ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC

Details ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005acs..rept....3k&link_type=abstract

Instrument Science Report ACS 2005-10, 53 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Polarimetry Calibrations, Acs/Hrc Polarizer Filters

Scientific paper

The goal of polarimetry calibrations of ACS/HRC polarizer filters is to obtain the photometric accuracy from polarized images at the level of 1%. So far such calibration has been done only for the standard wide-band filters, F250W, F330W,F435W, F475W, F606W, F814W, F775W. Thus, the observations of the globular cluster of 47 Tuc exposed through the representative filters F220W; F250W; F330W; F435W crossed with three blue-optimized UV polarizers, POL0UV; POL60UV; POL120UV , and F475W; F606W; F658W; F775W crossed with three visible-light-optimized polarizers POL0V; POL60V; POL120V have been used to examine how the sensitivity varies cross the detector. The effective PSF library by Anderson and King has been used to obtain the working sets of X; Y coordinates and Flux for stars in assorted polarized and non-polarized image. Applying the gaussian smoothing technique to the ratio of uxes from polarized and non-polarized images, so-called low-frequency at-fields or L ats were derived to correct the low-frequency variations across the ACS/HRC. After applying the additional corrections to the polarized images the accuracy of photometry has reached the required precision of 1%.

Affiliated with

Also associated with

No associations

Rating

ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ACS/HRC polarimetry calibration.IV. Low-Frequency Flat-Field of polarized filters for ACS/HRC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1343580