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STIS Cycle-22 Calibration Phase-1

Last Revised: Aug 20, 2014
Proposal ID: 13981
Title: CCD Dark Monitor Part 2
PI: Joanna Taylor
Co-I(s): Svea Hernandez
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# Orbit estimates are TOTAL for all of cycle-22; assume 26 weeks
# 01 May 2015 to 31 October 2015

Total Prime Orbits: 0
External Parallel Orbits: 0
Internals or no-impact orbits: 368
Comments on orbit estimate: Orbits will occur twice a day
starting in May 2015 and ending in October 2015.


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# This section should be written with a GO audience in mind --

Purpose: Monitor the darks for the STIS CCD.


Description: Obtain darks at GAIN=1 in order to monitor CCD
behaviour and chart growth of hot and bad pixels. Check how
well the anneals work for the CCD. All exposures are internals
and fit in occultation orbits.
In addition to routine monitoring, one month of 60s daily darks
will be replaced with AMP=A 60s darks to conduct a measure of
the absolute CTI as a function of the number of transfers in
the STIS CCD using warm pixels and a direct comparison to typical
AMP=D 60s darks. We will schedule this month during periods when
the STIS CCD is not being heavily used, thus mitigating any
potential impact to GOs.

Accuracy: < 0.012 e-/s, S/N > 1.0

Comments on Accuracy: Superdark rms < 0.012 e-/s and S/N > 1.0

Products: Weekly CDBS reference files (superdarks) and
a summary in the end of cycle 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.............................: n/a (internal)
RA.............................................: n/a
Dec...........................................: n/a
Flux (and units)........................: n/a
Visibility window (if known or relevant): n/a
Comment on choice of target: n/a

# Table of exposures (copy for each exposure):

Target or lamp..........................: DARK
Type of Acquisition.....................:
Detector for observation................: STIS/CCD
Operating mode .........................:
Spectral Element........................: DEF
Aperture................................: DEF
Central Wavelength......................:
Exposure Time...........................: 1100s
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: Take exposure twice a day

Target or lamp..........................: DARK
Type of Acquisition.....................:
Detector for observation................: STIS/CCD
Operating mode .........................:
Spectral Element........................: DEF
Aperture................................: DEF
Central Wavelength......................:
Exposure Time...........................: 60s
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: Take exposure four times a day.

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# Special needs of this proposal?

Scheduling: Schedule twice a day. Start on May 01, 2015.

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 22 Science

Fraction of science programs supported by this calibration:
26% of STIS total exposure time.

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: 2
Required turnaround on analysis (weeks): 2
Data volume (Mb needed for analysis): 10.5Mb
Special software needed for analysis? (Describe):
basedarkT, weekdarkT, and daydarkT are needed for the creation of
the superdarks. The 'T' means that there is correction within
each of these procedures that normalizes the temperature on the
Side-2 electronics. Superdarks are created automatically with a
pipeline.

Description of analysis Plans: Retrieve darks and construct superdarks.
These superdarks are compared to previous superdarks and the
image ststistics are checked to see if there are any anomalous
statistical deviations.