User's Guide – 2.6 Auxiliary products
Four types of auxiliary images are produced for the stacked catalogue and provided in the XSA interface:
- a broad-band X-ray image in the 0.2–12.0 keV range,
- a three-colour X-ray image in the energy bands 0.2–1.0, 1.0–2.0, 2.0–12.0 keV, corresponding to the 3XMM standard energy bands 1 plus 2, 3, and 4 plus 5,
- an optical finding chart,
- and, if the source has non-zero flux during at least two observations, a long-term light curve, showing the stacked EPIC flux value and the EPIC flux during the contributing observations. Different plot symbols are used to indicate tentative short- and long-term variability. The stacked flux is plotted with a filled circle, if the variability VAR_PROB of the source fluxes to be consistent with constant flux is 1% or lower.