From the 1 of 8 linked papers with an AI index.
8 papers
Updates to WFC3/UVIS Encircled Energy Values in Select Filters
Anne O'Connor, Jennifer Mack, Varun Bajaj
We present updated encircled energy (EE) curves for a subset of UVIS filters. These are derived from a reanalysis of the drizzled Point Spread Function (PSF) data underlying the cu…
The James Webb Space Telescope Absolute Flux Calibration. VI. Near-Infrared Camera Imaging and Coronagraphy
Martha L. Boyer, Benjamin Sunnquist, Bryan Hilbert +4
We present an updated flux calibration for all imaging modes of the Near-Infrared Camera on JWST that converts instrumental units to physical surface brightness units of MJy sr^-1.…
Updates to the WFC3/IR Photometric Stability Stellar Cluster Study
Ky Huynh, Varun Bajaj
The authors extend measurements of the Hubble WFC3/IR channel's sensitivity loss to 2026 using photometry of uncrowded regions in the star clusters 47 Tucanae and Messier 4, findin…
New Time-Dependent WFC3/IR Inverse Sensitivities
Annalisa Calamida, Mariarosa Marinelli, Varun Bajaj +2
We present new time-dependent inverse sensitivities for the WFC3/IR channel. These were calculated using the sensitivity change slopes measured by \citet{2024wfc..rept....6M} and p…
WFC3/UVIS Geometric Distortion -- Time Evolution of Linear Terms w.r.t Gaia
Anne O'Connor, Varun Bajaj, Jennifer Mack +1
We align more than 7,400 WFC3/UVIS exposures to the Gaia DR3 catalog to examine the time evolution of the linear terms (shift, rotation, scale and skew) of the geometric distortion…
Pixel-Based Non-Linearity Correction for the WFC3 IR Detector
Sachindev S. Shenoy, Ky Huynh, Varun Bajaj +1
The current non-linearity correction for the Wide Field Camera 3 Infrared (WFC3/IR) channel is based on ground-based data acquired during WFC3's Thermal Vacuum 3 (TV3) testing camp…