WFC3 Imaging Of z=6 QSO Hosts: A Method For PSF Characterization And Subtraction

Details WFC3 Imaging Of z=6 QSO Hosts: A Method For PSF Characterization And Subtraction WFC3 Imaging Of z=6 QSO Hosts: A Method For PSF Characterization And Subtraction

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714240m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #142.40; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an observation and analysis plan for using the Wide Field Camera 3 IR Channel on the Hubble Space Telescope to carefully characterize and subtract the central point source from a redshift 6 QSO, in an attempt to image and conduct photometry on the underlying host galaxy.
We discuss parameters affecting measurement of the instrument point spread function (PSF), including thermally-induced secondary mirror de-focus ("spacecraft breathing"), object spectral slope, and IR channel image persistence. We describe in detail our plan to address these effects or measure them on-orbit, and the criteria used to select the star with which we will make these PSF measurements.
We also present our data analysis strategy, including models of breathing-induced PSF variation, and point source subtraction in simulated images. Depending upon the HST cycle 18 observation schedule, we will also discuss preliminary results if our first set of data is available. Support for HST GO program #12332 is provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

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