COS Target Acquisition Guidelines, Recommendations, and Interpretation

Details COS Target Acquisition Guidelines, Recommendations, and Interpretation COS Target Acquisition Guidelines, Recommendations, and Interpretation

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010cos..rept...14k&link_type=abstract

Instrument Science Report COS 2010-14(v1), 23 pages

Computer Science

Performance

Hubble Space Telescope, Hst, Space Telescope Science Institute, Cos, Cosmic Origins Spectrograph

Scientific paper

Based upon analysis of SMOV and Cycle 17 observations through April 2010, this ISR expands, updates, and supersedes recommendations and information provided about target acquisitions (TA) in the COS Instrument Handbook version 2. This ISR provides an overview of COS TA, presents general guidelines and recommendations for crafting COS TAs, establishes COS TA centering accuracy requirements to achieve COS photometric, velocity, and resolution objectives, and summarizes the performance of the COS on-board TA modes as compared to these centering requirements. Updated TA strategy recommendations are given where appropriate, a user-oriented table lists where to find important quantities for the analysis and interpretation of COS TAs, and a brief appendix with additional supporting information is included. An overview of COS TA strategies is provided in Section 2 and Table 1; important updates to ACQ/SEARCH requirements and SEARCH-SIZE recommendations as a function of target coordinate accuracy are given in Tables 2 and 3; COS TA performance by mode is described in Section 5; important header keywords that are useful for evaluating the quality of COS TAs are listed in Table 5 along with where to find them; Table 6 gives a summary of COS TA modes, options, and recommended values; Section 7 summarizes updated recommendations and guidelines for COS TA; and Appendix A provides additional useful COS TA information.

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