- M&TA MONTHLY REPORT -
March 2009
OUTLINE
- Configuration
- ACIS
- Dose
- CTI
- Focal Plane Temperature
- Bad Pixels
- Background
- Rejected Events
- HRC - Dose
- Gratings - Focus
- PCAD
- ACA Trending
- Gyro bias drift
- Radiation Zone Timing
- Trending
- Critical Trends
- Quarterly Trends
- Spacecraft Motions
Configuration/Radiation Overview for March 2009
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ACIS
- ACIS DOSE registered-photon-map
The steps we took to compute the dose map are;
- Level 1 Event files for a specified month are obtained from archive.
- Image data including I2, I3, S2, S3 CCDs are extracted from all event files.
- All the extracted image data were merged to create a month long exposure map for the month.
- The exposure map is opened with ds9, and check a distribution of count rates against energy.
From this, estimate the upper threshold value. Any events beyond this upper threshold are
assumed erroneous events such as bad pixels.
- Using this upper threshold, the data is filtered, and create a cleaned exposure map for the month.
- The exposure map from each month from the Sep 1999 is added up to create a cumulative exposure
map for each month.
- Using fimgstatistic, we compute count rate statistics for each CCDs.
- For observations with high data drop rates (e.g., Crab nebula, Cas A), we corrected the
observations by adding events.
Note: Counts and RMS's of Cumulative maps are lower than the previous months. This is because we excluded
extreme outliers.
Please check more detail plots at Telemetered Photon Dose Trend page.
- MAR registered-photon-map in fits
Statistics:
# IMAGE NPIX MEAN RMS MIN MAX
ACIS_mar09 6004901 8.021 12.00 0.0 707.0
I2 node 0 262654 8.323936 3.479444 0.0 54.0
I2 node 1 262654 8.864878 3.933064 0.0 307.0
I2 node 2 262654 8.720539 3.553127 0.0 47.0
I2 node 3 262654 8.552234 3.740525 0.0 50.0
I3 node 0 262654 8.256441 3.470495 0.0 46.0
I3 node 1 262654 8.788334 9.062122 0.0 230.0
I3 node 2 262654 8.072502 3.335395 0.0 62.0
I3 node 3 262654 8.059811 3.395845 0.0 134.0
I2 node 0 262654 11.530178 4.339202 0.0 364.0
I2 node 1 262654 11.892737 4.843755 0.0 88.0
I2 node 2 262654 12.352114 4.592746 0.0 118.0
I2 node 3 262654 11.840391 4.344664 0.0 707.0
I3 node 0 262654 12.907441 5.230000 0.0 105.0
I3 node 1 262654 14.012523 5.226427 0.0 87.0
I3 node 2 262654 13.268903 3.997264 0.0 49.0
I3 node 3 262654 12.139558 3.755607 0.0 95.0
- Jul 1999 - Mar 2009 registered-photon-map in fits
Statistics:
IMAGE NPIX MEAN RMS MIN MAX
ACIS_total 6004901 1236.16 1688.62 0.0 75465.0
I2 node 0 262654 960.632637 173.625668 0.0 4374.0
I2 node 1 262654 1016.441302 237.189889 0.0 16687.0
I2 node 2 262654 1030.559833 199.251743 0.0 8420.0
I2 node 3 262654 1031.362072 252.774415 0.0 27277.0
I3 node 0 262654 1084.257103 261.264537 0.0 5663.0
I3 node 1 262654 1126.302334 818.145877 0.0 21683.0
I3 node 2 262654 1002.195832 171.862208 0.0 4359.0
I3 node 3 262654 990.302662 184.564694 0.0 18301.0
I2 node 0 262654 1483.447955 195.328349 725.0 19823.0
I2 node 1 262654 1572.880556 325.062524 758.0 8232.0
I2 node 2 262654 1752.934356 330.563132 980.0 11674.0
I2 node 3 262654 1692.218272 245.473620 969.0 23008.0
I3 node 0 262654 2592.314982 1301.013306 1058.0 11011.0
I3 node 1 262654 3802.438348 1793.261186 0.0 11900.0
I3 node 2 262654 2802.806307 818.921191 946.0 6352.0
I3 node 3 262654 2118.748226 347.378122 1113.0 8300.0
- MAR 2009 dose PNG image
- MAR I3 dose PNG image
- MAR S3 dose PNG image
- TOTAL JUL 1999 - MAR 2009 dose PNG image
- TOTAL I3 dose PNG image
- TOTAL S3 dose PNG image
Integrated Exposure Maps of Last 12 Months
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| Dec 2008 |
Sep 2008 |
Jun 2008 |
Mar 2008 |
The Mean Detrended CTI
We report CTIs with a refined data definition. CTIs were computed for the temperature
dependency corrected data.
Please see
CTI page
for detailed explanation.
CTI's are computed for Mn K alpha, and defined as slope/intercept x10^4 of row # vs ADU.
Data file here
Focal Plane Temperature
The Mean (max) FPT: -110.27 C std dev: 5.06
mean width: 0.48 days std dev: 0.40
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.
The following is a plot of focal plane temperature and sun angle, earth angle, and altitude.
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 or CTI observations are removed. For daily updates see:
Ephin/Acis Info
Science instrument background rates
This page shows scientific instrument background data based on Acis
observations. A source region file is generated using get_srcregions
and then the input event file is filtered using the regions in that file
to remove the sources.
| Name | Low (keV) | High(KeV) | Description |
|---|
| SSoft | 0.00 | 0.50 | Super soft photons |
|---|
| Soft | 0.50 | 1.00 | Soft photons |
|---|
| Med | 1.00 | 3.00 | Moderate energy photons |
|---|
| Hard | 3.00 | 5.00 | Hard Photons |
|---|
| Harder | 5.00 | 10.00 | Very Hard photons |
|---|
| Hardest | 10.00 | | Beyond 10 keV |
|---|
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 janline of the CTI source is clearly evidenced in the steady
janline of EVTSENT.
CCD3 CTI Observations
CCD7 Science Observations
CCD7 CTI Observations
CCD7 Science Observations
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HRC
Gratings
- Focus
We plot the width of the zero order streak of ACIS/HETG observations and
the width of the zero order image for HRC/LETG observations of point sources.
No significant defocusing trend is seen at this time. See
Gratings Focus
pages.
Spacecraft Motions
Reaction Wheel Rotations
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Previous Months
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