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Hubble Space Telescope
Phase I: 12096

COS Cycle-17 Calibration Phase-1 Template

Last Revised:			2 February 2010
Proposal ID:			TBD
Title:				COS FUV Detector Lifetime Position Test
PI:					David Sahnow
Co-I(s):				Tony Keyes, Steven Penton, Steven Osterman

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# Orbit estimates are TOTAL for all of cycle-17; assume 72 weeks) 

Total Prime Orbits:             3
External Parallel Orbits:       0
Internals or no-impact orbits:  0
Comments on orbit estimate:     One-time test


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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:                        To identify the best regions on the FUV
					  detector to use if and when a lifetime adjustment
					  becomes necessary.

Description:                    The FUV channel was designed with the ability
					  to select up to five separate lifetime
					  positions on the detector. Lifetime adjustments
					  may be made in order to allow the spectra to fall
					  on a cleaner region of the detector which has
					  less gain sag, fewer hot spots, and/or fewer detector
					  features. The purpose of this program is to identify the
					  characteristics of the detector at all of the other
					  lifetime positions so that a lifetime adjustment can
					  be made quickly and easily when the time comes. The
					  analysis will identify the detector characteristics
					  at a number of Y locations on the detector so that
					  the appropriate location to move to can be identified
					  ahead of time. In addition, a strategy for the long-term
					  use of the current position can be formulated once the
					  characteristics of the other positions are determined.
					  Finally, the exact Y positions for the four remaining
					  lifetime positions may be fine-tuned after analyzing
					  the data.

Accuracy:                       N/A
Comments on Accuracy:           N/A
Products:                       TIR on the detector characteristics at the various lifetime
					  positions.


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# Link to Cycle 17 Science
# Use the GO + GTO Phase 1 exposure  listing and derived statistics
# posted on WWW.

Fraction of science programs supported by this calibration:     0% before 
 a lifetime position adjustment; 100% after.

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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# THE REST OF THIS FORM IS FOR INTERNAL USE
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Observation summary: 
	(e.g. Take spectra of G191B2B at each supported central wavelength 
	 of each grating with the CCD and the 52x0.5 slit.) 

# Target information (copy for each target)

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

# Exposure list plan at the Phase I level. Be as complete as reasonable. 
# If possible information should be complete enough to allow easy 
# submission of a Phase 2 from this form. However, if you have to leave
# some of the fields blank below, or want to provide the information
# in another format, that is acceptable. (Make sure you do the BOP checking
# though, as this is a phase-1 issue.)

Table of exposures (copy for each exposure as appropriate/desired):

Target or lamp..........................: e.g. G191B2B, or HITM
Type of Acquisition.....................: e.g. ACQ-PEAK
Detector for observation................: e.g. CCD
Operating mode .........................: e.g. ACCUM or TIMETAG
Spectral Element........................: e.g. G430L
Aperture................................: e.g. 50x0.5
Central Wavelength......................: e.g. 4300
Exposure Time...........................: e.g. 300s, crsplit=2 
Number of Iterations ...................: e.g. 1
BOP Predicted Local Count Rate for MAMA.:
BOP Predicted Global Count Rate for MAMA:
ETC PID IDs for Count Rates.............:
Special Requirements or options.........: (e.g. GAIN=4; LOW-SKY)
Comments: (e.g. if monitoring, specify frequency)