We present the application of the image coaddition algorithm, Up-sampling and PSF Deconvolution Coaddition (UPDC), for stacking multiple exposure images captured by the James Webb Space Telescope (JWST) Near-Infrared Camera (NIRCam). By addressing the point spread function (PSF) effect, UPDC provides visually enhanced and sharper images. Furthermore, the anti-aliasing and super-resolution capabilities of UPDC make it easier to deblend sources overlapped on images, yielding a higher accuracy of aperture photometry. We apply this algorithm to the SMACS J0723 imaging data. Comparative analysis with the Drizzle algorithm demonstrates significant improvements in detecting faint sources, achieving accurate photometry, and effectively deblending (super-resolution) closely packed sources. {As a result, we have newly detected a pair of close binary stars that were previously unresolvable in the original exposures or the Drizzled image.} These improvements significantly benefit various scientific projects conducted by JWST. The resulting dataset, named "UPdec-Webb", can be accessible through the official website of the Chinese Virtual Observatory (ChinaVO).
@article{arxiv.2411.13891,
title = {UPdec-Webb: A Dataset for Coaddition of JWST NIRCam Images},
author = {Lei Wang and Huanyuan Shan and Lin Nie and Cheng Cheng and Fang-Ting Yuan and Qifan Cui and Guoliang Li and Yushan Xie and Dezi Liu and Yao Liu and Min Fang and Nan Li and Peng Jia and Ran Li and Fengshan Liu and Yiping Shu and Chang Jiang and Cheng-Liang Wei and Han Qu and Wen-Wen Zheng and Li-Yan Zhu and Xi Kang},
journal= {arXiv preprint arXiv:2411.13891},
year = {2024}
}
Comments
21 pages, 18 figures, accepted for publication in ApJS