Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-11
Astrophys.J.600:L159-L162,2004
Astronomy and Astrophysics
Astrophysics
12 pages, 3 figures. Accepted for ApJL
Scientific paper
10.1086/379697
We present three-epoch multiband ($V_{606}$, $i_{775}$, $z_{850}$) measurements of galaxy shapes using the ``polar shapelet'' or Laguerre-expansions method with the Hubble Space Telescope ($HST$) Advanced Camera for Surveys (ACS) data, obtained as part of the {\it Great Observatories Origin Deep Survey} (GOODS). We take advantage of the unique features of the GOODS/ACS Fields to test the reliability of this relatively new method of galaxy shape measurement for weak lensing analysis and to quantify the impact of the ACS Point Spread Function (PSF) on $HST$/ACS data. We estimate the bias introduced by the sharp PSF of the ACS on shape measurement. We show that the bias in the tangential shear due to galaxy-galaxy lensing can be safely neglected provided only well-resolved galaxies are used, while it would be comparable to the signal level (1--3%) for cosmic shear measurements. These results should of be general utility in planning and analyzing weak lensing measurements with $HST$/ACS data.
Casertano Stefano
Ferguson Henry C.
Park Yousin
No associations
LandOfFree
Optimal Galaxy Shape Measurements for Weak Lensing Applications Using the Hubble Space Telescope Advanced Camera for Surveys 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 Optimal Galaxy Shape Measurements for Weak Lensing Applications Using the Hubble Space Telescope Advanced Camera for Surveys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal Galaxy Shape Measurements for Weak Lensing Applications Using the Hubble Space Telescope Advanced Camera for Surveys will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-229889