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Hubble Space Telescope
Cosmic Origins Spectrograph

Late Breaking News

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

News Archive

Cosmic Origins Spectrograph

The Cosmic Origins Spectrograph (COS) was installed on the Hubble Space Telescope (HST) in May 2009. COS is designed to perform high-sensitivity, medium- and low-resolution spectroscopy of astronomical objects in the 1150-3200 wavelength range. COS significantly enhances the spectroscopic capabilities of HST at ultraviolet wavelengths, providing observers with unparalleled opportunities for observing faint sources of ultraviolet light.

The primary science objectives of the mission are the study of the origins of large scale structure in the Universe, the formation and evolution of galaxies, the origin of stellar and planetary systems, and the cold interstellar medium.

More information and documentation on the Cosmic Origins Spectrograph can be found at CASA, the University of Colorado's Center for Astrophysics and Space Astronomy, Ball Aerospace, and the Experimental Astrophysics Group at the University of California - Berkeley.

Documents Added
in the Last 45 Days

COS Instrument Handbook for Cycle 25
A. Fox Jan 2017

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)

Document Archive

New
in the Last 45 Days