E.5 The Cycle 19 Calibration Plan

The Cycle 19 calibration plan was executed from October 2011 through September 2012. It is discussed in WFC3 ISR 2012-04.

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 Web page.

The Cycle 19 calibration plan was designed to:

•	continue to maintain and update the standard reference files (biases, darks, IR non-linearity, UVIS and IR geometric distortion table)

•	monitor the pixel-to-pixel response of both channels and the hysteresis (QE) offset

•	validate the temporal and spatial photometric performance of the WFC3 channels

•	characterize and model the persistence effects in the IR detector and verify the temporal behavior

•	characterize and model the charge transfer efficiency (CTE) in the UVIS channel, including analysis and calibration of the post-flash option

•	improve the wavelength and flux calibration over the whole detector for all the WFC3 grisms

•	validate in-flight correction of the flat fields

•	improve the accuracy of the absolute photometric calibration

The results of these calibration programs are being documented in Instrument Science Reports on the WFC3 Web site at:

http://www.stsci.edu/hst/wfc3/documents/ISRs/

Table E.6: Cycle 19 Calibration Programs  

Proposal ID	Title
12687	UVIS Anneal
12688	UVIS Bowtie Monitor
12689	UVIS CCD Daily Monitor
12690	UVIS CCD Gain Stability
12691	UVIS CTI Monitor (EPER)
12692	UVIS CTE Monitor (Star Clusters)
12693	UVIS Charge Injection
12694	IR Persistence Strength
12695	IR Dark Monitor
12696	IR Linearity Monitor
12697	IR Gain Monitor
12698	WFC3 Contamination & Stability Monitor
12699	WFC3 Photometric Calibration & Calibration Flux Ladder
12700	Extending the Range & Precision of the Count Rate non Linearity
12701	WFC3 PSF Wings
12702	IR Grisms: Flux/Trace Calibration & Stability
12703	IR Grisms: Wavelength Calibration & Stability
12704	UVIS Grism: Flux Calibration
12705	UVIS Grism: Wavelength Calibration & Stability
12706	UVIS Flare Wavelength Dependence
12707	UVIS Spatial Sensitivity
12708	IR Spatial Sensitivity
12709	UVIS & IR Moonlit Flats
12710	UVIS Bright Earth Flats
12711	UVIS Internal Flats
12712	IR Internal Flats
12713	Spatial Scanned L-flat Validation Pathfinder
12714	UVIS & IR Geometric Distortion
12784	Characterization of UVIS Traps Via Charge-Injected Biases
12794	Repeatability of High Precision Photometry and Astrometry in Spatially Scanned UVIS Data
12798	Bias, Dark, and Charge Injection (CI) for UVIS Binned mode
12802	WFC3 Post-Flash Characterization
12803	Guard Darks
12808	Characterization of UVIS Pixel-to-Pixel QE Variations Via Internal Flats
13068	WFC3 Blob Monitor Using Dark-Earth IR Flats
13069	WFC3 UVIS Post-Flash Calibration
13103	WFC3/UVIS Anneal
13104	UVIS Bowtie Monitor
13105	Characterization of UVIS Traps Via Charge-Injected Biases