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Hubble Space Telescope
COS Documents

Newletters (STANs) Space Telescope Analysis Newsletters (STANs) are sent to observers via email, whenever there is news that may affect observation planning or analysis.
Instrument Handbook The Instrument Handbook is the primary guide to the characteristics and use of the instrument. It is also available in PDF format.
Data Handbook The HST Data Handbook is the primary reference for data format and analysis information.
Instrument Science Reports ISRs are technical reports written by the COS Group staff about various aspects of the instrument and data. They usually contain in depth information about a specific topic.
Calibration Workshop Papers The 2010 workshop presentations included a variety of COS-related subjects ranging from its commissioning and characterization to the most recent advances in data calibration.
Conference Posters COS posters presented at various conferences.
Information Brochure May 2012 The COS Information Brochure contains an overview of the instrument's capabilities (PDF).

Document Request

If you wish to obtain a paper copy of any of our documents please use the attached form. Be sure to give us an email address and a postal address so we can be sure that the requested documents reach you.

New in the Last 45 Days

July 2018 STAN
In this Newsletter we inform the community about the release of a new version of the HSLA which can be used in support of Cycle 26 proposal preparation.
COS Team 09 Jul 2018

June 2018 STAN
In this Newsletter we provide information on new central wavelengths offered in the FUV channel, action required for the 800 cenwave for ETC calculations for Phase I proposals, updates to the background levels and throughputs in the ETC, and community generated airglow templates.
COS Team 25 Jun 2018

ISR 2018-14: Exploratory Phase for Optimizing Lifetime Position 4 of the COS/FUV Detector
In order to mitigate gain-sag effects, COS/FUV science spectra are periodically moved to pristine locations of the detector, i.e. different lifetime positions (LP). This ISR describes the LP4 exploratory phase, during which the feasibility of placing LP4 at -2.5'' below LP3 (-5'' below LP1) was examined, the effects of the LP4 move on the science quality and calibration accuracy of spectra were investigated, and the final location of LP4 (- 2.5'' below LP3) was determined. We describe in detail the strategy adopted for the LP4 exploratory phase to ensure that all potential issues were identified and resolved well in advance of the LP4 move.
J. Roman-Duval 05 Jun 2018 (pdf)