{
  "id": "2101.07409",
  "version": "v1",
  "published": "2021-01-19T01:51:49.000Z",
  "updated": "2021-01-19T01:51:49.000Z",
  "title": "Correction to the photometric colors of Gaia Early Data Release 3",
  "authors": [
    "Zexi Niu",
    "Haibo Yuan",
    "Jifeng Liu"
  ],
  "comment": "8 pages, 4 figures, 1 table",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA",
    "astro-ph.IM"
  ],
  "abstract": "In this work, we use the spectroscopy-based stellar color regression (SCR) method with ~ 0.7 million common stars between LAMOST DR7 and Gaia EDR3 to acquire color corrections in G - GRP and GBP - GRP. A sub-mmag precision is achieved. Our results demonstrate that improvements in the calibration process of the EDR3 have removed the color term in GBP - GRP and eliminated the discontinuity caused by the changes of instrument configurations to a great extent. However, modest systematic trends with G magnitude are still detected. The corresponding color correction terms as a function of G are provided for 9.5 < G < 17.5 and compared with other determinations. Possible applications as well as limitations of our results are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-01-19T01:51:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gaia early data",
      "photometric colors",
      "spectroscopy-based stellar color regression",
      "corresponding color correction terms",
      "modest systematic trends"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}