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_aug18 6004901 8.396 12.137 0.0 5650 I2 node 0 262654 6.172578 3.014347 0.0 77.0 I2 node 1 262654 6.439455 11.414002 0.0 4671.0 I2 node 2 262654 6.353084 4.755695 0.0 1896.0 I2 node 3 262654 6.365887 3.231949 0.0 448.0 I3 node 0 262654 8.377015 3.989239 0.0 131.0 I3 node 1 262654 8.256964 6.450420 0.0 1813.0 I3 node 2 262654 7.789655 3.346439 0.0 77.0 I3 node 3 262654 7.848425 8.061525 0.0 3735.0 S2 node 0 262654 11.467341 4.228506 0.0 216.0 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 2229.329 2887.164 0.0 125360 I2 node 0 262654 1916.683219 379.485735 400.0 10847.0 I2 node 1 262654 2017.570656 530.053496 418.0 83071.0 I2 node 2 262654 2048.767762 434.804132 415.0 10733.0 I2 node 3 262654 2054.100204 531.489072 404.0 28484.0 I3 node 0 262654 2174.851198 538.190561 399.0 8694.0 I3 node 1 262654 2258.124507 1667.181182 415.0 54951.0 I3 node 2 262654 1986.929220 368.507091 399.0 11180.0 I3 node 3 262654 1976.313998 395.680808 351.0 31317.0 S2 node 0 262654 2596.520129 406.286026 1475.0 21777.0 S2 node 1 262654 2754.655637 615.009322 1617.0 15156.0 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
Aug 2018 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -113.72 | +/- 2.35 C |
| Mean Width: | |
| 0.93 | +/- 0.4 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 |
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_08_1999_08_2018.fits 16777216 5.352 5.383 0.000 295.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_2018.fits 16777216 0.037 0.197 0.000 4.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_08_2018.fits 16777216 17.611 32.365 0.000 1730.000
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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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HRMA Focus
Plots below show various characteristics of detected imaging sources. Standard level 2 data products (*src2.fits) are used. Only observations with focus (sim_x) within 0.01 mm of nominal value for given SI configuration are used. Sources are also filtered for strength (SNR > 15).
| XY | PSF | Roundness | EE Radius | SNR | Rotation | Rotation2 | |
|---|---|---|---|---|---|---|---|
| ACIS I |  |
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| ACIS S |  |
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| HRC I |  |
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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
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 Aug 2018
Sun Spot History
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 2CEAHVPT | 299.97 | 1.99 | 7.988e+00 | -4.505e+02 | K | CEA RADIATOR TEMPERATURE AT CENTER |
| 2CHTRPZT | 296.31 | 1.91 | 7.367e+00 | -4.071e+02 | K | CENTRAL ELECTRONICS BOX TEMP |
| 2CONDMXT | 293.04 | 2.21 | 2.664e+00 | -3.808e+02 | K | CONDUIT -X FACE TEMPERATURE |
| 2DCENTRT | 292.22 | 1.72 | 2.871e+00 | -4.092e+02 | K | DETECTOR HOUSING TEMP 2 |
| 2DTSTATT | 293.03 | 1.85 | -4.853e-01 | -3.766e+02 | K | DETECTOR HOUSING TEMP 1 |
| 2FHTRMZT | 295.24 | 2.19 | -3.087e+00 | -3.754e+02 | K | FRONT END ELECTRONICS BOX TEMPERATURE |
| 2FRADPYT | 291.01 | 2.33 | -4.205e+00 | -3.531e+02 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP |
| 2PMT1T | 294.24 | 2.34 | 5.269e+00 | -4.489e+02 | K | PMT 1 TEMPERATURE |
| 2PMT2T | 296.73 | 2.54 | 5.311e+00 | -4.474e+02 | K | PMT 2 TEMPERATURE |
| 2UVLSPXT | 288.13 | 2.06 | 5.029e+00 | -3.752e+02 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP |
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- HRC HK
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| FE00ATM | 21.86 | 1.71 | -2.548e+00 | -2.909e+02 | C | Front end temperature (2FE00ATM) |
| FEPRATM | 24.50 | 1.96 | -2.871e+00 | -3.380e+02 | C | FE temp card temperature (2FEPRATM) |
| IMHVATM | 31.19 | 1.49 | 2.043e+00 | -3.264e+02 | (2IMHVATM)C | |
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- PCAD Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AACCCDPT | 260.69 | 1.14 | 4.452e-01 | 1.127e+02 | K | AC CCD TEMP (PRI) |
| AACCCDRT | 304.52 | 1.18 | 4.320e-01 | 1.102e+02 | K | AC CCD TEMP (RDNT) |
| AACH1T | 301.80 | 1.25 | 4.118e-01 | 1.240e+02 | K | AC HOUSING TEMP (ACH1) |
| AACH2T | 301.86 | 1.25 | 3.951e-01 | 1.260e+02 | K | AC HOUSING TEMP (ACH2) |
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Envelope Trending
- htftegrd7
- htftegrd9
- ohrthr07
- ohrthr08
- ohrthr17
- ohrthr25
- ohrthr26
- ohrthr33
- ohrthr36
- ohrthr39
- ohrthr41
- ohrthr50
- ohrthr51
- ohrthr61
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
