New Gapless COS G140L Mode Proposed for Background-Limited Far-UV   Observations
  Here we describe the observation and calibration procedure for a new G140L observing mode for the Cosmic Origins Spectrograph (COS) aboard 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 e cient ob- servation and analysis by simplifying calibration management between the two channels, and reducing the astigmatism in this wavelength region. We also de- scribe some of the areas of scientific interest for which this new mode will be especially suited. 
Keith Redwine, Stephan R. McCandliss, Brian Fleming, Kevin France, Wei   Zheng, Steven Osterman, J. Christopher Howk, Scott ...
astro-ph.IM