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Hubble Space Telescope
Phase I: 11891

COS Cycle-17 Calibration Phase-1 Template

Last Revised: 
Proposal ID: 11891
Title: NUV Detector Fold Test
PI: T. Wheeler
Co-I(s): A. Welty (STScI)
         D. Sahnow (JHU)
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# Orbit estimates are TOTAL for all of cycle-17; assume 4 weeks 
# 01 March 2009, 01 September 2009, 01 March 2010

Total Prime Orbits:                  0
External Parallel Orbits:            0
Internals or no-impact orbits:       2
Comments on orbit estimate:   Execute 6 months after COS SMOV ends
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# This section should be written with a GO audience in mind -- use 
# Calibration plans in WFPC-2 handbook as a guide.

Purpose:  Measure the performance of the MAMA microchannel plates 

                                      
Description:     The fold analysis provides a measurement of the 
                 distribution of charge cloud sizes incident upon the 
                 anode, giving some measure of changes in the pulse height 
                 distribution of the MCP and, therefore, MCP gain. While 
                 illuminating the detector with a flat field lamp (D2), the 
                 valid event rate counter is monitored while various 
                 combinations of row- and column-folds are selected. The 
                 procedure is implemented using special commanding. It is 
                 also exercised during SMOV as proposal 13555 (visit 5) 

               
Accuracy:  Position in peak of fold distribution to be measured to 5%
           accuracy

Comments on Accuracy:
     
Products:  TIR



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# THE REST OF THIS FORM IS FOR INTERNAL USE
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# Target information (copy for each target)

Target Name.............................: n/a (internal)	
RA.............................................: n/a 		
Dec...........................................: n/a		
Flux (and units)........................: n/a	
Visibility window (if known or relevant): n/a
Comment on choice of target: n/a

# Table of exposures (copy for each exposure):

Target or lamp..........................: 
Type of Acquisition.....................: 
Detector for observation................: 
Operating mode .........................: 
Spectral Element........................: 
Aperture................................: 
Central Wavelength......................: 
Exposure Time...........................: 
Number of Iterations ...................: 
BOP Predicted Local Count Rate for MAMA.: 
BOP Predicted Global Count Rate for MAMA: 
ETC PID IDs for Count Rates.............: 
Special Requirements or options.........: 
Comments: Take exposure every six months  
                                          
Target or lamp..........................: 
Type of Acquisition.....................: 
Detector for observation................: 
Operating mode .........................: 
Spectral Element........................: 
Aperture................................: 
Central Wavelength......................: 
Exposure Time...........................: 
Number of Iterations ...................: 
BOP Predicted Local Count Rate for MAMA.:
BOP Predicted Global Count Rate for MAMA:
ETC PID IDs for Count Rates.............:
Special Requirements or options.........: 
Comments: Take exposure every six months.

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# Special needs of this proposal?

Scheduling: Execute 6 months after COS SMOV ends 

Prerequisites: n/a

PDB update?               no
On-board table update?    no

# Special Requirements:
Real time?                N
Special commanding?       N
Quick Data turnaround?    N
Special timing required?  N
Other?                    N
Describe (& justify) special requirements:


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# Link to Cycle 17 Science

Fraction of science programs supported by this calibration: 25% of COS

List categories of science which can't be executed until after this proposal:
  none
why: 

List categories of science which are best performed contemporaneous with 
this proposal: 
  none
why:

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Expected FTE weeks for analysis:            1   
Required turnaround on analysis (weeks):    
Data volume (Mb needed for analysis):       
Special software needed for analysis? (Describe): 

Description of analysis Plans: