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_jul18 6004901 7.867 11.391 0.0 5454 I2 node 0 262654 8.984753 3.835282 0.0 54.0 I2 node 1 262654 9.507832 6.940347 0.0 2530.0 I2 node 2 262654 9.332245 3.858265 0.0 91.0 I2 node 3 262654 9.246839 10.266755 0.0 2533.0 I3 node 0 262654 10.325467 4.193191 0.0 66.0 I3 node 1 262654 10.534774 5.495576 0.0 167.0 I3 node 2 262654 9.788689 3.911545 0.0 87.0 I3 node 3 262654 9.943998 4.008307 0.0 166.0 S2 node 0 262654 9.028707 17.316411 0.0 5454.0 S2 node 1 262654 9.338165 4.046186 0.0 65.0 S2 node 2 262654 10.455928 8.462463 0.0 1046.0 S2 node 3 262654 11.972916 10.771705 0.0 820.0 S3 node 0 262654 17.934406 16.409124 0.0 301.0 S3 node 1 262654 18.548522 13.328605 0.0 646.0 S3 node 2 262654 16.881330 11.264152 0.0 306.0 S3 node 3 262654 15.328618 9.382707 0.0 212.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2220.933 2877.401 0.0 124861 I2 node 0 262654 1910.510641 378.079189 396.0 10770.0 I2 node 1 262654 2011.131201 526.717305 417.0 80051.0 I2 node 2 262654 2042.414678 433.470134 414.0 10660.0 I2 node 3 262654 2047.734317 529.943293 404.0 28482.0 I3 node 0 262654 2166.474183 535.944858 398.0 8679.0 I3 node 1 262654 2249.867543 1663.667882 414.0 54907.0 I3 node 2 262654 1979.139565 366.926566 397.0 11124.0 I3 node 3 262654 1968.465574 393.924868 347.0 31225.0 S2 node 0 262654 2585.052788 404.431278 1469.0 21765.0 S2 node 1 262654 2742.842787 612.177581 1609.0 15105.0 S2 node 2 262654 3036.359953 624.503499 2058.0 27682.0 S2 node 3 262654 2977.185068 477.272497 1808.0 54340.0 S3 node 0 262654 4583.153952 2084.607697 2015.0 26864.0 S3 node 1 262654 5801.122456 2232.021001 0.0 28685.0 S3 node 2 262654 4565.948326 1229.102223 1919.0 24923.0 S3 node 3 262654 3515.868557 649.010727 2162.0 24525.0
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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
Jul 2018 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.62 | +/- 3.37 C |
| Mean Width: | |
| 0.83 | +/- 0.24 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.
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_07_2018.fits 16777216 0.032 0.180 0.000 4.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_07_2018.fits 16777216 5.352 5.383 0.000 295.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_07_2018.fits 16777216 0.065 0.377 0.000 27.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_07_2018.fits 16777216 17.575 32.338 0.000 1729.000
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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
Grating Trends/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 Trends 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 Jul 2018
Sun Spot History
Trending
Quarterly Trends
- ACIS Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 208.78 | 2.51 | -4.283e+00 | 2.458e+01 | K | CAMERA BODY TEMP. A |
| 1CRAT | 148.75 | 2.90 | -3.060e+00 | 1.718e+01 | K | COLD RADIATOR TEMP. A |
| 1CRBT | 149.48 | 2.99 | -3.373e+00 | 1.927e+01 | K | COLD RADIATOR TEMP. B |
| 1DACTBT | 258.41 | 3.14 | 4.803e-02 | -2.834e+01 | K | DA COLLIMATOR TEMP. B |
| 1DEAMZT | 291.30 | 8.07 | -1.118e+01 | 1.411e+01 | K | DEA -Z PANEL TEMP |
| 1DPAMYT | 291.57 | 8.03 | -1.092e+01 | 1.277e+02 | K | DPA -Y PANEL TEMP |
| 1DPAMZT | 294.63 | 7.79 | -1.093e+01 | 1.030e+02 | K | DPA -Z PANEL TEMP |
| 1OAHAT | 245.93 | 2.45 | -2.034e+00 | -1.223e+00 | K | OPEN ACTUATOR HOUSING TEMP. A |
| 1OAHBT | 241.90 | 2.25 | -1.760e+00 | 2.689e+01 | K | OPEN ACTUATOR HOUSING TEMP. B |
| 1PDEAAT | 304.02 | 6.76 | 1.887e+01 | -1.576e+02 | K | PSMC DEA PS A TEMP |
| 1PDEABT | 296.10 | 6.51 | 1.894e+01 | -1.289e+02 | K | PSMC DEA PS B TEMP |
| 1PIN1AT | 336.66 | 11.09 | 5.871e+00 | -1.605e+02 | K | PSMC TEMP 1A |
| 1WRAT | 191.66 | 2.52 | -4.316e+00 | 3.982e+01 | K | WARM RADIATOR TEMP. A |
| 1WRBT | 191.35 | 2.52 | -4.005e+00 | 2.983e+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 | 8.055e-06 | 4.512e-05 | 9.841e-06 | -1.046e-05 | 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 | 28.32 | 0.14 | 6.246e-01 | -7.664e+00 | V | DEA +28V INPUT B |
| 1DEICBCU | 16.39 | 2.114e-02 | 5.156e-02 | -5.105e-01 | AMP | DEA INPUT CURRENT B |
| 1DEN0BVO | -0.16 | 1.482e-02 | -2.229e-02 | 4.027e-01 | V | DEA -6V VOLTAGE B |
| 1DEN1BVO | -0.35 | 4.103e-02 | -5.479e-02 | 1.762e+00 | V | DEA -15V VOLTAGE B |
| 1DEP0BVO | 0.06 | 1.524e-02 | 1.617e-02 | -7.293e-01 | V | DEA +6V VOLTAGE B |
| 1DEP1BVO | 0.15 | 3.894e-02 | 4.349e-02 | -1.652e+00 | V | DEA +15V ANALOG B |
| 1DEP2BVO | 0.24 | 5.870e-02 | 6.872e-02 | -1.924e+00 | V | DEA +24V ANALOG B |
| 1DEP3BVO | 0.29 | 7.670e-02 | 8.652e-02 | -3.580e+00 | V | DEA +28V ANALOG B |
| 1DP28BVO | 28.33 | 0.13 | 6.269e-01 | -8.037e+00 | V | DPA +28V INPUT B |
| 1DPICBCU | 1.00 | 0.27 | 1.828e-01 | -9.260e+00 | AMP | DPA INPUT CURRENT B |
| 1DPP0BVO | 5.23 | 3.898e-02 | 3.912e-02 | -1.417e+00 | 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 | 358.91 | 19.22 | -5.805e+00 | 4.059e+01 | K | EIO TEMP |
| 5EPHINT | 334.75 | 6.54 | -1.764e+01 | 5.935e+01 | K | EPHIN TEMP |
| HKEBOXTEMP | 340.10 | 6.74 | -1.776e+01 | 6.365e+01 | K | EPHIN HOUSEKEEPING EBOX: TEMPERATURE (5EHSE300) |
| HKN6I | 73.54 | 0.46 | 2.997e+00 | -1.486e+01 | AMP | HK 6 Volts Rail - Current |
| HKN6V | -5.96 | 9.139e-03 | -8.491e-03 | -6.432e-02 | V | HK -6 Volts Rail - Voltage |
| HKP27I | 6.95 | 0.11 | 2.630e-01 | -1.531e+00 | AMP | HK 27 Volts Rail - Current |
| HKP27V | 26.88 | 4.970e-02 | -9.333e-02 | -4.285e-01 | V | HK 27 Volts Rail - Voltage |
| HKP5I | 48.20 | 1.96 | -5.075e+00 | -2.924e+01 | AMP | HK 5 Volts Rail - Current |
| HKP5V | 5.08 | 9.880e-03 | 2.453e-02 | -2.936e-02 | V | HK 5 Volts Rail - Voltage |
| HKP6I | 137.60 | 0.86 | -2.626e+00 | 6.660e+00 | AMP | HK 6 Volts Rail - Current |
| HKP6V | 5.77 | 1.434e-02 | 2.661e-02 | -1.631e-01 | V | HK 6 Volts Rail - Voltage |
| TEIO | 332.33 | 19.96 | -1.063e+01 | 6.121e+01 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 335.07 | 6.59 | -1.677e+01 | 5.760e+01 | K | EPHIN SENSOR HOUSING TEMP |
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Envelope Trending
- 4rt556t
- 4rt557t
- 4rt559t
- 4rt561t
- aothrst4
- hfrdbgrd11
- hfrdbgrd12
- hkp6v
- hrmastrutrnge
- hstrtgrd4
- hstrtgrd5
- hstrtgrd6
- htftegrd11
- htftegrd7
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
