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Phase I: 11900

COS Cycle-17 Calibration Phase-1 Template

Last Revised: 03/24/2009
Proposal ID: 11900
Title: NUV Internal/External Wavelength Scale Monitor
PI: C. Oliveira
Co-I(s): T. Keyes (STScI)
         D. Sahnow (JHU)
         P. Ghavamian
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# Orbit estimates are TOTAL for all of cycle-17

Total Prime Orbits:                  18
External Parallel Orbits:            0
Internals or no-impact orbits:       0
Comments on orbit estimate:          Assumes Cycle 17 runs until 11/1/2010
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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:  Monitor zero-point offsets for the wavelength scale (internal 
          wavecal lamp to external standard wavelength scale) for relevant
          central wavelength settings.

                                      
Description:  Observe external radial velocity standard targets in
              TIME-TAG, FLASH=YES mode, and monitor zero-point offsets
              between wavelength scale set by internal wavecal vs. that
              defined by absorption lines in the target. Do this once every
              1-2 months for each target / observing mode combination to
              establish repeatability of the zero point offsets. 

     	      Each target in this proposal is observed 6 times in this
     	      calibration program, each visit is 1 orbit, for a total of 18
     	      orbits. The visits are spread throughout the duration of
     	      Cycle 17, taking into account the visibility constraints of
     	      each target. G285M 2676 and 2695 are observed with HD187691
     	      and HD6655, allowing us to cross-check the two targets.                            
              For G230L (the grating with the largest exptime allocated in
     	      Cy 17) all cenwaves used in Cy 17 GO programs are
     	      monitored. For G185M 4 out of the 6 cenwaves used in Cy 17
     	      are monitored. The 2 cenwaves not monitored only have 400 sec
     	      of GO time each. For G225M 2 of the 4 cenwaves used in Cy 17
     	      are monitored, bracketing the cenwaves used in GO programs. 
	      For G285M 3 of the 4 cenwaves used in Cy 17 are monitored.                                          
               
Accuracy:  0.2 pixel wavelength zero point accuracy 

Comments on Accuracy:  
     
Products:  Reference files, ISR.



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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.............................: HD187691
RA......................................: 19H51M1.6427S +/- 0.1"
Dec.....................................: +10D24'56.62" +/- 0.1"		
Flux (and units)........................: V = 5.12	
Visibility window (if known or relevant): N/A
             Comment on choice of target: Good target for G225M and G285M

Target Name.............................: FEIGE48
RA......................................: 11H47M14.5100S +/- 0.1"
Dec.....................................: +61D15'31.70" +/- 0.1"
Flux (and units)........................: V = 13.28
Visibility window (if known or relevant): N/A
             Comment on choice of target: Good target for G185M

Target Name.............................: HD6655
RA......................................: 01H05M18.2073S +/- 0.1"
Dec.....................................: -72D33'14.47" +/- 0.1"
Flux (and units)........................: V = 8.05
Visibility window (if known or relevant): N/A
             Comment on choice of target: Good target for G230L and G285M

# 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: 
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# Special needs of this proposal?

Scheduling: With the current scheduling constraints for the visits, the
     	    three targets will be observed on:                                                                
     HD187691
        Sep 09, Nov 09, Mar 10, Jun 10, Aug 10, Oct 10
     HD6655
        Sep 09, Nov 09, Feb 10, Apr 10, Aug 10, Oct 10
     Feige 48
        Sep 09, Nov 09, Jan 10, Apr 10, Aug 10, Oct 10                            


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:            6   
Required turnaround on analysis (weeks):    
Data volume (Mb needed for analysis):       
Special software needed for analysis? (Describe): 

Description of analysis Plans: