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.
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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.
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Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_nov09 6004901 12.07 20.66 0.0 9074 I2 node 0 262654 12.862488 5.959898 0.0 85.0 I2 node 1 262654 12.712817 15.457648 0.0 7410.0 I2 node 2 262654 12.261024 4.650003 0.0 85.0 I2 node 3 262654 12.121113 4.978214 0.0 472.0 I3 node 0 262654 13.465173 5.779261 0.0 56.0 I3 node 1 262654 13.140781 11.653978 0.0 268.0 I3 node 2 262654 11.615707 4.433487 0.0 81.0 I3 node 3 262654 12.004364 26.312263 0.0 9074.0 S2 node 0 262654 11.403451 20.758624 0.0 6203.0 S2 node 1 262654 12.029587 4.727526 0.0 84.0 S2 node 2 262654 13.181319 5.009930 0.0 116.0 S2 node 3 262654 12.836345 5.815853 0.0 756.0 S3 node 0 262654 17.311543 13.180438 0.0 278.0 S3 node 1 262654 39.102046 31.576410 0.0 261.0 S3 node 2 262654 37.348767 34.654438 1.0 239.0 S3 node 3 262654 14.073257 4.233212 1.0 56.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1332.01 1803.85 0.0 81173.0 I2 node 0 262654 1053.664768 194.190163 0.0 4953.0 I2 node 1 262654 1116.361855 265.616987 0.0 19474.0 I2 node 2 262654 1153.730377 248.182949 0.0 8610.0 I2 node 3 262654 1152.154212 294.141069 0.0 27440.0 I3 node 0 262654 1217.417725 301.355870 0.0 5961.0 I3 node 1 262654 1277.459671 926.996907 0.0 24153.0 I3 node 2 262654 1101.199781 194.206128 0.0 4933.0 I3 node 3 262654 1086.725220 207.041747 0.0 20012.0 S2 node 0 262654 1595.113526 213.853965 793.0 19914.0 S2 node 1 262654 1693.479816 352.055746 824.0 9011.0 S2 node 2 262654 1878.044558 346.056695 1067.0 12796.0 S2 node 3 262654 1812.627514 250.696112 1044.0 25958.0 S3 node 0 262654 2737.050425 1326.903048 1128.0 11206.0 S3 node 1 262654 3980.070187 1821.282541 0.0 12054.0 S3 node 2 262654 2967.457954 848.142853 1036.0 6869.0 S3 node 3 262654 2244.870604 356.013049 1190.0 8615.0
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| Aug 2009 | May 2009 | Feb 2009 | Nov 2008 |
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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
November 2009 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -111.76 | +/- 4.02 C |
| Mean Width: | |
| 0.22 | +/- 0.09 days |
Averaged Focal Plane Temperature
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.
Focal Plane Temperature and Sun Angle, Earth Engle, 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)
Science Instrument Background Rates
| 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 |
HRC
DOSE of Central 4K Pore-Pairs
Please refer to Maximum Dose Trends for more details.
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_11_2009.fits 16777216 0.015 0.038 0.0 2.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_11_2009.fits 16777216 2.831 3.694 0.0 290.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_11_2009.fits 16777216 0.005 0.070 0.0 3.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_11_2009.fits 16777216 12.491 20.630 0.0 1578.0
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Max dose trend plots corrected for events that "pile-up"
in the center of the taps due to bad position information.
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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. (NOTE: the figures are not updated from Mar 2009 due to a system problem.)
PCAD
ACA Trending
Gyro Bias Drift
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Radiation History
Radiation Zone Timing
Plotted below are radiation zone timing plots based on the following definitions of radiation zone:
- RADZONE - Ephin levels (in any of the E1300,P4GM,P41GM channels) are more than 1/3 of RADMON safing thresholds.
- RADMON - Radmon is disabled for radiation zone (as commanded based on OFLS model, for comparison with actual radiation levels).
- PERIGEE - Time of closest earth approach (for comparison)
Radiation Count Rates of Oct 2009
Trending
Quarterly Trends
| Ephin Temperature/Voltage | ||||||
|---|---|---|---|---|---|---|
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 5EIOT | 340.47 | 16.37 | -2.793e+01 | 2.872e+02 | K | EIO TEMP |
| 5EPHINT | 315.53 | 3.71 | 6.028e-01 | 1.727e+02 | K | EPHIN TEMP |
| HKEBOXTEMP | 320.13 | 3.75 | -2.972e-01 | 1.821e+02 | K | EPHIN HOUSEKEEPING EBOX: TEMPERATURE (5EHSE300) |
| HKGHV | 0.000e+00 | 0.000e+00 | 0.000e+00 | 0.000e+00 | HKGHV | |
| HKN6I | 73.16 | 0.31 | -9.759e-03 | 1.168e+01 | AMP | HK 6 Volts Rail - Current |
| HKN6V | -5.99 | 0.000e+00 | 0.000e+00 | 0.000e+00 | V | HK -6 Volts Rail - Voltage |
| HKP27I | 7.19 | 7.455e-02 | 5.448e-02 | 8.188e-01 | AMP | HK 27 Volts Rail - Current |
| HKP27V | 26.79 | 8.022e-04 | 1.978e-04 | 0.000e+00 | V | HK 27 Volts Rail - Voltage |
| HKP5I | 39.25 | 0.36 | -1.404e-01 | -9.134e-01 | AMP | HK 5 Volts Rail - Current |
| HKP5V | 5.10 | 0.000e+00 | 0.000e+00 | 0.000e+00 | V | HK 5 Volts Rail - Voltage |
| HKP6I | 135.89 | 0.53 | -1.297e-01 | 1.630e+01 | AMP | HK 6 Volts Rail - Current |
| HKP6V | 5.81 | 6.842e-03 | 9.491e-03 | -1.123e-01 | V | HK 6 Volts Rail - Voltage |
| TEIO | 313.60 | 18.67 | -3.086e+01 | 3.492e+02 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 315.58 | 3.85 | -1.221e+00 | 1.851e+02 | K | EPHIN SENSOR HOUSING TEMP |
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Spacecraft Motions
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Reaction Wheel Rotations
Links to Past Monthly Reports
| Year | Month | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | Jul | Aug | Sep | Oct | Nov | Dec | ||||||
| 2000 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2001 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2002 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2003 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2004 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2005 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2006 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2007 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2008 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2009 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | ||