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Space Telescope Imaging Spectrograph
Phase I: MAMA Spectroscopic Dispersion Solution

STIS Cycle-18 Calibration Phase-1

Last Revised:	September 15, 2010	
Proposal ID:	12412	
Title: MAMA Spectroscopic Dispersion Solution
PI: I. Pascucci
Co-I(s):	C. Proffitt

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# Orbit estimates are TOTAL for all of cycle-10; assume 72 weeks) 

Total Prime Orbits:             0
External Parallel Orbits:       0
Internals or no-impact orbits:  7

Comments on orbit estimate:     Annual monitoring program

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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 constrain the wavelength dispersion solutions             

Description: Internal wavecals will be obtained at primary and secondary central wavelengths chosen to cover Cycle 17 use. There is also overlap with choices of configurations used with previous calibration programs which will enable long-term monitoring. This program uses the LINE lamp for a total of approximately 1.5 hours, typically at a lamp current of 10 mA. 

Accuracy:                      0.1 pixels

Comments on Accuracy:   Internal wavelength precision that should be achieved in calibration exposures.  


Products:    Accuracy of the existing MAMA dispersion (_dsp) reference file will assessed and described in the Cycle 17 calibration close-out report. If necessary, a new reference file will be created and delivered along with a supporting Instrument Science Report.  

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# Link to Cycle 17 Science

Fraction of science programs supported by this calibration: 70% 

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:
why: Calibrations can be applied after the observations


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# THE REST OF THIS FORM IS FOR INTERNAL USE
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Observation summary: Wavecals will be obtained for a selected number of
central wavelengths of the 8 gratings (E140H, E140M, G140M, G140L, E230H, E230M, G230M, G230L) used with the MAMA detectors (FUV-MAMA,NUV-MAMA). For all exposures, TARGET=NONE and LAMP=LINE. Different apertures are used with each grating.



Below is a summary table with information about each grating (column 1), central wavelength (column 2), aperture (column 3), and time (column 4).  
                     
   Grat   Wave Aperture Time
E140M  1425  0.2x0.063  663.2
E140H  1271  0.2x0.09   400.

E140H  1343  0.2x0.09   550.
E140H  1598  0.2x0.09   400.5

E230M  1978  0.2x0.063  190.3 
E230M  2415  0.2x0.063  135.
E230M  2561  0.2x0.063  120.
E230M  2707  0.2x0.063  87.2

E230H  1763  0.1x0.09   800.
E230H  2713  0.1x0.09   500.

G140M  1218  52x0.1     450.
G140M  1640  52x0.1     70.
G140L  1425  52x0.1     140.

G230M  1687  52x0.1     300.
G230M  3055  52x0.1     22.

G230L  2376  52x0.049   47.6

E230H  1963  0.1x0.09   800.  




Comments: 1/year

# 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..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: FUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: E140H
Aperture................................: 0.2x0.09
Central Wavelength......................: various(see table above)
Exposure Time...........................: various (see table above)
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: FUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: E140M
Aperture................................: 0.2x0.06
Central Wavelength......................: 1425
Exposure Time...........................: 663 S
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: FUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140M
Aperture................................: 52x0.1
Central Wavelength......................: various (see above)
Exposure Time...........................: various (see table above)
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: FUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G140L
Aperture................................: 52x0.1
Central Wavelength......................: 1425
Exposure Time...........................: 140
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: NUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: E230H
Aperture................................: 0.1x0.09
Central Wavelength......................: various(see table above)
Exposure Time...........................: various (see table above)
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: NUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: E230M
Aperture................................: 0.2x0.06
Central Wavelength......................: various (see table above)
Exposure Time...........................: various (see table above)
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: NUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G230M
Aperture................................: 52x0.1
Central Wavelength......................: various (see supported)
Exposure Time...........................: various (see table above)
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

Target or lamp..........................: NONE
Type of Acquisition.....................: none - internal
Detector for observation................: NUV-MAMA
Operating mode .........................: ACCUM
Spectral Element........................: G230L
Aperture................................: 52x0.05
Central Wavelength......................: 2376
Exposure Time...........................: 48
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: (see table from IDT)
BOP Predicted Global Count Rate for MAMA: (see table from IDT)
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: LAMP=LINE
Comments: (e.g. if monitoring, specify frequency)

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# Special needs of this proposal?

Scheduling: no constraints

Prerequisites: none

PDB update?               N
On-board table update?    N
# 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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# Analysis Plan

Expected FTE weeks for analysis:   4 weeks                             
Required turnaround on analysis (weeks):   not critical                     
Data volume (Mb needed for analysis):    300 Mb                       
Special software needed for analysis? (Describe): Custom IDL software may be needed to create new dispersion (_dsp) reference files.

Description of analysis Plans:	
Raw wavecal images will be self-calibrated using Calstis software. Existing wavelength solutions will be tested with available software within IRAF.