Pixel centroid characterization with laser speckle and application to the Nancy Grace Roman Space Telescope detector arrays
arXiv:2208.13665 · doi:10.1088/1538-3873/ac99fe
Abstract
The Nancy Grace Roman Space Telescope will use its wide-field instrument to carry out a suite of sky surveys in the near infrared. Several of the science objectives of these surveys, such as the measurement of the growth of cosmic structure using weak gravitational lensing, require exquisite control of instrument-related distortions of the images of astronomical objects. Roman will fly 4kx4k Teledyne H4RG-10 infrared detector arrays. This paper investigates whether the pixel centroids are located on a regular grid by projecting laser speckle patterns through a double slit aperture onto a non-flight detector array. We develop a method to reconstruct the pixel centroid offsets from the stochastic speckle pattern. Due to the orientation of the test setup, only x-offsets are measured here. We test the method both on simulations, and by injecting artificial offsets into the real images. We use cross-correlations of the reconstructions from different speckle realizations to determine how much of the variance in the pixel offset maps is signal (fixed to the detector) and how much is noise. After performing this reconstruction on 64x64 pixel patches, and fitting out the best-fit linear mapping from pixel index to position, we find that there are residual centroid offsets in the x (column) direction from a regular grid of 0.0107 pixels RMS (excluding shifts of an entire row relative to another, which our speckle patterns cannot constrain). This decreases to 0.0097 pix RMS if we consider residuals from a quadratic rather than linear mapping. These RMS offsets include both the physical pixel offsets, as well as any apparent offsets due to cross-talk and remaining systematic errors in the reconstruction. We comment on the advantages and disadvantages of speckle scene measurements as a tool for characterizing the pixel-level behavior in astronomical detectors.
arXiv comment24 pages, 9 figures, to be submitted to PASP
References in corpus (49)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Astropy: A Community Python Package for Astronomy
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- Observational Probes of Cosmic Acceleration
- X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
- Planck 2018 results. VIII. Gravitational lensing
- Mass Reconstruction with CMB Polarization
- Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
- Detection of Weak Gravitational Lensing by Large-scale Structure
- Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing
- CMB Lensing Reconstruction on the Full Sky
- Weak Lensing of the CMB: A Harmonic Approach
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
- Weak lensing for precision cosmology
- Detection of Gravitational Lensing in the Cosmic Microwave Background
- Reconstruction of lensing from the cosmic microwave background polarization
- Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data
- Correlation of CMB with large-scale structure: II. Weak lensing
- Simulations of the WFIRST Supernova Survey and Forecasts of Cosmological Constraints
- Mapping the Dark Matter through the CMB Damping Tail
- An Efficient Technique to Determine the Power Spectrum from Cosmic Microwave Background Sky Maps
- An isolated mass gap black hole or neutron star detected with astrometric microlensing
- KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs
- Cosmic Shear of the Microwave Background: The Curl Diagnostic
- Properties and characteristics of the WFIRST H4RG-10 detectors
- Lensing Reconstruction using redshifted 21cm Fluctuations
- Sub-Pixel Response Measurement of Near-Infrared Sensors
- Producing Mega-pixel CMB Maps from Differential Radiometer Data
- Full-sky lensing reconstruction of gradient and curl modes from CMB maps
- A Search for Stellar-Mass Black Holes via Astrometric Microlensing
- Microlens Masses From Astrometry and Parallax in Space-Based Surveys: From Planets to Black Holes
- Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data
- Ground-based astrometry with wide field imagers. V. Application to near-infrared detectors: HAWK-I@VLT/ESO
- Optimal Linear Image Combination
- Internal delensing of Cosmic Microwave Background polarization B-modes with the POLARBEAR experiment
- Photometric Redshift Calibration Requirements for WFIRST Weak Lensing Cosmology: Predictions from CANDELS
- A Synthetic Roman Space Telescope High-Latitude Imaging Survey: Simulation Suite and the Impact of Wavefront Errors on Weak Gravitational Lensing
- Validation of Up-the-Ramp Sampling with Cosmic Ray Rejection on IR Detectors
- Brighter-fatter effect in near-infrared detectors -- I. Theory of flat auto-correlations
- A detector interferometric calibration experiment for high precision astrometry
- Precision of diffuse 21-cm lensing
- Brighter-fatter effect in near-infrared detectors -- II. Auto-correlation analysis of H4RG-10 flats
- Brighter-fatter effect in near-infrared detectors -- III. Fourier-domain treatment of flat field correlations and application to WFIRST
- In the crosshair: astrometric exoplanet detection with WFIRST's diffraction spikes
- Diagnosing space telescope misalignment and jitter using stellar images
- Quantum yield and charge diffusion in the Nancy Grace Roman Space Telescope infrared detectors
- Direct geometrical measurement of the Hubble constant from galaxy parallax: predictions for the Vera C. Rubin Observatory and Nancy Grace Roman Space Telescope
- Euclid Near Infrared Spectrometer and Photometer instrument flight model presentation, performance and ground calibration results summary