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<HSTProposal
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   Phase="Phase II"
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   <!--This file is automatically generated and should not be edited by hand. Editing this file directly is at your own risk.-->
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   <!--Date: Thu Jul 07 11:26:54 GMT 2016-->
   
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            SubmissionSuccessCounter="5"
            HasErrors="false"
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            IncludeSysInfo="true"
            NotificationAddress="marcoc@stsci.edu">
            
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               os.name="Mac OS X"
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            <SubmissionComments>changed timing links, and added orient link, changes requested by Marco</SubmissionComments>
            
            <SubmissionCommentsCheckSum>-756311891</SubmissionCommentsCheckSum>
            
            <SubmissionLog>----- Attempting Submission 1 (Thu Oct 15 19:07:17 GMT 2015) -----

----- Attempting Submission 2 (Mon Oct 26 15:20:23 GMT 2015) -----

----- Attempting Submission 4 (Wed Oct 28 18:21:23 GMT 2015) -----

----- Attempting Submission 5 (Wed Dec 09 20:33:41 GMT 2015) -----
Your proposal could not be saved.
Submission aborted.

----- Attempting Submission 6 (Thu Jul 07 11:26:54 GMT 2016) -----</SubmissionLog>
            
            <Phase2DiagnosticJustification>It should be ok since I get the same warnings every cycle and the program was not changed</Phase2DiagnosticJustification>
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   <ProposalInformation
      Category="CAL/ACS"
      PureParallelProposal="false"
      Cycle="23"
      STScIEditNumber="1">
      
      <Title>ACS External CTE Monitor</Title>
      
      <Abstract>This program will obtain a direct calibration of photometric losses due to imperfect CTE by imaging stars in 47 Tuc.</Abstract>
      
      <PrincipalInvestigator
         Honorific="Dr."
         FirstName="Marco"
         LastName="Chiaberge"
         ESAMember="true"
         CSAMember="false"
         Retired="false"
         UniqueID="6163"
         Institution="Space Telescope Science Institute - ESA"
         Country="USA"
         State="MD"
         Contact="true" />
      
      <Questions>
         
         <Phase2Questions>
            
            <ObservingDescription>For each pointing we will obtain 2 CR-SPLITs to allow cosmic ray rejection and provide a set of clean stars for the analysis of CTE effects on photometry. More specifically, since the CTE also depends on the background level, we will obtain 5 different background levels, using the F502N and F606W filters and different exposure times, from 30s to 400s per exposure. In this way, we will obtain background levels ranging from ~0 to ~50 e-/pixel. Thus the total number of exposures is 5 (bkg levels) x2 (CR-SPLIT) x 3 (positions on the sky) = 30. Since it is crucial to obtain an almost constant sky level, we will request low sky. Four to five images can be done each orbit so the total orbit request is 8 orbit. One field located closer to the nucleus of the cluster (~2' off-center) will also be imaged with the same technique. A series of short (30s) exposures with be taken with F502N in order to obtain a larger number of stars in the field of view. This will allow us to better characterize the effects of CTE for extremely low background values.</ObservingDescription>
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      <Phase1ProposalInformation>
         
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         <Availability>RESTRICTED</Availability>
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            <Description>GLOBULAR CLUSTER</Description>
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         <Comments>Field 6' W of cluster centre.</Comments>
         
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         <Comments>This object was generated by the targetselector and retrieved from the SIMBAD database.</Comments>
         
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         <Comments>USE SINGLE GUIDE STAR IF NECESSARY.VISIT SHOULD USE CONTIGUOUS ORBITS
DO NO BREAK ORBITS</Comments>
         
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         <Comments>USE SINGLE GUIDE STAR IF NECESSARY.VISIT SHOULD USE CONTIGUOUS ORBITS
DO NO BREAK ORBITS</Comments>
         
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         </SeqWithin>
         
         <OnHoldComments />
         
         <ExposureGroup
            Type="Same Obset">
            
            <ExposureGroup
               Type="Non-Interruptible Sequence">
               
               <Exposure
                  Number="1"
                  TargetName="NGC104-F502N"
                  Config="ACS/WFC"
                  Opmode="ACCUM"
                  Aperture="WFC"
                  SpElement="F502N"
                  NumberOfIterations="1"
                  RealtimeAnalysis="false"
                  RequiresUplink="false"
                  Expand="false"
                  LowSky="true"
                  Shadow="false"
                  GSAcqScenario="BASE1B3"
                  NewAlignment="false"
                  NewObset="false"
                  NewObsetFullAcq="false"
                  SpecialCommand="false">
                  
                  <ExposureTime
                     Secs="60.0" />
                  
                  <PosTarg
                     X="0.0"
                     Y="0.0" />
                  
                  <MaxDur />
                  
                  <MinDur />
                  
                  <Comments />
                  
                  <InstrumentParameters
                     CR-SPLIT="2" />
                  
                  <SubExposures>
                     
                     <SubExposure
                        SplitNumber="1"
                        OrbitNumber="1"
                        ScanDirection="" />
                     
                     <SubExposure
                        SplitNumber="2"
                        OrbitNumber="1"
                        ScanDirection="" />
                  </SubExposures>
               </Exposure>
               
               <Exposure
                  Number="2"
                  TargetName="NGC104-F502N"
                  Config="ACS/WFC"
                  Opmode="ACCUM"
                  Aperture="WFC"
                  SpElement="F502N"
                  NumberOfIterations="1"
                  RealtimeAnalysis="false"
                  RequiresUplink="false"
                  Expand="false"
                  LowSky="true"
                  Shadow="false"
                  NewAlignment="false"
                  NewObset="false"
                  NewObsetFullAcq="false"
                  SpecialCommand="false">
                  
                  <ExposureTime
                     Secs="60.0" />
                  
                  <PosTarg
                     X="0.0"
                     Y="103.64" />
                  
                  <MaxDur />
                  
                  <MinDur />
                  
                  <Comments />
                  
                  <InstrumentParameters
                     CR-SPLIT="2" />
                  
                  <SubExposures>
                     
                     <SubExposure
                        SplitNumber="1"
                        OrbitNumber="1"
                        ScanDirection="" />
                     
                     <SubExposure
                        SplitNumber="2"
                        OrbitNumber="1"
                        ScanDirection="" />
                  </SubExposures>
               </Exposure>
            </ExposureGroup>
         </ExposureGroup>
      </Visit>
   </Visits>
</HSTProposal>
