Fig. 2
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Map of the Galactic plane fields that were regularly observed by EROS-2. The colored contours correspond to the EROS-2 fields and are color-coded for the five regions. The background image shows the density of all Gaia-dr3 sources (Gaia Collaboration 2023), with a square-root scale, as extracted from the CDS using hips2fits. Some artifacts in the form of stripes are visible in the Galactic bulge area. They reflect the effect of the Gaia scanning strategy on its source detection threshold.
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