 8 Space Telescope Science Institute 15 October 2003 SI Status: COS TA1 Image (NUV) Double pinhole aperture 1” (~40 pixels) separation 0 10 20 30 40 201030405060 Dispersion (pixels) Cross Dispersion (pixels) Images are clearly resolved Initial Spatial Resolution Results (July 2003)