Telescopes ISRs

ISR-TEL-2008-02, The COS Pre-Flight Aperture Model and SIAF.dat File
Describes how the SIAF data were prepared for the Cosmic Origins Spectrograph, and gives details of the spreadsheet model.
M. Lallo 09 Sep 2008 (pdf)

ISR-TEL-2008-01, The WFC3 Science Instrument Aperture File (REVISED May 2009)
This report describes how the SIAF data were prepared for the Wide Field Camera 3 with details of the spreadsheet model.
C. Cox 03 Jul 2008 (msword)

ISR-ACS-2007-07, Calibration of ACS/WFC Absolute Scale & Rotation for Use in Creation of a JWST Astrometric Reference FIeld
Describes the ACS absolute scale determination to support JWST calibration requirements via forward calibration.
Roeland P. van der Marel et al. 12 Jul 2007 (pdf)

ISR-TEL-2006-01, Modeling Aberrations in the Advanced Camera for Surveys
Investigates the plausibility of optical misalignments as the cause of apparent aberration changes implied by phase retrieval of HRC PSFs
K. Houairi et al. 13 Oct 2006 (pdf)

ISR-TEL-2005-03, HST Temporal Optical Behavior & Current Focus Status
Reviews the timescales, mechanisms, and importance of variations in aberrations (focus, coma, astigmatism). Presents focus status of the observatory.
M. Lallo et al. 27 Oct 2005 (pdf)

Guiding Errors in 3-Gyro: Experience from WF/PC, WFPC2, STIS, NICMOS and ACS
As background information to support interpretation of results during testing under 2-gyro operation, this report summarizes typical behavior gleaned from several observations with ACS, WF/PC, WFPC2, STIS and NICMOS.
R. L. Gilliland 11 Aug 2005 (pdf)

ISR-TEL-2005-02, Guiding Errors in 3-Gyro: Experience from WF/PC, WFPC2, STIS, NICMOS and ACS
As background information to support interpretation of results during testing under 2-gyro operation, this report summarizes typical behavior gleaned from several observations with ACS, WF/PC, WFPC2, STIS and NICMOS.
R. Gilliland 13 Apr 2005 (pdf)

Observer Anomaly(?): Recent Jitter & PSF Variations
ISR TEL 2005-01 This ISR documents Point Spread Function (PSF) and pointing drifts from a recent 5-orbit program with the HRC of ACS.
R. L. Gilliland 11 Aug 2005 (pdf)

ISR-TEL-2005-01, Recent Jitter and PSF Variations
This ISR documents Point Spread Function (PSF) and pointing drifts from a recent 5-orbit program with the HRC of ACS.
R. Gilliland 13 Apr 2005 (pdf)

ACS field-dependent PSF variations...
Examines PSF width and ellipticity variations over WFC and HRC field resulting from optical and charge diffusion effects.
J. Krist 03 May 2006 (pdf)

HST Focus in Year 2000 - A Review of the Cycle 9 Focus Monitor Program
OTA-2001-01: After the last HST refocusing in June 2000,an enhanced OTA focus monitor(8829) began running as a cycle 9 observatory-level calibration to supplement...
M. Lallo 21 Jun 2002 (pdf)

Modelling HST Focal-Length Variations
Paper on the Modelling HST Focal-Length Variations.
J. Hershey 25 Jun 2002 (pdf)

A Thermal Study of the Early NGST Instrument Module
ISR NGST-01: A study was performed on the GSFC-led design of the NGST Integrated Science Instrument Module (ISIM) to gauge the sensitivities of the optical bench temperatures...
M. Lallo 20 Jun 2002 (pdf)

NICMOS History Database and Web Tools
OSG-CAL-98-01: The history of NICMOS platescale, focus, and coronographic hole data has been stored in a database which is accessible via tools on the World Wide Web. The history tool which allows queries on the data, is available to the public.
C. Tullos 20 Jun 2002 (pdf)

NICMOS Distortion Correction
OSG-CAL-97-07: The NICMOS distortion was measured by a series of images of the star cluster NGC1850.
C. Cox 20 Jun 2002 (pdf)

Velocity Aberration Correction for Parallel Observations
OSG-CAL-97-06: The velocity aberration correction performed by the HST pointing control software is valid for the target direction only...
C. Cox 20 Jun 2002 (pdf)

NICMOS SM-2 SMOV Alignment Results
OSG-CAL-97-04: NICMOS SM-2 SMOV Alignment Results.
O. Lupie 20 Jun 2002 (pdf)

WWW Query Tool for CDBS
OSG-CAL-97-05: Using the World Wide Web, direct query-access has been made to the Calibration Database.
C. Tullos 20 Jun 2002 (pdf)

The Focal Plane Monitoring Program
OSG-CAL-97-02: The OSG runs a focal plane monitoring program, known as the Heptathlon , routinely checking the SIs and FGSs four times a year as a way of assessing trends and stability in the HST focal plane.
C. Cox 20 Jun 2002 (pdf)

Data Quality Assessment Database and a World-Wide Web Interface
OSG-CAL-97-01: We have developed a database to hold this information and a series of World-Wide Web pages to facilitate reporting directly into this database.
C. Tullos 20 Jun 2002 (pdf)

Transforming Non-COSTAR Aperture Positions to the New Vehicle Reference
OSG-CAL-96-06: A major effect of the on-orbit FGS to FGS re-alignment of day 105 1996, was the redefinition of the vehicle reference frame...
M. Lallo 20 Jun 2002 (pdf)

The HST Set of Absolute Standards for the 0.12 micron to 2.5 microns Spectral Range
OSG-CAL-96-05: A proposal to create a homogeneous set of absolute calibration standards covering for the first time the 0.12 micron to 2.5 microns spectral range is described.
L. Colina 20 Jun 2002 (pdf)

CDBS Spectral Atlases of Galaxies and Emission Line Objects
OSG-CAL-96-04: This document explains the content and scope of new spectral atlases of galaxies and galactic emission line objects added to the CDBS astronomical catalog.
L. Colina 20 Jun 2002 (pdf)

OSG Cycle 6 Calibration Plan
OSG-CAL-96-03: This report summarizes the Observatory Support Group calibration plans for Cycle 6.
L. Colina 20 Jun 2002 (pdf)

The 0.12-2.5 micron Absolute Flux Distribution of the Sun for Comparison with Solar Analog Stars
OSG-CAL-96-02: An absolute flux calibrated reference spectrum of the Sun covering the 0.12 to 2.5 micron wavelength range is presented.
L. Colina 20 Jun 2002 (pdf)

Absolute Flux Calibrated Spectrum of Vega
OSG-CAL-96-01: An absolute flux calibrated reference spectrum of Vega, the primary calibration standard in the optical, is presented.
L. Colina 20 Jun 2002 (pdf)

Spectrophotometric Standards from the Far-UV to the Near-IR on the White Dwarf Flux Scale
SCS-007: The second generation instruments to be installed in 1997 on the Hubble Space Telescope (HST) require spectrophotometric standard stars for flux calibrations...
R. Bohlin 20 Jun 2002 (pdf)

Absolute Flux Calibration of Optical Spectrophotometric Standard Stars
SCS-004: A method based on Landolt photometry in B and V is developed to correct for a wavelength independent offset of the absolute flux level of optical spectrophotometric standards.
L. Colina 20 Jun 2002 (pdf)

CDBS Kurucz Stellar Atmosphere Atlas
SCS-006: CDBS Kurucz Stellar Atmosphere Atlas.
L. Colina 20 Jun 2002 (pdf)

White Dwarf Standard Stars: G191-B2B, GD 71, GD 153, HZ 43
SCS-005: White Dwarf Standard Stars: G191-B2B, GD71, GD153, HZ43.
R. Bohlin 20 Jun 2002 (pdf)

Focus Monitoring and Recommendation for Secondary Mirror Move
OTA-18: Focus monitoring and recommendation for secondary mirror move.
S. Casertano 20 Jun 2002 (pdf)

The WFPC2 Scales and Alignments
SOB-94-10-21: WFPC2 observations of the open cluster M67 has been used to establish the scales and rotations with respect to the HST V2 V3 coordinate system.
C. Cox 20 Jun 2002 (pdf)

An Investigation into the Guidance of FOC GTO 4073
SOB-94-06-07: An analysis of the guidance of the 1992 FOC GTO program 4073 was conducted at the request of the PI...
S. Holfeltz 20 Jun 2002 (pdf)

A Multipurpose Pointing Analysis Tool (OBSOLETE!)
SOB-94-02-15: We present software for determining accurate HST attitude from guidestar and velocity data.
C. Cox 20 Jun 2002 (pdf)

A Determination of the Pointing History during FOS Scans of Mars
SOB-93-12-06: We have used pointing software, developed earlier for a comparison with the PASS software, to analyze scans of Mars performed at intervals since June 1992.
C. Cox 20 Jun 2002 (pdf)

Attitude Determination and Target Location
SOB-92-01-01: Attitude Determination and Target Location.
C. Cox 20 Jun 2002 (pdf)

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