E.5 The Cycle 18 Calibration Plan

The Cycle 18 calibration plan is summarized in WFC3 ISR 2011-14. It was executed from October 2010 through September 2011. The calibration programs comprising this plan are listed in Table E.6. The proposals and observation dates can be viewed by entering the Proposal ID into the HST Program Information webpage. The Cycle 18 plan provides less frequent monitoring of characteristics that were demonstrated to be stable during Cycle 17. It places increased emphasis on characterizing IR persistence, measuring UVIS and IR flat fields, calibrating the IR grism, monitoring CTE on the UVIS detector, and quantifying the ability to do high contrast imaging on both detectors. It tests CTE mitigation procedures and the performance of spatial scans for high S/N IR observations.

The results of these calibration programs have been documented in Instrument Science Reports on the WFC3 website at:
 http://www.stsci.edu/hst/instrumentation/wfc3/documentation/instrument-science-reports-isrs.

Table E.6: Cycle 18 Calibration Programs  

Proposal ID

Title

12333

UVIS&IR Zeropoint Stability Monitor

12334

UVIS & IR Photometric Calibration

12335

IR Color Transformation with asterisms

12336

Scan Enabled Photometry

12337

UVIS Flat Field Stability

12338

IR Flat Field Stability Monitor

12339

UVIS L-Flat Correction

12340

IR L-Flat Correction

12341

IR Blob Photometry Test

12342

UVIS Darks and Bias Monitor

12343

UVIS Anneal

12344

UVIS Bowtie Monitor

12345

UVIS Long Darks Test

12346

UVIS CCD Gain Stability Test

12347

UVIS Internal CTE Monitor: EPER

12348

UVIS Charge Injection Test

12349

IR Dark Monitor

12350

IR Gain Monitor

12351

IR Persistence Experiments

12352

IR Non-linearity (full frame & subarrays)

12353

UVIS & IR Geometric Distortion Corrections

12354

High Contrast Imaging

12355

IR Grism Wavelength and LSF Calibration

12356

IR Grism Wavelength Calibration Stability Test

12357

IR Grism Flux Calibration Monitor

12358

IR Grism L-flat Correction and Independent 2-D Wavelength Solution

12359

UVIS Grism Wavelength Calibration

12379

UVIS CTE Monitor: Star Clusters