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_jan11 6004901 11.01 15.71 0.0 797 I2 node 0 262654 11.434826 4.377774 0.0 74.0 I2 node 1 262654 12.155060 5.035165 0.0 477.0 I2 node 2 262654 11.928772 4.483159 0.0 98.0 I2 node 3 262654 11.792841 4.974158 0.0 501.0 I3 node 0 262654 11.745912 4.564194 0.0 65.0 I3 node 1 262654 12.602516 12.752380 0.0 310.0 I3 node 2 262654 11.326021 4.279331 0.0 68.0 I3 node 3 262654 11.364937 4.309791 0.0 183.0 S2 node 0 262654 13.778910 4.697110 0.0 98.0 S2 node 1 262654 14.064566 5.779840 0.0 110.0 S2 node 2 262654 14.699456 5.436096 0.0 631.0 S2 node 3 262654 13.931775 4.909840 0.0 791.0 S3 node 0 262654 21.480132 17.329601 0.0 215.0 S3 node 1 262654 22.054774 12.149794 0.0 127.0 S3 node 2 262654 17.681870 4.742408 2.0 61.0 S3 node 3 262654 17.946281 4.582455 3.0 135.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1473.87 1982.03 0.0 89563.0 I2 node 0 262654 1212.896416 232.543374 0.0 5912.0 I2 node 1 262654 1279.784684 310.803653 0.0 23667.0 I2 node 2 262654 1315.799343 285.749478 0.0 8784.0 I2 node 3 262654 1311.391729 334.813039 0.0 27603.0 I3 node 0 262654 1376.381007 337.267863 0.0 6287.0 I3 node 1 262654 1443.234467 1077.664505 0.0 27814.0 I3 node 2 262654 1251.231201 225.593658 0.0 5837.0 I3 node 3 262654 1237.739254 240.793679 0.0 22317.0 S2 node 0 262654 1766.108747 243.335281 902.0 20059.0 S2 node 1 262654 1878.174665 399.846104 931.0 10251.0 S2 node 2 262654 2082.612358 392.543439 1190.0 14599.0 S2 node 3 262654 2008.015854 288.912143 1168.0 30473.0 S3 node 0 262654 2980.466242 1433.372436 1237.0 11847.0 S3 node 1 262654 4236.912862 1871.136637 0.0 12419.0 S3 node 2 262654 3209.846615 890.674517 1171.0 8069.0 S3 node 3 262654 2454.043569 398.917036 1330.0 9117.0
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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
Jan 2011 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.38 | +/- 8.71 C |
| Mean Width: | |
| 0.47 | +/- 0.34 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 |
ACIS Corner Pixels
We plot the average corner pixel centroid slope and mean for ACIS observations. Separate plots are shown for FAINT MODE (3X3) and VFAINT MODE (5X5) observations. Metric is the centroid of a Gaussian fit to the histogram of corner pixel PHA values of detected events. Plus signs are FAINT observations, diamonds are VFAINT observations, and boxes are VFAINT observations with centroids computed using only the corner pixels of a 3X3 event island (referred to as AFAINT). We see a very small upward trend.
CCD: I3
CCD: S3
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.
An example of Overclock values as reported in FITS file header:
An example of mean bias minus overclock value:
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_01_2011.fits 16777216 0.036 0.192 0.0 4.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_01_2011.fits 16777216 3.466 4.268 0.0 292.0
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_01_2011.fits 16777216 13.340 22.281 0.0 1622.0
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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
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 Jan 2011
Sun Spot History
Trending
Quarterly Trends
- ACIS Thermal
- SIM Electronics
- HRMA Thermal
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 204.93 | 1.90 | -2.303e-01 | 1.116e+02 | K | CAMERA BODY TEMP. A |
| 1CBBT | 205.38 | 1.99 | -2.499e-01 | 1.072e+02 | K | CAMERA BODY TEMP. B |
| 1CRAT | 146.09 | 1.60 | -2.241e+00 | 7.516e+01 | K | COLD RADIATOR TEMP. A |
| 1CRBT | 146.62 | 1.96 | -3.022e+00 | 9.765e+01 | K | COLD RADIATOR TEMP. B |
| 1DACTBT | 257.12 | 1.67 | -1.780e+00 | 1.319e+01 | K | DA COLLIMATOR TEMP. B |
| 1DEAMZT | 287.07 | 6.05 | 2.600e+00 | 2.219e+02 | K | DEA -Z PANEL TEMP |
| 1DPAMYT | 288.44 | 6.38 | 3.819e+00 | 2.665e+02 | K | DPA -Y PANEL TEMP |
| 1DPAMZT | 291.59 | 6.16 | 3.328e+00 | 2.626e+02 | K | DPA -Z PANEL TEMP |
| 1OAHAT | 242.49 | 1.58 | -6.179e-01 | 7.487e+01 | K | OPEN ACTUATOR HOUSING TEMP. A |
| 1OAHBT | 238.63 | 1.42 | -4.743e-01 | 6.493e+01 | K | OPEN ACTUATOR HOUSING TEMP. B |
| 1PDEAAT | 305.24 | 8.80 | -1.214e+01 | -1.677e+02 | K | PSMC DEA PS A TEMP |
| 1PDEABT | 296.80 | 8.74 | -1.226e+01 | -1.501e+02 | K | PSMC DEA PS B TEMP |
| 1PIN1AT | 291.76 | 7.91 | -1.096e+01 | -1.068e+02 | K | PSMC TEMP 1A |
| 1WRAT | 188.18 | 2.05 | -1.074e+00 | 1.034e+02 | K | WARM RADIATOR TEMP. A |
| 1WRBT | 187.96 | 2.04 | -1.370e+00 | 1.119e+02 | K | WARM RADIATOR TEMP. B |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AGRNDADC | 5.551e-04 | 2.041e-04 | -6.650e-05 | 1.217e-02 | V | Analog ground A/D convert reading |
| FATABADC | 5.00 | 1.711e-03 | 7.801e-04 | 6.803e-02 | Converter | FA Tab Position Sensor A/D |
| N15VADC | -15.01 | 5.033e-04 | -7.081e-04 | 3.145e-02 | Reading | -15V Power Supply A/D Converter |
| P15VADC | 14.96 | 5.219e-04 | 1.496e-04 | 4.546e-02 | Reading | +5V Power Supply A/D Converter |
| P5VADC | 4.97 | 1.658e-02 | 4.304e-03 | 1.049e+00 | Reading | +5V Power Supply A/D Converter |
| TSCTABADC | 5.00 | 4.137e-03 | 3.463e-03 | 3.298e-01 | converter | TSC Tab Position Sensor A/D |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 4RT575T | 290.00 | 0.84 | 2.598e+00 | -1.160e+02 | K | RT 575 - OB CONE TEMP |
| 4RT576T | 284.11 | 0.63 | 1.672e+00 | -9.185e+01 | K | RT 576 - OB CONE TEMP |
| 4RT577T | 290.31 | 1.86 | 2.330e+00 | -2.020e+02 | K | RT 577 - OB CONE TEMP |
| 4RT578T | 288.31 | 1.52 | 2.101e+00 | -1.715e+02 | K | RT 578 - OB CONE TEMP |
| 4RT579T | 285.23 | 1.31 | 1.348e+00 | -1.208e+02 | K | RT 579 - OB CONE TEMP |
| 4RT580T | 284.90 | 1.25 | 1.364e+00 | -1.208e+02 | K | RT 580 - OB CONE TEMP |
| 4RT581T | 287.07 | 2.44 | 6.010e-01 | -2.117e+02 | K | RT 581 - OB CONE TEMP |
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Spacecraft Motions
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Reaction Wheel Rotations
Note: From Feb 2010, the computation of reaction wheel rotations are slightly modified.
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 | Nov | Dec |
| 2010 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |