J-PLUS: Photometric Re-calibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry Method

Kai Xiao; Haibo Yuan; C. Lopez-Sanjuan; Yang Huang; Bowen Huang; Timothy C. Beers; Shuai Xu; Yuanchang Wang; Lin Yang; J. Alcaniz; Carlos Andrés Galarza; R. E. Angulo; A. J. Cenarro; D. Cristobal-Hornillos; R. A. Dupke; A. Ederoclite; C. Hernandez-Monteagudo; A. Marn-Franch; M. Moles; L. Sodre Jr.; H. Vazquez Ramio; J. Varela

arXiv · 2309.11225

J-PLUS: Photometric Re-calibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry Method

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Abstract

We employ the corrected Gaia Early Data Release 3 (EDR3) photometric data and spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR7 to assemble a sample of approximately 0.25 million FGK dwarf photometric standard stars for the 12 J-PLUS filters using the Stellar Color Regression (SCR) method. We then independently validated the J-PLUS DR3 photometry, and uncovered significant systematic errors: up to 15 mmag in the results of Stellar Locus (SL) method, and up to 10 mmag mainly caused by magnitude-, color-, and extinction-dependent errors of the Gaia XP spectra with the Gaia BP/RP (XP) Synthetic Photometry (XPSP) method. We have also further developed the XPSP method using the corrected Gaia XP spectra by Huang et al. (2023) and applied it to the J-PLUS DR3 photometry. This resulted in an agreement of 1-5 mmag with the SCR method, and a two-fold improvement in the J-PLUS zero-point precision. Finally, the zero-point calibration for around 91% of the tiles within the LAMOST observation footprint is determined through the SCR method, with the remaining approximately 9% of tiles outside this footprint relying on the improved XPSP method. The re-calibrated J-PLUS DR3 photometric data establishes a solid data foundation for conducting research that depends on high-precision photometric calibration.

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Kai Xiao, Haibo Yuan, C. Lopez-Sanjuan, Yang Huang, Bowen Huang, Timothy C. Beers, Shuai Xu, Yuanchang Wang, Lin Yang, J. Alcaniz, Carlos Andrés Galarza, R. E. Angulo, A. J. Cenarro, D. Cristobal-Hornillos, R. A. Dupke, A. Ederoclite, C. Hernandez-Monteagudo, A. Marn-Franch, M. Moles, L. Sodre Jr., H. Vazquez Ramio, J. Varela. 2023-10-22. J-PLUS: Photometric Re-calibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry Method. https://arxiv.org/abs/2309.11225

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