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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2506.03256 |
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| author | Franco, Maximilien Casey, Caitlin M. Koekemoer, Anton M. Liu, Daizhong Bagley, Micaela B. McCracken, Henry Joy Kartaltepe, Jeyhan S. Akins, Hollis B. Ilbert, Olivier Shuntov, Marko Harish, Santosh Robertson, Brant E. Arango-Toro, Rafael C. Battisti, Andrew J. Chartab, Nima Drakos, Nicole E. Faisst, Andreas L. Flayhart, Carter Gozaliasl, Ghassem Hirschmann, Michaela Massey, Richard Rhodes, Jason Sattari, Zahra Scognamiglio, Diana Weaver, John R. Yang, Lilan Zavala, Jorge A. Berman, Edward M. Gentile, Fabrizio Gillman, Steven Long, Arianna S. Magdis, Georgios McCleary, Jacqueline E. McKinney, Jed Mobasher, Bahram Paquereau, Louise Rest, Armin Sanders, David B. Toft, Sune Yu, Si-Yue |
| author_facet | Franco, Maximilien Casey, Caitlin M. Koekemoer, Anton M. Liu, Daizhong Bagley, Micaela B. McCracken, Henry Joy Kartaltepe, Jeyhan S. Akins, Hollis B. Ilbert, Olivier Shuntov, Marko Harish, Santosh Robertson, Brant E. Arango-Toro, Rafael C. Battisti, Andrew J. Chartab, Nima Drakos, Nicole E. Faisst, Andreas L. Flayhart, Carter Gozaliasl, Ghassem Hirschmann, Michaela Massey, Richard Rhodes, Jason Sattari, Zahra Scognamiglio, Diana Weaver, John R. Yang, Lilan Zavala, Jorge A. Berman, Edward M. Gentile, Fabrizio Gillman, Steven Long, Arianna S. Magdis, Georgios McCleary, Jacqueline E. McKinney, Jed Mobasher, Bahram Paquereau, Louise Rest, Armin Sanders, David B. Toft, Sune Yu, Si-Yue |
| contents | We present the data reduction methodology used for the COSMOS-Web survey JWST NIRCam data. Covering 0.54 deg^2 with four broadband filters (F115W, F150W, F277W, F444W) and a total exposure time of approximately 270 hours, COSMOS-Web represents the largest contiguous field surveyed during JWST Cycle 1, posing unique data reduction challenges due to its extensive scale. By combining the official JWST Calibration Pipeline with custom improvements for noise removal, background subtraction, and astrometric alignment, we achieve high fidelity science-ready mosaics. We detail the systematic approach employed in the three stages of the JWST Calibration Pipeline. The data, collected in three epochs from January 2023 to January 2024, encompass 152 visits and have been processed into 20 mosaic tiles to optimize computational efficiency and data processing. The final data products achieve 5 sigma depths of 26.7-28.3 AB mag in 0.15" apertures. The processed and calibrated datasets are made available to the public. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03256 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | COSMOS-Web: Comprehensive Data Reduction for Wide-Area JWST NIRCam Imaging Franco, Maximilien Casey, Caitlin M. Koekemoer, Anton M. Liu, Daizhong Bagley, Micaela B. McCracken, Henry Joy Kartaltepe, Jeyhan S. Akins, Hollis B. Ilbert, Olivier Shuntov, Marko Harish, Santosh Robertson, Brant E. Arango-Toro, Rafael C. Battisti, Andrew J. Chartab, Nima Drakos, Nicole E. Faisst, Andreas L. Flayhart, Carter Gozaliasl, Ghassem Hirschmann, Michaela Massey, Richard Rhodes, Jason Sattari, Zahra Scognamiglio, Diana Weaver, John R. Yang, Lilan Zavala, Jorge A. Berman, Edward M. Gentile, Fabrizio Gillman, Steven Long, Arianna S. Magdis, Georgios McCleary, Jacqueline E. McKinney, Jed Mobasher, Bahram Paquereau, Louise Rest, Armin Sanders, David B. Toft, Sune Yu, Si-Yue Instrumentation and Methods for Astrophysics Astrophysics of Galaxies We present the data reduction methodology used for the COSMOS-Web survey JWST NIRCam data. Covering 0.54 deg^2 with four broadband filters (F115W, F150W, F277W, F444W) and a total exposure time of approximately 270 hours, COSMOS-Web represents the largest contiguous field surveyed during JWST Cycle 1, posing unique data reduction challenges due to its extensive scale. By combining the official JWST Calibration Pipeline with custom improvements for noise removal, background subtraction, and astrometric alignment, we achieve high fidelity science-ready mosaics. We detail the systematic approach employed in the three stages of the JWST Calibration Pipeline. The data, collected in three epochs from January 2023 to January 2024, encompass 152 visits and have been processed into 20 mosaic tiles to optimize computational efficiency and data processing. The final data products achieve 5 sigma depths of 26.7-28.3 AB mag in 0.15" apertures. The processed and calibrated datasets are made available to the public. |
| title | COSMOS-Web: Comprehensive Data Reduction for Wide-Area JWST NIRCam Imaging |
| topic | Instrumentation and Methods for Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2506.03256 |