STScI Logo

Hubble Space Telescope
NICMOS Image Quality

The high image quality of NICMOS can be characterized by the Strehl ratio of the PSF, namely the ratio of the observed PSF to the TinyTim PSF peak fluxes. This ratio is very high for NICMOS, ranging from 0.8 to 0.9 at all wavelengths and in all cameras at their optimal focus. Important information on Image Quality can be found in the Image Quailty section of Chapter 4 of the NICMOS Instrument Handbook. For more specific details on NICMOS image quality, follow the links to the documents listed below.


NICMOS Image Quality Documentation

Advisories:
Important updates, discoveries and developments that could potentially affect NICMOS observations, calibration, or data analysis.

FAQs:
Frequently Asked Questions.

Performance Summaries:
Status reports reflecting the current understanding of instrument characteristics, performance and calibration.

Handbooks:
The NICMOS Instrument Handbook is the primary guide regarding the characteristics and use of the instrument. The HST Data Handbook is the primary guide for calibration, reduction and analysis of NICMOS data.

Instrument Science Reports:
ISRs are technical reports written by members of the NICMOS Group about various aspects of the instrument and data. They usually contain in-depth information about specific topics.

NICMOS ISR 2002-004: SM3b Science Flats
L. Mazzuca 06 Oct 2002

NICMOS ISR 2002-002: NICMOS Cycle 10 Interim Calibration Plan
S. Arribas 14 Mar 2002

NICMOS ISR-99-011: Long-Term Trends in the NICMOS Camera 2 Obscuration Pattern and Aberrations
J. Krist 15 Nov 1999

NICMOS ISR-99-008: GROT in NICMOS Cameras
M. Sosey 20 Sep 1999

NICMOS ISR-99-007: NIC 2 Growth Curves
S. Holfeltz 13 Sep 1999

NICMOS ISR-99-003: NICMOS Optical Aberrations: Coma and Astigmatism
A. Suchkov 10 Jun 1999

NICMOS ISR-98-018: TinyTim modeling of NICMOS PSF subtraction: Effects of Focus Breathing, Cold Mask Wiggling, and Color Variations
A. Suchkov 11 Nov 1998

NICMOS ISR-98-015: NICMOS Focus and HST Breathing
A. Suchkov 15 Sep 1998

NICMOS ISR-98-013: Second NIC3 Campaign Results
A. D. Storrs 13 Jul 1998

NICMOS ISR-98-009: Focus Variation and the Orbital Phase of Observations
A. Storrs 14 May 1998

NICMOS ISR-98-007: Possible Evidence for NICMOS Focus 'Precessional Breathing'
A. Suchkov 01 May 1998

NICMOS ISR-98-005: NICMOS Focus Field Variations (FFV) and Focus Centering
A. Suchkov 16 Mar 1998

NICMOS ISR-98-004: NICMOS Focus Monitoring
A.Suchkov 16 Mar 1998

Papers and Proceedings:
Selected NICMOS related published papers and workshop proceedings.

NICMOS Flyer for June 2002 AAS Meeting

Tutorials:
Cookbook style instructions, prescribed procedures, and helpful tips.

Examples:
Examples of how to use various NICMOS-related tools, calibration and analysis techniques.

Space Telescope Analysis Newsletters:
STANs contain useful information regarding calibration and data reduction.