CTI Slope (after DOM 200)
CTI slopes were computed for data point after DOM 200 and inside of 1 sigma deviation.
Using only data point in 1 sigma range, we drop high temperature observations, squeegy
observations, and other outliers. A independent variable is date, and a dependent
variable is CTI.
Note: Unit is cti/day from this month report.
Front Side Illuminated S Array
Node 0 Node 1 Node 2 Node 3
CCD4 9.570e-9 1.221e-8 1.315-e8 1.114e-8
CCD6 1.037e-8 1.156e-8 1.180e-8 1.076e-8
CCD8 8.870e-9 9.731e-9 8.490e-9 8.238e-9
CCD9 9.656e-9 1.158e-8 1.121e-8 8.164e-9
AVG 9.483e-9
Front Side Illuminated I Array
Node 0 Node 1 Node 2 Node 3
CCD0 8.098e-9 1.040e-8 1.041e-8 8.724e-9
CCD1 8.606e-9 1.024e-8 9.849e-9 7.861e-9
CCD2 9.046e-9 1.080e-8 1.048e-8 8.321e-9
CCD3 8.652e-9 1.041e-8 1.029e-8 9.011e-9
AVG 8.700e-9
Back Side Illuminated S Array (not detrended)
Node 0 Node 1 Node 2 Node 3
CCD5 3.674e-9 3.850e-9 3.948e-9 2.483e-9
AVG: 3.303e-9
CCD7 2.270e-9 3.114e-9 3.301e-9 2.139e-9
AVG 2.752e-9
Focal Plane Temperature
The Mean (max) FPT: -115.45 std dev: 1.69
mean width: 0.55 std dev: 0.35
We are using 10 period moving averages to show
trends of peak temperatures and peak widths.
Note, the gaps in the width plot are due to missing/corrupted data.
Bad Pixels
The plots below were generated with a new warm pixel finding script. Please see
Acis Bad Pixel Page
for details.
Front Side CCDs
Back Side CCD (CCD5)
Acis Count Rate Plot
This monitors the ACIS count Rate vs. EPHIN count Rate.
No sources are removed. For daily updates see:
Ephin/Acis Info
ACIS Rejected Events
The links below are plots of stat1 quantities, showing on-board rejected
events. The average EVTSENT,
DROP_AMP, DROP_POS, DROP_GRD, THR_PIX, and maximum BERR_SUM obtained from
L1 acis*stat1.fits files are plotted
for each observation. CTI observations are plotted separately from regular
science observations.
Column definitions:
- EVTSENT - number of events sent in data record
- DROP_AMP - number of discarded events due to corrected amplitude
- DROP_POS - number of discarded events due to CCD position
- DROP_GRD - number of discarded events due to grade code
- THR_PIX - number of pixels above respective threshold level
- BERR_SUM - number of pixel bias errors so far in science run
Note the half-life decay of the CTI source is clearly evidenced in the steady
decline of EVTSENT.
CCD7 CTI Observations
CCD7 Science Observations
CCD8 Science Observations
ACIS Bias Trends
The bias plus overclock level was calculated as follows:
- Get acisf*bias0.fits is obtained from a database or /dsops/ap/sdp/cache/*/acis/
- Data with timed mode exposure is selected.
- Fits files were divided into 4 quads, then an average of bias level for each quad is computed.
No corrections for dead spots, columns etc were included.
CCDS 0,
2 and
8 are the most
extreme.
An example of Overclock values as reported in FITS file header:
An example of mean bias minus overclock value:
TOP
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