Astrometry and Photometry with HST WFC3. II. Improved Geometric-Distortion Corrections for 10 Filters of the UVIS Channel

By Andrea Bellini, Jay Anderson, L. Bedin, Univ.PD, STScI. 2011

162 citations recorded by the source corpus.

We present an improved geometric-distortion solution for the Hubble Space Telescope UVIS channel of Wide Field Camera 3 for 10 broadband filters. The solution is made up of three parts: (1) a third-order polynomial to deal with the general optical distortion, (2) a table of residuals that accounts for both chip-related anomalies and fine-structure introduced by the filter, and (3) a linear transformation to put the two chips into a convenient master frame. The final correction is better than 0.008 pixel (∼0.3 mas) in each coordinate. We provide the solution in two different forms: a FORTRAN subroutine and a set of FITS files, one for each filter/chip/coordinate.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering, Instrumentation

View Paper: https://www.semanticscholar.org/paper/f1200cdf81e49661bff7569d96176f86460daa77

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Jay Anderson
2. G. Piotto
3. A. Milone
4. F. D’Antona
5. A. Bragaglia
6. R. Gratton
7. E. Carretta
8. L. Bedin

In Electrical and Electronic Engineering

1. A. Riess
2. Jay Anderson
3. A. Filippenko
4. R. Gratton
5. A. Renzini
6. F. D’Antona
7. S. Vagnozzi

In Instrumentation

1. F. D’Antona
2. R. Gratton
3. E. Carretta
4. A. Bragaglia
5. G. Piotto
6. Jay Anderson
7. A. Milone
8. L. Bedin

Citations in the corpus

• MULTIPLE STELLAR POPULATIONS IN 47 Tucanae (2011, methodology): “Star positions and fluxes were corrected for pixel area and geometric distortion by using the solution given by Bellini & Bedin (2010) and Bellini et al. (2011), and were calibrated as in Bedin et al. (2005).”
• New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant (2018, methodology): “Relative detector coordinates are transformed to relative sky coordinates using a geometric distortion solution following Bellini et al. (2011) specific to the scan filter.”
• A WFC3/HST VIEW OF THE THREE STELLAR POPULATIONS IN THE GLOBULAR CLUSTER NGC 6752 (2013, methodology): “Star positions were corrected for geometric distortion using the solutions given by Bellini & Bedin (2009) and Bellini et al. (2011) for WFC3/UVIS, Anderson & King (2006) for ACS/WFC, and Anderson et al. (in preparation) for WFC3/NIR.”
• THIRD-EPOCH MAGELLANIC CLOUD PROPER MOTIONS. I. HUBBLE SPACE TELESCOPE/WFC3 DATA AND ORBIT IMPLICATIONS (2013, methodology): “The method is akin to that used in Anderson & King (2004) and is shown in Bellini et al. (2011) to be stable over time to better than 0.008 pixels (RMS) in each coordinate.”