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Space Telescope Imaging Spectrograph
Phase I: MAMA Sensitivity and Focus Monitor

STIS Cycle-18 Calibration Phase-1 

Last Revised:		07 October 2010	
Proposal ID:			12414
Title: MAMA Sensitivity and Focus Monitor
PI:	Rachel Osten
Co-I(s):	Charles Proffitt, Azalee Bostroem

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# Orbit estimates are TOTAL for all of cycle-18; assume 52 weeks) 

Total Prime Orbits:             12
External Parallel Orbits:       0
Internals or no-impact orbits:  0
Comments on orbit estimate:     


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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 sensitivity of each MAMA grating mode to detect any change due to  
				contamination or other causes. Also monitor the STIS focus in a 
				spectroscopic and an imaging mode.

Description:                    Obtain exposures in each of the 2 low-resolution MAMA spectroscopic 
				modes every 2 months, in each of the 2 medium-resolution modes
     				once a year, and in each  of the 4 echelle modes every 6 months,
     				using unique calibration standards for each mode, and ratio the
     				results to the first observations to detect any trends. In       
     				addition, each L-mode sequence will be preceded by two 
				spectroscopic ACQ/PEAKs with the CCD/G230LB and crossed linear
     				patterns, with the purpose of measuring the focus (PSF across	
     				the dispersion as a function of UV wavelength); and each 
     				M-mode sequence will be preceded by a CCD/F28X50OII direct image 
				also to monitor the focus. 
Accuracy:                       Minimum S/N of 50 at the wavelength of least sensitivity for L modes,
		                and at the central wavelengths for M and E modes.
           			10% for focus changes, i.e FWHM of the profile across the dispersion.
 
Comments on Accuracy:           
Products:                       Interim reports and ISR on sensitivity monitor.  Wavelength-dependent 
		                trends for implementation as pipeline corrections.  ISR on focus
          			monitors.  If the focus quality is found to degrade significantly, a
          			separate program to take corrective action (such as an adjustment of
          			the STIS tip/tilt mirror) may be implemented.
 


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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:    20% of STIS observations are
FUV-MAMA spectroscopic exposures (by exposure time), 31% use NUV-MAMA spectroscopic exposures.
Broken down further: 11% of STIS exposures are L-mode spectroscopic MAMA observations, 1% are
M-mode, and 39% are echelle modes (by exposure time).

List categories of science which can't be executed until after this proposal:
why:

List categories of science which are best performed contemporaneous with 
this proposal:
why:


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# THE REST OF THIS FORM IS FOR INTERNAL USE
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Observation summary: 
   Observe GRW+70D5824 with L modes, AGK+81D266 with M modes, and BD+28D4211 with E modes.

# Target information (copy for each target)

Target Name.............................: GRW+70D5824	
RA......................................: 13H 38M 51.77S (2000)		
Dec.....................................: +70D 17' 8.5" (2000)		
Flux (and units)........................: V=12.77, B-V=-0.09	
Visibility window (if known or relevant): Constant
Comment on choice of target: Permits access to the same standard throughout the
                             year.  For L modes and spectral focus monitor only.

Target Name.............................: AGK+81D266
RA......................................: 9H 21M 19.06S (2000)
Dec.....................................: +81D 43' 28.6" (2000)
Flux (and units)........................: V=11.92, B-V=-0.33
Visibility window (if known or relevant): Constant
Comment on choice of target: Permits access to the same standard throughout the
                             year.  For GM modes and focus image only.

Target Name.............................: BD+28D4211
RA......................................: 21H 51M 11.07S (2000)
Dec.....................................: +28D 51' 51.8" (2000)
Flux (and units)........................: V=10.52, B-V=-0.34
Visibility window (if known or relevant): Solar Avoidance Feb.-Mar.
Comment on choice of target: For all E modes. 

Target Name.............................: GD153
RA......................................: 12H 57M 0.233S (2000)
Dec.....................................: +22D 01' 52.52" (2000)
Flux (and units)........................: V=13.346
Visibility window (if known or relevant): 
Comment on choice of target: Alternative target for L mode observations when GRW+70D5824 is not
					accessible.

# 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..........................:GRW+70D5824
Type of Acquisition.....................: ACQ /PEAK
Detector for observation................: CCD
Operating mode .........................: ACQ
Spectral Element........................: MIRROR
Aperture................................: F28x50LP
Central Wavelength......................: 
Exposure Time...........................:  1
Number of Iterations ...................: 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.........: GS ACQ SCENARIO BASE1B3

Target or lamp..........................:GRW+70D5824
Type of Acquisition.....................: ACQ 
Detector for observation................: CCD
Operating mode .........................: ACQ/PEAK
Spectral Element........................: G230LB
Aperture................................: 0.1x0.09
Central Wavelength......................: 2375
Exposure Time...........................: 20 
Number of Iterations ...................: 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.........: STEP-SIZE=20, NUM-POS=7, SEARCH=LINEARAXIS2

Target or lamp..........................:GRW+70D5824
Type of Acquisition.....................: ACQ 
Detector for observation................: CCD
Operating mode .........................: ACQ/PEAK
Spectral Element........................: G230LB
Aperture................................: 0.1x0.09
Central Wavelength......................: 2375
Exposure Time...........................:  20
Number of Iterations ...................: 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.........: STEP-SIZE=20, NUM-POS=7, SEARCH=LINEARAXIS2

Target or lamp..........................:GRW+70D5824
Type of Acquisition.....................: 
Detector for observation................: FUV/MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140L
Aperture................................: 52x2
Central Wavelength......................: 1425
Exposure Time...........................:  204
Number of Iterations ...................: 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.........: 

Target or lamp..........................:GRW+70D5824
Type of Acquisition.....................: 
Detector for observation................: NUV/MAMA
Operating mode .........................: ACCUM 
Spectral Element........................: G230L
Aperture................................: 52x2
Central Wavelength......................: 2376
Exposure Time...........................:  204
Number of Iterations ...................: 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.........: 
Comments: observations every 2 months


Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: ACQ
Detector for observation................: 
Operating mode .........................:  ACQ
Spectral Element........................: MIRROR
Aperture................................: F28x50LP
Central Wavelength......................: 
Exposure Time...........................:  1
Number of Iterations ...................: 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.........: 

Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: 
Detector for observation................: CCD
Operating mode .........................: ACCUM
Spectral Element........................: MIRROR
Aperture................................: F28x50OII
Central Wavelength......................: 
Exposure Time...........................: 90 
Number of Iterations ...................: 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.........: GAIN=4, CR-SPLIT=2, CENTERAXIS=256

Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: 
Detector for observation................: FUV/MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140M
Aperture................................: 52x2
Central Wavelength......................: 1567
Exposure Time...........................: 300 
Number of Iterations ...................: 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.........: 

Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: 
Detector for observation................: FUV/MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140M
Aperture................................: 52x2
Central Wavelength......................: 1567
Exposure Time...........................:  204
Number of Iterations ...................: 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.........: 

Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: 
Detector for observation................: FUV/MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140M
RAperture................................: 52x2
Central Wavelength......................: 1173
Exposure Time...........................:  204
Number of Iterations ...................: 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.........: 

Target or lamp..........................:AGK+81D266
Type of Acquisition.....................: 
Detector for observation................: NUV/MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G230M
Aperture................................: 52x2
Central Wavelength......................: 2818
Exposure Time...........................:  480
Number of Iterations ...................: 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.........: 
Comments: observations once a year

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: ACQ
Detector for observation................: CCD
Operating mode .........................:  
Spectral Element........................:MIRROR 
Aperture................................: F28x50LP
Central Wavelength......................: 
Exposure Time...........................: 0.1 
Number of Iterations ...................: 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.........: 

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: 
Detector for observation................:NUV/MAMA 
Operating mode .........................:  ACCUM
Spectral Element........................: E230H
Aperture................................: 0.2x0.2
Central Wavelength......................: 2263
Exposure Time...........................: 1476 
Number of Iterations ...................: 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.........: 

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: 
Detector for observation................:FUV/MAMA 
Operating mode .........................:  ACCUM
Spectral Element........................: E140M 
Aperture................................: 0.2x0.2
Central Wavelength......................: 1425
Exposure Time...........................:  350
Number of Iterations ...................: 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.........: 

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: 
Detector for observation................:FUV/MAMA 
Operating mode .........................:  ACCUM
Spectral Element........................: E140H
Aperture................................: 0.2x0.2
Central Wavelength......................: 1416
Exposure Time...........................:  1040
Number of Iterations ...................: 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.........: 

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: 
Detector for observation................:NUV/MAMA 
Operating mode .........................:  ACCUM
Spectral Element........................: E230M
Aperture................................: 0.2x0.2
Central Wavelength......................: 1978
Exposure Time...........................: 516 
Number of Iterations ...................: 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.........: 

Target or lamp..........................:BD+28D4211
Type of Acquisition.....................: 
Detector for observation................:NUV/MAMA 
Operating mode .........................:  ACCUM
Spectral Element........................: E230M
Aperture................................: 0.2x0.2
Central Wavelength......................: 2707
Exposure Time...........................:  438
Number of Iterations ...................: 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.........: 

Comments: observations twice during cycle 18 


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# Special needs of this proposal?

Scheduling:  as specified above

Prerequisites: 

PDB update?               
On-board table update?    

# Special Requirements:
Real time?                N
Special commanding?       Yes--Monthly MAMA offsets are 
                          to be canceled and centering returned to nominal 
                          for all exposures in this program. 
Quick Data turnaround?    N
Special timing required?  N
Other?                    N
Describe (& justify) special requirements: Eliminate a spatial sensitivity 
                                           variable to permit tracking of any 
                                           small temporal variations.



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# Analysis Plan


Expected FTE weeks for analysis: 4 for sensitivity, 4 for focus                
Required turnaround on analysis (weeks): 4 for sensitivity, 4 for focus  
Data volume (Mb needed for analysis): 300 for sensitivity, 200 for focus        
Special software needed for analysis? (Describe): IRAF/IDL scripts in place 
   and under development.
Description of analysis plans: Prepare comparative plots relative to baseline
   within 4 weeks of each sensitivity observation set; prepare interim and final
   reports on same.  Develop wavelength-dependent analysis for pipeline
   corrections, and analyze cumulative echelle exposures.  Reconstruct sampled 
   PSF from ACQ/PEAK fluxes at dwell points and compare profiles with previous 
   observations; final ISR on same.