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Space Telescope Imaging Spectrograph
Phase I CCD Imaging Flats

STIS Cycle-17 Calibration Phase-1 Template

Last Revised:                   27 August 2009
Proposal ID:                    11853
Title:                          STIS/CCD Imaging Flats
PI:                             Charles Proffitt
Co-I(s):                        Sami-Matias Niemi

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# Orbit estimates are TOTAL for all of cycle-17; 

Total Prime Orbits:             0
External Parallel Orbits:       0
Internals or no-impact orbits:  12
Comments on orbit estimate:     1 orbit / 7 weeks for 50CCD and F28X50LP, =8
                                1 orbit every 6 months for F28XOII, =2
                                1 orbit every 6 months for F28XOIII =2

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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:                        Investigate flat-field stability over
                                a monthly period. 

Description:                    Once every 7 weeks, obtain a series of CCD
                                flats using the MIRROR with the unfiltered
                                50CCD aperture and the filtered F28X50LP
                                aperture. These will be used to monitor the
                                characteristics of the CCD reponse, and to
                                look for the development of new cosmetic
                                defects. Once per cycle, flats will also be        
                                obtained using the F28X50OII and the
                                F28X50OIII filters. Continuation of cycle 12
                                program 10024.

Accuracy:                       0.5% pixel-to-pixel (except 0.8% for OII)

Comments on Accuracy:           How accurately one can flatten one's science
                                data and obtain photometry.

Products:                       Reference files, and an ISR.




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# THE REST OF THIS FORM IS FOR INTERNAL USE


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Observation summary:  Every 2 monts, obtain 5 flats with 50CCD aperture and 
                      MIRROR, and 5 flats with F28x50LP and MIRROR, on the
                      CCD in rapid succession using the Tungsten lamp.
                      Every 6 months, obtain 5 flats with F28XOII and 5
                      flats with F28XOIII using the Tungsten lamp.

# Target information (copy for each target)

Target Name.............................:CCDFLAT
Flux (and units)........................:Tungsten Lamp

# 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..........................: Tungsten
Type of Acquisition.....................: n/a
Detector for observation................: CCD
Operating mode .........................: ACCUM
Spectral Element........................: MIRROR
Aperture................................: 50CCD
Central Wavelength......................: n/a
Exposure Time...........................: 0.3s, crsplit=no
Number of Iterations ...................: 5
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: GAIN=4
Comments: monitoring, monthly

Target or lamp..........................: Tungsten
Type of Acquisition.....................: n/a
Detector for observation................: CCD
Operating mode .........................: ACCUM
Spectral Element........................: MIRROR
Aperture................................: F28X50LP
Central Wavelength......................: n/a
Exposure Time...........................: 0.3s, crsplit=no
Number of Iterations ...................: 5
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: GAIN=4
Comments: monitoring, monthly

Target or lamp..........................: Tungsten
Type of Acquisition.....................: n/a
Detector for observation................: CCD
Operating mode .........................: ACCUM
Spectral Element........................: MIRROR
Aperture................................: F28X50OII
Central Wavelength......................: n/a
Exposure Time...........................: 180s, crsplit=no
Number of Iterations ...................: 5
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: GAIN=4
Comments: monitoring, once per 6 months

Target or lamp..........................: Tungsten
Type of Acquisition.....................: n/a
Detector for observation................: CCD
Operating mode .........................: ACCUM
Spectral Element........................: MIRROR
Aperture................................: F28X50OIII
Central Wavelength......................: n/a
Exposure Time...........................: 180s, crsplit=no
Number of Iterations ...................: 5
ETC PID IDs for Count Rates.............: n/a
Special Requirements or options.........: GAIN=4
Comments: monitoring, once per 6 months


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# Special needs of this proposal?

Scheduling: 50CCD+F28X50LP monthly (together in one orbit) thoughout Cycle 17,
            F28XOII once per 6 months (one orbit each time),
            F28XOIII once per 6 months (one orbit each time)

Prerequisites: n/a

PDB update?      n/a
On-board table update?  n/a

# 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
# Use the GO + GTO Phase 1 exposure listing and derived statistics
# posted on WWW.

Fraction of science programs supported by this calibration: 2% STIS

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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# Analysis Plan

Expected FTE weeks for analysis:                                0.5/month
Required turnaround on analysis (weeks):                        < 1/month 
Data volume (Mb needed for analysis):                           150MB
Special software needed for analysis? (Describe):               no

Description of analysis Plans:  We will obtain the flats and monitor both
                                their variations and the developement of
                                any cosmetic defects. Will wait for 3 months
                                worth of data before attempting to build new
                                flat.