2016
ISR 2016-01: Optimization of Lifetime Position 3 of the COS/FUV Detector
In this ISR, we describe the process for selecting the LP3 location, and the subsequent requirements for the new extraction algorithm supporting science at LP3.
J. Roman-Duval
25 Feb 2016
2015
ISR 2015-05: Verification of COS/FUV Bright Object Aperture (BOA) Operations at Lifetime Position 3
We report the results of the COS/FUV calibration program LCAL4, designed to verify operations and performance of the bright object aperture (BOA) at the third lifetime position (LP3).
A. Fox
10 Dec 2015
ISR 2015-03: Changes to the COS Extraction Algorithm for Lifetime Position 3
The COS FUV Detector Lifetime Position 3 (LP3) has been placed only 2.5” below the original lifetime position (LP1). This is sufficiently close to gain-sagged regions at LP1 that a revised extraction algorithm is needed to ensure good spectral quality. We provide an overview of this new “TWOZONE” extraction algorithm, discuss its strengths and limitations, describe new output columns in the X1D files that show the boundaries of the new extraction regions, and provide some advice on how to manually tune the algorithm for specialized applications.
C. Proffitt
25 Sep 2015
ISR 2015-06: Summary of the COS Cycle 21 Calibration Program
We summarize the Cycle 21 calibration program for the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, covering the time period from November 2013 through October 2014. We give an overview of the Calibration plan and status summaries for each of the individual proposals comprising the C21 Calibration program.
H. Sana
25 Sep 2015
ISR 2015-02: Summary of the COS Cycle 20 Calibration Program
We summarize the Cycle 20 calibration program for the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, covering the time period from November 2012 through October 2013. We give an overview of the Calibration plan and status summaries for each of the individual proposals comprising the C20 Calibration program.
J. Roman-Duval
11 Jun 2015
ISR 2015-01: The COS/FUV Focus Sweep Program at Lifetime Position 3 (LENA2/13635)
We present the results from the focus sweeps performed in July 2014 in preparation for the move to lifetime position 3 with the G130M, G160M, and G140L gratings using the bright stars Feige 48 and AzV75 as targets.
A. Fox
20 May 2015
2014
ISR 2013-13: COS/FUV Characterization of Optical Effects at Potential Lifetime Positions
In this document we provide a summary of the analysis performed on data obtained as part of program 12678, "COS/FUV Characterization of Optical Effects". Changes to throughput, resolution and gain as a function of position were evaluated and compared to raytrace models.
D. Sahnow
24 Apr 2015
ISR 2014-01: Summary of the Cycle 19 COS Calibration Program
We summarize the Cycle 19 calibration program for the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope, covering the time period from November 2011 through October 2012. We give an overview of the Calibration Plan and status summaries for each of the individual proposals comprising the C19 Calibration program.
J. Roman-Duval
16 Jul 2014
ISR 2013-09: Updated Absolute Flux Calibration of the COS FUV Modes
We present newly derived point source absolute flux calibrations for the COS FUV modes at both the original and second lifetime positions.
D. Massa
14 Mar 2014
2013
ISR 2013-16: Summary of Results from the First Move to a New COS FUV Lifetime Position
We summarize the results of the enabling and calibration activities involved in the first COS FUV move to a new lifetime position, which occurred on July 23, 2012.
R. Osten
08 Oct 2013
ISR 2013-08: Characterization of the COS FUV Detectors
This document describes the results derived from the COS calibration Program 12676, "COS/FUV Characterization of Detector Effects".
D. Massa
01 Oct 2013
ISR 2013-06: COS FUV Dispersion Solution Verification at the New Lifetime Position
In this report, we describe the analysis we performed to verify the dispersion solutions of the M gratings using data collected in 12805 and of the L grating using data obtained in enabling program 12796 (FENA3:“Second COS FUV Lifetime Position: Focus Sweep Enabling Program”; Oliveira et al. 2013).
P. Sonnentrucker
10 Jun 2013
ISR 2013-07: COS/FUV Spatial and Spectral Resolution at the new Lifetime Position
In this ISR we characterize the spatial and spectral resolution at the second COS FUV lifetime position.
J. Roman-Duval
10 Jun 2013
The document describes the analysis of data taken as part of the second lifetime calibration program 12807. This program was designed to characterize the BOA spectroscopic performance at the second lifetime position.
J. H. Debes
22 May 2013
ISR 2013-04: Summary of COS Cycle 18 Calibration Programs
This document summarizes the status of the calibration programs for COS during Cycle 18.
G. Kriss
26 Apr 2013
This document describes the analysis of the data obtained for proposal 12795 which determined the exact updates for the Science Instrument Aperture File (SIAF) and for the COS aperture block positioning needed to implement routine science operations at COS FUV Lifetime Position 2.
C. Proffitt
08 Apr 2013
ISR 2013-02: COS/FUV Mapping of Stray PtNe Lamp Light Through the FCA
This ISR reviews the causes of the shutdown program 12096 and how program 12677 was crafted to avoid a similar shutdown. The document presents results from program 12677 and their impact on future lifetime position is discussed.
C. Oliveira
07 Feb 2013
This document describes the results from the second lifetime position focus sweep with COS/FUV G130M, G160M, and G140L gratings as part of the programs executed to enable COS/FUV science at the second lifetime position.
C. Oliveira
06 Feb 2013
2012
ISR 2012-02: Summary of COS Cycle 17 Calibration Program
This document summarizes the status of the calibration programs for COS during Cycle 17.
R.Osten
29 Nov 2012
ISR 2012-01: COS FUV Focus Determination for the G140L Grating
Describes the procedures for determining the COS FUV fine-focus for the G140L grating.
P. Ghavamian
03 Oct 2012
2011
ISR 2010_11: COS FUV Detector Dark Rates During SMOV and Cycle 17
This ISR describes the behavior and characteristics of the COS FUV detector dark rate during SMOV and Cycle 17.
D. Sahnow
07 Oct 2011
ISR 2011-05: Gain sag in the FUV detector of the Cosmic Origins Spectrograph
SPIE paper describing the characteristics and mitigation strategies of gain sag in the FUV detector.
David J. Sahnow, Cristina Oliveira, Alessandra Aloisi, Philip E.
Hodge, Derck Massa, Rachel Osten, Charles Proffitt, Azalee
Bostroem, Jason B. McPhate, StИphane BИland, Steven N. Osterman
and Steven V. Penton, "Gain sag in the FUV detector of the Cosmic
Origins Spectrograph", Proc. SPIE 8145, 81450Q (2011);
http://dx.doi.org/10.1117/12.893989
Copyright 2011 Society of Photo-Optical Instrumentation Engineers.
One print or electronic copy may be made for personal use only.
Systematic reproduction and distribution, duplication of any
material in this paper for a fee or for commercial purposes, or
modification of the content of the paper are prohibited.
D. Sahnow
26 Sep 2011
ISR 2011-04: Details of COS TAGFLASH Execution
Describes the characteristics of COS TAGFLASH exposures.
T. Keyes
07 Sep 2011
ISR 2011-03: COS FUV Gridwire Flat Field Template
Results of the FUV Gridwire Flat Field Development and Testing.
J. Ely
05 Aug 2011
ISR 2011-02: Updated Results from the COS Spectroscopic Sensitivity Monitoring Program
Updated Results from the COS Spectroscopic Sensitivity Monitoring Program.
R. Osten
28 Jun 2011
ISR 2010_12: COS NUV Detector Dark Rates During SMOV and Cycle 17
This ISR describes the behavior and characteristics of the COS NUV detector dark rate during SMOV and Cycle 17.
D. Sahnow
12 Jul 2011
ISR 2010_13: SMOV: COS FUV and NUV On-Orbit Structural and Thermal Stability
This ISR provides a description and analysis of the structural and thermal stability of the COS instrument.
T. Ed Smith
12 Jul 2011
ISR 2011-01: Improved Medium Resolution Line Spread Function for the COS FUV Spectrum
We have developed an improved line spread function (LSF) for the medium resolution far- ultraviolet gratings (G130M and G160M) of the Cosmic Origins Spectrograph (COS) by taking into account scattering in the far wings due to microroughness on the HST primary mirror.
G. Kriss
18 Mar 2011
2010
ISR 2010-10: SMOV: COS NUV Imaging Performance
Presenting data analysis to describe NUV Imaging Performance for COS after SM4. Revised 10/6/2010
P. Goudfrooij
11 Mar 2010
ISR 2010-08: SMOV: COS NUV External Spectroscopic Performance
Describes the external spectroscopic performance of the COS NUV detector
S. BИland
30 Sep 2010
ISR 2010-09: COS FUV External Spectroscopic Performance
A description of the External Spectroscopic Performance of the FUV Channel on COS
P. Ghavamian
30 Sep 2010
ISR 2010-15: Early Results from the COS Spectroscopic Sensitivity Monitoring Programs
We report initial results from the Cosmic Origins Spectrograph spectroscopic sensitivity monitoring calibration programs.
R. Osten
02 Aug 2010
ISR 2010-14: COS Target Acquisition Guidelines, Recommendations, and Interpretation
This ISR provides an overview of COS TA and updates, expands, and supersedes information in the COS IHB(v2)
T. Keyes
15 Jun 2010
ISR 2010-07: SMOV: COS FUV Focus Determination
The procedures for determining the COS FUV fine-focus are described
D. Lennon
04 Mar 2010
ISR 2010-05: SMOV: COS NUV Wavelength Calibration
Update to the NUV wavelength calibration from SMOV
C. Oliveira
19 Feb 2010
ISR 2010-06: SMOV: COS FUV Wavelength Calibration
Update to the FUV wavelength calibration from SMOV data
C. Oliveira
19 Feb 2010
ISR 2010-04: SMOV: COS NUV On-orbit Optical Alignment
SMOV NUV optical alignment process description
G. Hartig
12 Feb 2010
ISR 2010-01: SMOV Absolute Flux Calibration of the COS NUV Modes
Describes the processes used to determine the absolute flux calibration of COS NUV point source spectra
D. Massa
28 Jan 2010
ISR 2010-02: SMOV Absolute Flux Calibration of the COS FUV Modes
Describes the processes used to determine the absolute flux calibration of COS FUV point source spectra
D. Massa
28 Jan 2010
ISR 2010-03: COS Near-UV Flat Fields and High S/N Determination from SMOV Data
Describes the process of determining and results of the COS NUV high S/N flat field reference files from data taken during SMOV4
T. Ake
04 Feb 2010
2009
ISR 2009-01(v1): Preliminary Characterization of the Post-Launch Line Spread Function of COS
Description of the COS Line Spread Function (LSF) as determined by post-launch testing.
P. Ghavamian
01 Oct 2009
2008
COS ISR 08-01: Phase II Update and Guidelines for Cycle 17 Users of COS
Summary of recommended practice and suggestions for observers preparing their Phase II COS program submissions for Cycle 17.
D. Soderblom
06 Jun 2008
2002
COS ISR 02-01: COS Bright Object Protection
COS Bright Object
Protection
C. Leitherer
07 Mar 2006
1999
COS ISR 99-01: COS Design Reference Mission and Ground System Volume Requirements
COS Design Reference Mission and Ground System Volume Requirements
Charles (Tony) Keyes
07 Mar 2006