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COS Cycle 19 Calibration - Phase I Template

Last Revised: Jul 25 2011
Proposal ID: 12722
Title: NUV Internal/External Wavelength Scale Monitor
PI: Cristina Oliveira
Co-I(s):

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# Orbit estimates are TOTAL for all of cycle-19; assume 52 weeks)

Total Prime Orbits: 3
External Parallel Orbits: 0
Internals or no-impact orbits: 0
Comments on orbit estimate: 1 orbit visits, observations spaced
throughout the year, approximately every 4 months.
******** NOTE: The settings used to monitor the wavelength scale might be
adjusted/modified once the exposure list for Cy 19 is available *******
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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:
This program monitors the offsets between the wavelength scale set by the
internal wavecal versus that defined by absorption lines in external targets.
Description:
This program monitors the offset between the internal and external
wavelength scales: this offset is referred to as "DELTA" in the wavelength dispersion reference file and corrects for the shift between the WCA and PSA in TV03 versus the shift between the WCA and PSA in orbit : (WCA-PSA_)_TV03 - (WCA - PSA)_orbit. Analysis of TV data indicates that this DELTA (offset) is cenwave and FPPOS independent for a particular grating, but it is grating and stripe dependent. To verify and monitor this, this program observes some cenwaves at different FPPOS.
Accuracy: Uncertainties of the wavelength scales are given in table 4 of COS ISR 2010-05
Comments on Accuracy: (How that accuracy is to be interpreted)
Products:
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# Link to Cycle 19 Science
# Use the GO + GTO Phase 1 exposure listing and derived statistics
# posted on WWW.

Fraction of science programs supported by this calibration:
11% of COS 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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# THE REST OF THIS FORM IS FOR INTERNAL USE
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Observation summary:
(e.g. Take spectra of G191B2B at each supported central wavelength
of each grating with the CCD and the 52x0.5 slit.)

# Target information (copy for each target)

Target Name.............................: HD6655
RA......................................: 01 05 18.2073 +/- 0.1"
Dec.....................................: -72 33 14.47 +/- 0.1"
Flux (and units)........................: V=8.05
Visibility window (if known or relevant):
Comment on choice of target:
*** See program 11900 (NUV wavelength monitoring in Cy 17) as this target was observed there ****

# 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):

ALL VISITS OBSERVE THE SAME TARGET, WITH THE SAME SETTINGS

EXPOSURE 01 + EXPOSURE 02
Target or lamp..........................: HD6655
Type of Acquisition.....................: ACQ/PEAKXD x2
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G230L
Aperture................................: PSA
Central Wavelength......................: 2635
Exposure Time...........................: 1.5 sec
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.........:

EXPOSURE 03
Target or lamp..........................: HD6655
Type of Acquisition.....................: ACQ/PEAKD
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G230L
Aperture................................: PSA
Central Wavelength......................: 2635
Exposure Time...........................: 1 sec
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.........:

EXPOSURE 04
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G230L
Aperture................................: PSA
Central Wavelength......................: 2635 FP-POS=3
Exposure Time...........................: 80 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 10.805
BOP Predicted Global Count Rate for MAMA: 9828.3
ETC PID IDs for Count Rates.............: COS.A362587
Special Requirements or options.........:

EXPOSURE 05
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G230L
Aperture................................: PSA
Central Wavelength......................: 2950 FP-POS=3
Exposure Time...........................: 80 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 9.606
BOP Predicted Global Count Rate for MAMA: 13042.264
ETC PID IDs for Count Rates.............: COS.A362589
Special Requirements or options.........:

EXPOSURE 06
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G230L
Aperture................................: PSA
Central Wavelength......................: 3000 FP-POS=3
Exposure Time...........................: 80 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 9.588
BOP Predicted Global Count Rate for MAMA: 13121.3
ETC PID IDs for Count Rates.............: COS.A362590
Special Requirements or options.........:

EXPOSURE 07
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G285M
Aperture................................: PSA
Central Wavelength......................: 2676 FP-POS=3
Exposure Time...........................: 90 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 0.613
BOP Predicted Global Count Rate for MAMA: 2137.87
ETC PID IDs for Count Rates.............: COS.A362592
Special Requirements or options.........:

EXPOSURE 08
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G225M
Aperture................................: PSA
Central Wavelength......................: 2217 FP-POS=3
Exposure Time...........................: 440 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 0.280
BOP Predicted Global Count Rate for MAMA: 1391.82
ETC PID IDs for Count Rates.............: COS.A362582
Special Requirements or options.........:


EXPOSURE 09
Target or lamp..........................: HD6655
Type of Acquisition.....................: TIME-TAG
Detector for observation................: NUV
Operating mode .........................: TIME-TAG
Spectral Element........................: G185M
Aperture................................: PSA
Central Wavelength......................: 2010 FP-POS=3
Exposure Time...........................: 860 sec
Number of Iterations ...................: 1
BOP Predicted Local Count Rate for MAMA.: 0.155
BOP Predicted Global Count Rate for MAMA: 752.667
ETC PID IDs for Count Rates.............: COS.A362597
Special Requirements or options.........:


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# Special needs of this proposal?

Scheduling: Visits will be scheduled throughput the year, at roughly 4 month intervals.

Prerequisites: (e.g., specific SMOV proposal; command development?)

PDB update? (Specify table name if known e.g. SIAF).
On-board table update? (Specify table name if known e.g. CCDBadPixelTable)

# 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: 3
Required turnaround on analysis (weeks): 0
Data volume (Mb needed for analysis): 0
Special software needed for analysis? (Describe):

Description of analysis Plans: (1-2 paragraphs): Centroids of absorption lines will be measured from the calibrated x1d files for the different epochs and compared between themselves, and with centroids determined from analysis of STIS data.