This is a trending plot monitoring the read-out-noise (RON) measured
from the raw(3)-raw(2) difference frame. It's been introduced since
November 2007. The RON values are displayed for both, the imaging and
spectroscopic detectors. The data points for the spectroscopic
detector include those taken in MR (values around 150) and in HRS
(values around 180).
Click on any of the plots to see a close-up version.
If applicable, the latest values from Paranal ops logs are plotted as blue dots. More information about those values, including a download option, is available in the OPS column.
The latest date is indicated on top of the plot, data points belonging to that date are specially marked.
statistical averages are indicated by a solid line, and thresholds by broken lines
outliers are marked by a red asterisk. They are defined as data points outside the
"aliens" (= data points outside the plot Y limits) are marked by a red arrow (↑ or ↓)
you can download the data for each parameter set if the 'Data downloads' link shows up