Proposal 11446 (STScI Edit Number: 2, Created: Wednesday, April 16, 2008 8:12:50 PM EST) - Overview 11446 - WFC3 UVIS dark current, readnoise, and CTE Cycle: 17, Proposal Category: SM4/WFC3 (Availability Mode: RESTRICTED) INVESTIGATORS Name Dr. Sylvia M. Baggett (PI) Dr. Susana E. Deustua (CoI) Institution Space Telescope Science Institute Space Telescope Science Institute E-Mail sbaggett@stsci.edu mackenty@stsci.edu VISITS Visit Targets used in Visit Configurations used in Visit Orbits Used Last Orbit Planner Run 01 WFC3/UVIS 1 16-Apr-2008 21:12:07.0 OP Current with Visit? yes WFC3/UVIS 1 16-Apr-2008 21:12:10.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:12.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:14.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:16.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:17.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:19.0 yes 02 03 04 05 06 07 BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK Proposal 11446 (STScI Edit Number: 2, Created: Wednesday, April 16, 2008 8:12:50 PM EST) - Overview Visit Targets used in Visit Configurations used in Visit Orbits Used Last Orbit Planner Run 08 WFC3/UVIS 1 16-Apr-2008 21:12:21.0 OP Current with Visit? yes WFC3/UVIS 1 16-Apr-2008 21:12:23.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:24.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:26.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:28.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:29.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:31.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:32.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:34.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:36.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:37.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:39.0 yes WFC3/UVIS 1 16-Apr-2008 21:12:40.0 yes 09 10 11 12 13 14 15 16 17 18 19 20 BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK BIAS DARK 2 Proposal 11446 (STScI Edit Number: 2, Created: Wednesday, April 16, 2008 8:12:50 PM EST) - Overview Visit Targets used in Visit Configurations used in Visit Orbits Used Last Orbit Planner Run 21 WFC3/UVIS 1 16-Apr-2008 21:12:42.0 OP Current with Visit? yes WFC3/UVIS 1 16-Apr-2008 21:12:43.0 yes WFC3/UVIS 2 16-Apr-2008 21:12:47.0 yes 22 30 BIAS DARK BIAS DARK DARK TUNGSTEN 24 Total Orbits Used ABSTRACT This proposal obtains full-frame, four-amp readout bias and dark frames at regularly-spaced intervals throughout SMOV in order to assess and monitor dark current, bad (warm, hot, dead) pixels, and readnoise. . In addition, a set of internals using the WFC3 calsystem are taken to provide a baseline CTE measurement. WFC3-33 OBSERVING DESCRIPTION This proposal obtains full-frame, four-amp readout bias and dark frames at regularly-spaced intervals throughout SMOV in order to assess and monitor dark current, bad (warm, hot, dead) pixels, and readnoise. In addition, a set of internals using the WFC3 calsystem are taken to provide a baseline CTE measurement. The EPER, or extended pixel edge response, technique will be employed: exposures are acquired at a variety of different signal levels and the CTE is measured from the profile of the trailing overscan region (poor CTE will result in significant charge in the overscan). The EPER images are acquired via the CTE=EPER parameter in the phase II proposal; these images have non-standard readouts with significantly larger areas of overscan to facilitate the CTE measurements. While the CTE in the WFC3 CCDs is expected to be excellent initially, radiation damage on-orbit will cause the CTE to degrade over time; the results from this program will serve as a baseline for future CTE monitoring. DEPENDENCIES: Can not be run until after successful completion of WF16 (prop 11429), UVIS TEC performance test. Bias/dark orbits should be 3 Proposal 11446 (STScI Edit Number: 2, Created: Wednesday, April 16, 2008 8:12:50 PM EST) - Overview spread relatively evenly throughout SMOV (they should not be run close in time to the WF18 (prop 11431) anneal bias/darks). DURATION: 24 internal orbits total (22 for biases/darks, where each orbit contains 2 biases and 1 dark, and 2 orbits for EPER images). No external targets are required. DATA REQUIREMENTS: 2191.2 Mbytes of biases/darks and 372 Mbytes of EPER imaging ANALYSES & EXPECTED RESULTS Readnoise will be measured from the overscan regions of individual bias frames as well as from science pixel areas within difference images of pairs of biases. Biases will be used in conjunction with biases from other programs (e.g., WF06, prop 11419) to generate a superbias and verify permanent defects such as blocked columns. Dark current levels, average rates as well as hot and warm pixel levels, will be determined from the dark frames. Darks will be used in conjunction with darks from other programs (e.g., WF06) to generate a superdark and maintain a tabulated list of hot pixels. CTE results, as measured from the internal flats, will be compared to those from groundbased tests and used as a baseline for future CTE monitoring. ADDITIONAL COMMENTS Can not be run until after successful completion of WF16 (prop 11429), UVIS TEC performance test. Bias/dark orbits should be spread relatively evenly throughout SMOV (they should not be run close in time to the WF18 (prop 11431) anneal bias/darks). 4 Proposal 11446, Visit 01, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: (none) # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:50 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 01 - WFC3 UVIS dark current, readnoise, and CTE 5 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 02, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 3 D TO 4 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:51 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 02 - WFC3 UVIS dark current, readnoise, and CTE 6 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 03, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 6 D TO 7 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:51 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 03 - WFC3 UVIS dark current, readnoise, and CTE 7 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 04, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 9 D TO 10 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:52 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 04 - WFC3 UVIS dark current, readnoise, and CTE 8 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 05, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 12 D TO 13 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:52 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 05 - WFC3 UVIS dark current, readnoise, and CTE 9 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 06, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 15 D TO 16 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:52 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 06 - WFC3 UVIS dark current, readnoise, and CTE 10 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 07, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 18 D TO 19 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:52 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 07 - WFC3 UVIS dark current, readnoise, and CTE 11 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 08, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 21 D TO 22 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:53 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 08 - WFC3 UVIS dark current, readnoise, and CTE 12 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 09, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 24 D TO 25 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:53 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 09 - WFC3 UVIS dark current, readnoise, and CTE 13 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 10, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 27 D TO 28 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:53 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 10 - WFC3 UVIS dark current, readnoise, and CTE 14 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 11, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 30 D TO 31 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:53 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 11 - WFC3 UVIS dark current, readnoise, and CTE 15 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 12, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 33 D TO 34 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:53 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 12 - WFC3 UVIS dark current, readnoise, and CTE 16 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 13, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 36 D TO 37 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:54 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 13 - WFC3 UVIS dark current, readnoise, and CTE 17 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 14, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 39 D TO 40 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:54 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 14 - WFC3 UVIS dark current, readnoise, and CTE 18 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 15, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 42 D TO 43 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:54 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 15 - WFC3 UVIS dark current, readnoise, and CTE 19 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 16, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 45 D TO 46 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:54 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 16 - WFC3 UVIS dark current, readnoise, and CTE 20 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 17, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 48 D TO 49 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 17 - WFC3 UVIS dark current, readnoise, and CTE 21 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 18, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 51 D TO 52 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 18 - WFC3 UVIS dark current, readnoise, and CTE 22 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 19, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 54 D TO 55 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 19 - WFC3 UVIS dark current, readnoise, and CTE 23 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 20, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 57 D TO 58 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 20 - WFC3 UVIS dark current, readnoise, and CTE 24 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 21, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 60 D TO 61 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 21 - WFC3 UVIS dark current, readnoise, and CTE 25 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Proposal 11446, Visit 22, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: AFTER 01 BY 63 D TO 64 D # Label Target Config,Mode,Aperture 1 Bias BIAS WFC3/UVIS, ACCUM, UVIS 2 Dark DARK WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:55 GMT 2008 Spectral Els. DEF Opt. Params. DEF Orbit Structure Exposures Visit Proposal 11446 - Visit 22 - WFC3 UVIS dark current, readnoise, and CTE 26 Special Reqs. Groups Exp. Time/[Actual Dur.] 0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 1800 Secs [==>] Orbit [1] [1] Visit Proposal 11446 - Visit 30 - WFC3 UVIS dark current, readnoise, and CTE Proposal 11446, Visit 30, implementation Diagnostic Status: No Diagnostics Scientific Instruments: WFC3/UVIS Special Requirements: (none) # Label Target Config,Mode,Aperture 1 Bias DARK WFC3/UVIS, ACCUM, UVIS Comments: Must use Bias exposure time of 0.5 seconds 2 CTE Tungst TUNGSTEN WFC3/UVIS, ACCUM, UVIS en Exposures Comments: Exposure times set for lamp 3. 3 CTE-2 TUNGSTEN WFC3/UVIS, ACCUM, UVIS Comments: Exposure times set for lamp 3. 4 CTE-3 TUNGSTEN WFC3/UVIS, ACCUM, UVIS Comments: Exposure times set for lamp 3. 5 CTE-4 TUNGSTEN WFC3/UVIS, ACCUM, UVIS Comments: Exposure times set for lamp 3. 6 CTE-5 TUNGSTEN WFC3/UVIS, ACCUM, UVIS Thu Apr 17 01:12:56 GMT 2008 Spectral Els. DEF F343N F343N F390M F390M F390W Opt. Params. CTE=EPER CTE=EPER CTE=EPER CTE=EPER CTE=EPER CTE=EPER Comments: Exposure times set for lamp 3. 27 Special Reqs. Groups Exp. Time/[Actual Dur.] 0.5 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 47.5 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 118.7 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 45.8 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 91.7 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] 38.0 Secs X 2 [==>(Copy 1)] [==>(Copy 2)] Orbit [1] [1] [1] [1] [1] [1] Orbit Structure Proposal 11446 - Visit 30 - WFC3 UVIS dark current, readnoise, and CTE 28