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.
Please check more detail plots at Telemetered Photon Dose Trend page.
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Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_jan18 6004901 7.193 12.477 0.0 5483 I2 node 0 262654 5.985564 2.897862 0.0 36.0 I2 node 1 262654 6.349890 4.239220 0.0 1208.0 I2 node 2 262654 6.132201 2.904053 0.0 47.0 I2 node 3 262654 6.275277 10.840405 0.0 4084.0 I3 node 0 262654 6.615604 3.358280 0.0 660.0 I3 node 1 262654 6.820110 10.623787 0.0 4067.0 I3 node 2 262654 6.401042 2.946997 0.0 58.0 I3 node 3 262654 6.498907 6.681257 0.0 3045.0 S2 node 0 262654 10.267241 11.318410 0.0 3156.0 S2 node 1 262654 10.590935 7.660259 0.0 671.0 S2 node 2 262654 10.890989 8.114969 0.0 1214.0 S2 node 3 262654 10.957019 13.016134 0.0 4511.0 S3 node 0 262654 13.073280 16.499663 0.0 5483.0 S3 node 1 262654 15.488566 11.391393 0.0 406.0 S3 node 2 262654 15.222373 14.728005 0.0 2641.0 S3 node 3 262654 12.504980 4.750529 0.0 187.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2172.925 2819.598 0.0 122638 I2 node 0 262654 1864.900708 365.885923 386.0 10427.0 I2 node 1 262654 1963.157969 508.553478 407.0 71776.0 I2 node 2 262654 6.132201 2.904053 0.0 47.0 I2 node 3 262654 2000.323525 515.595728 391.0 28438.0 I3 node 0 262654 2115.255098 522.596869 385.0 8279.0 I3 node 1 262654 2198.015323 1639.873939 401.0 51433.0 I3 node 2 262654 1930.519655 355.249523 379.0 10747.0 I3 node 3 262654 6.498907 6.681257 0.0 3045.0 S2 node 0 262654 2530.842938 394.434195 1449.0 21681.0 S2 node 1 262654 10.590935 7.660259 0.0 671.0 S2 node 2 262654 2975.129389 611.434930 2039.0 27593.0 S2 node 3 262654 2921.490552 463.703388 1787.0 52500.0 S3 node 0 262654 4504.573066 2034.894405 1979.0 25416.0 S3 node 1 262654 5702.109392 2208.022089 0.0 28351.0 S3 node 2 262654 4475.085355 1208.948953 1864.0 24712.0 S3 node 3 262654 3450.730026 641.190324 2117.0 24369.0
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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
Imaging CCDs
Spectral CCDs
Backside CCDs
Focal Plane Temperature
Jan 2018 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -113.16 | +/- 1.65 C |
| Mean Width: | |
| 1.02 | +/- 0.58 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, Sun 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)
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 |
The following three plots show trends of SIB from year 2000. CCDs shown here are CCD3, CCD5, and CCD7. Fitted lines are linear fit after eliminating extreme outliers. For >10 keV plots, 2 lines are fit. One is with a 13 keV filter, and another without.
CCD 3
CCD 5
CCD 7
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.
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_01_2018.fits 16777216 5.083 5.280 0.000 293.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_01_2018.fits 16777216 0.434 3.679 0.000 307.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_01_2018.fits 16777216 17.271 31.895 0.000 1727.000
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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.
PCAD
ACA Trending
ACIS-1
ACIS-6
HRC-I-1
HRC-S-1
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 2018
Sun Spot History
Trending
Quarterly Trends
- ACIS Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 210.32 | 2.62 | -5.693e+00 | 3.296e+00 | K | CAMERA BODY TEMP. A |
| 1CRAT | 149.33 | 2.73 | 6.795e+00 | 3.700e+01 | K | COLD RADIATOR TEMP. A |
| 1CRBT | 150.05 | 2.76 | 6.279e+00 | 3.507e+01 | K | COLD RADIATOR TEMP. B |
| 1DACTBT | 259.04 | 3.34 | -1.681e-01 | -9.868e+01 | K | DA COLLIMATOR TEMP. B |
| 1DEAMZT | 293.22 | 8.48 | 6.475e+00 | 7.536e+01 | K | DEA -Z PANEL TEMP |
| 1DPAMYT | 294.46 | 8.11 | 4.985e+00 | 1.653e+02 | K | DPA -Y PANEL TEMP |
| 1DPAMZT | 297.47 | 8.00 | 4.961e+00 | 1.529e+02 | K | DPA -Z PANEL TEMP |
| 1OAHAT | 246.81 | 2.55 | 1.890e+00 | -3.635e+01 | K | OPEN ACTUATOR HOUSING TEMP. A |
| 1OAHBT | 242.77 | 2.35 | 2.225e+00 | -2.161e+01 | K | OPEN ACTUATOR HOUSING TEMP. B |
| 1PDEAAT | 305.43 | 6.78 | -1.608e+01 | -3.279e+01 | K | PSMC DEA PS A TEMP |
| 1PDEABT | 297.78 | 6.79 | -1.462e+01 | -3.491e+01 | K | PSMC DEA PS B TEMP |
| 1PIN1AT | 335.93 | 14.19 | 1.944e+01 | -1.699e+02 | K | PSMC TEMP 1A |
| 1WRAT | 192.59 | 2.38 | 4.695e+00 | 2.471e+01 | K | WARM RADIATOR TEMP. A |
| 1WRBT | 192.26 | 2.35 | 5.093e+00 | 1.327e+01 | K | WARM RADIATOR TEMP. B |
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- ACIS Electronics Side B
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1DAHBCU | 5.284e-06 | 3.544e-05 | 1.298e-05 | 0.000e+00 | AMP | DA HEATER CURRENT B |
| 1DAHBVO | 0.000e+00 | 0.000e+00 | 0.000e+00 | 0.000e+00 | V | DA HEATER VOLTAGE B |
| 1DAHHBVO | 0.000e+00 | 0.000e+00 | 0.000e+00 | 0.000e+00 | V | DA HOUSING HEATER INPUT VOLTAGE B |
| 1DE28BVO | 27.68 | 0.15 | -5.233e-01 | 9.975e+00 | V | DEA +28V INPUT B |
| 1DEICBCU | 16.39 | 2.337e-02 | -3.109e-02 | -1.846e-01 | AMP | DEA INPUT CURRENT B |
| 1DEN0BVO | -0.16 | 1.564e-02 | 6.081e-02 | -1.456e-01 | V | DEA -6V VOLTAGE B |
| 1DEN1BVO | -0.35 | 4.167e-02 | 1.454e-01 | -4.114e-01 | V | DEA -15V VOLTAGE B |
| 1DEP0BVO | 0.06 | 1.553e-02 | -5.837e-02 | 2.667e-01 | V | DEA +6V VOLTAGE B |
| 1DEP1BVO | 0.15 | 4.051e-02 | -1.612e-01 | 6.520e-01 | V | DEA +15V ANALOG B |
| 1DEP2BVO | 0.24 | 6.279e-02 | -2.511e-01 | 1.046e+00 | V | DEA +24V ANALOG B |
| 1DEP3BVO | 0.29 | 7.967e-02 | -3.143e-01 | 1.358e+00 | V | DEA +28V ANALOG B |
| 1DP28BVO | 27.70 | 0.15 | -5.589e-01 | 9.937e+00 | V | DPA +28V INPUT B |
| 1DPICBCU | 1.01 | 0.28 | -1.012e+00 | 4.715e+00 | AMP | DPA INPUT CURRENT B |
| 1DPP0BVO | 5.23 | 3.886e-02 | -1.471e-01 | 6.987e-01 | V | DPA +5V ANALOG B |
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- EPHIN Temperature and Voltage
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 5EIOT | 358.55 | 18.00 | -9.806e+00 | -2.383e+02 | K | EIO TEMP |
| 5EPHINT | 337.93 | 5.76 | 4.778e+00 | -8.394e+01 | K | EPHIN TEMP |
| HKEBOXTEMP | 343.40 | 5.83 | 4.382e+00 | -9.190e+01 | K | EPHIN HOUSEKEEPING EBOX: TEMPERATURE (5EHSE300) |
| HKN6I | 73.33 | 0.40 | -5.758e-01 | -3.552e+01 | AMP | HK 6 Volts Rail - Current |
| HKN6V | -5.96 | 5.360e-03 | 6.870e-03 | -2.325e-02 | V | HK -6 Volts Rail - Voltage |
| HKP27I | 6.91 | 8.605e-02 | -1.152e-01 | 3.661e+00 | AMP | HK 27 Volts Rail - Current |
| HKP27V | 26.89 | 4.346e-02 | 1.893e-02 | 7.113e-01 | V | HK 27 Volts Rail - Voltage |
| HKP5I | 51.39 | 1.56 | -4.872e+00 | -1.348e+02 | AMP | HK 5 Volts Rail - Current |
| HKP5V | 5.07 | 1.106e-02 | 1.269e-02 | 5.807e-01 | V | HK 5 Volts Rail - Voltage |
| HKP6I | 137.99 | 0.86 | 4.106e-01 | -2.021e+00 | AMP | HK 6 Volts Rail - Current |
| HKP6V | 5.76 | 1.364e-02 | -7.684e-03 | 5.712e-01 | V | HK 6 Volts Rail - Voltage |
| TEIO | 332.68 | 18.36 | -5.475e+00 | -2.738e+02 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 338.21 | 5.49 | 4.424e+00 | -1.122e+02 | K | EPHIN SENSOR HOUSING TEMP |
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Envelope Trending
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
Links to Past Monthly Reports
| Year | Month | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018 | ||||||||||||
| 2017 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2016 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2015 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2014 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2013 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2012 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2011 | 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 |
| 2009 | 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 |
| 2007 | 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 |
| 2005 | 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 |
| 2003 | 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 |
| 2001 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2000 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1999 | Jul | Aug | Sep | Oct | Nov | Dec | ||||||