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Fig. 2

image

Typical stamps taken from the image series related to (12974) Halitherses, which was the object with the fastest apparent speed (exceeding 2 pixels per long-cadence frame). The upper row of image stamps shows the original frames between the cadences #2633 and #2637 while the lower row shows the registered and differential stamps corresponding to their respective upper counterparts. The elongated aperture (bounded by the thick yellow curve) and the elongated annuli (bounded by the red curves) are used for the photometry and for the estimation of the background level, respectively. These stamps show a region of 20 × 40 pixels, i.e. an area of 1.33′ × 2.66′ on the sky.

This figure is made of several images, please see below:

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