New Gapless COS G140L Mode Proposed for Background-limited Far-UV Observations
Anderson, Scott F.; France, Kevin; Fleming, Brian; Zheng, Wei; Howk, J. Christopher; McCandliss, Stephan R.; Redwine, Keith; Osterman, Steven; Gäensicke, Boris T.
United States, United Kingdom
Abstract
Here we describe the observation and calibration procedure for a new G140L observing mode for the Cosmic Origins Spectrograph (COS) on board the Hubble Space Telescope (HST). This mode, CENWAV = 800, is designed to move the far-UV band fully onto the Segment A detector, allowing for more efficient observation and analysis by simplifying calibration management between the two channels, and reducing the astigmatism in this wavelength region. We also describe some of the areas of scientific interest for which this new mode will be especially suited.