Page 1. Page 2 SMOV Status SMOV is proceeding on-track Key programs executed –ERO program –Geometric distortion program completed –ACS to FGS alignment.

Page 1

Page 2

SMOV Status

• SMOV is proceeding on-track

• Key programs executed– ERO program– Geometric distortion program completed– ACS to FGS alignment– Image quality– ACS Sensitivity – HRC Flat fields

• ERO press conference: April 30th

Page 3

SMOV

Page 4

Geometric Distortion

• Added 4th order polynomial terms to the solution for the WFC. The distortion fits are now good to approximately 0.1 pixels (RMS of 0.05 pixels)[Lindler & Meurer]

Page 5

WFC hot Pixel Growth Rates

• WFC hot pixel growth rate is ~170 pixels/day (Riess)– Anneal repaired ~45% of hot pixels (~80% in HRC)

Page 6

Sensitivity

• Initial results for HRC sensitivity program (Pavlovsky and DeMarchi)– Target GD71– Filters in general agreement with predictions– Z Band filter is probably high due to absence of ground-based

measurements beyond 1000 nm. – Near-UV measurements are under investigation

Page 7

CALACS

• Minor problems are being identified and fixed in CALACS– Quickfix for CALACS 13.4D

– Change to sky determination

– OPUS 14.0 due mid-June– Keyword rule modifications

– Keyword database

– Keyword Population

– Reference files – New files ready for delivery

– Bad pixel table, Bias, Dark, CR-Reject

– WFC and HRC flat field files need updates

Page 8

SBC

• SBC anomalous recovery was terminated after initial LVPS turn-on

• Ball Aerospace expressed concern that LVPS really needed 24 hours to outgas at operating temperature before HV switch-on

• Impact: – Did not bring SBC on-line– Lost this weeks contamination monitor– Proposal has to be re-worked with special commanding before

being re-scheduled– Moved up Grism & Ramp filter proposals

Page 9

Gyro-3

• Gyro-3 glitch has resulted in at least 3 visits of observations from 9018 being lost– These observations are used to build L-flats using 47 Tuc images– Smearing of images precludes photometry

• Data Compression– Analysis shows we can use factor of 2 for bias and darks– Currently using 1.5

Page 10

Cycle 11 Calibration Plan: I

• (O’dea and Gilliland) – CCD Daily monitoring:

Bias/dark verification at different gains – SBC Dark current monitoring.– SBC Fold analysis, anomalous recovery – SBC flats, CCD internal .at stability– Internal CTE monitor (EPER, FPR)– CCD Hot Pixel Annealing – Photometric stability and contamination monitor – HST focus monitor (ACS, WFPC2 parallel obs.)

Page 11

Cycle 11 Calibration Plan:II

– Earth flats.– Geometric distortion check, full field sensitivity, L-flat, external CTE

checks.– Photometry cross-cal. : WFPC2, SDSS, U,B,V,R,I. – SBC Photometric cross-cal with STIS – Polarimetry calibration– PSF definition and HRC red halo– Coronographic (CORON1.8 and 3.0) PSF – Shutter stability verification– Narrowband filter red-leak check– Wavelength stability narrowband and ramps– Photometry for extreme red objects– Grism/prism checks – Linearity, gain setting qualification– Sky flats.

Page 12

Cycle 11 Calibration Plan:III

• Special calibrations – capability definition.– Ramp observations

- flat field, lambda dependent calibration – Determination of limiting (high) S/N for repeated observations– Optical baffling check (bright stars off edge) – Preflash flat field check– Scattered Earthshine (near limb) – SBC prisms, brief characterization – Field dependence of polarimetry.