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_aug20 6004901 6.308 15.433 0.0 3114 I2 node 0 262654 5.819430 2.885754 0.0 53.0 I2 node 1 262654 6.112497 4.644117 0.0 1778.0 I2 node 2 262654 5.940810 2.900054 0.0 63.0 I2 node 3 262654 6.008519 3.292196 0.0 535.0 I3 node 0 262654 7.382319 3.486875 0.0 128.0 I3 node 1 262654 7.186468 6.673238 0.0 2960.0 I3 node 2 262654 7.097680 3.187974 0.0 95.0 I3 node 3 262654 7.059473 6.884173 0.0 3114.0 S2 node 0 262654 6.658383 7.353824 0.0 552.0 S2 node 1 262654 6.989912 8.567365 0.0 749.0 S2 node 2 262654 7.330411 8.742987 0.0 569.0 S2 node 3 262654 7.215831 10.366577 0.0 1977.0 S3 node 0 262654 13.905051 51.222235 0.0 2265.0 S3 node 1 262654 12.940223 14.421204 0.0 854.0 S3 node 2 262654 12.523568 12.559949 0.0 255.0 S3 node 3 262654 11.445763 12.253646 0.0 328.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2421.826 3118.390 0.0 135037 I2 node 0 262654 2099.014356 419.541476 445.0 12321.0 I2 node 1 262654 2207.719799 592.480956 456.0 111162.0 I2 node 2 262654 2235.246270 472.750230 471.0 12688.0 I2 node 3 262654 2240.564230 578.188248 448.0 28709.0 I3 node 0 262654 2396.387215 589.553736 448.0 11847.0 I3 node 1 262654 2475.102961 1710.484714 477.0 55508.0 I3 node 2 262654 2195.571677 409.503324 441.0 12814.0 I3 node 3 262654 2187.616989 440.620773 413.0 33431.0 S2 node 0 262654 2824.511275 450.172828 1552.0 22124.0 S2 node 1 262654 2993.491402 671.675311 1732.0 16336.0 S2 node 2 262654 3308.389901 670.690997 2152.0 27920.0 S2 node 3 262654 3267.489110 527.802633 1908.0 64990.0 S3 node 0 262654 4999.696381 2394.872366 2182.0 35392.0 S3 node 1 262654 6222.652789 2322.009412 0.0 34804.0 S3 node 2 262654 4956.708372 1292.699079 2185.0 25988.0 S3 node 3 262654 3847.302642 684.791809 2351.0 25404.0
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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 2020 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.31 | +/- 3.58 C |
| Mean Width: | |
| 0.87 | +/- 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 |
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| 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_2020.fits 16777216 0.004 0.066 0.000 2.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_08_2020.fits 16777216 6.441 6.038 0.000 306.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_2020.fits 16777216 0.016 0.128 0.000 3.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_08_2020.fits 16777216 19.086 34.394 0.000 1750.000
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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 | |
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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
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Gyro Bias Drift
Radiation History
Radiation Count Rates of Aug 2020
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2ceahvpt | -0.022 | 0.002 | (2.99+/-0.04)e2 | -2.37 +/- 0.88 | K | CEA RADIATOR TEMPERATURE AT CENTER | |
|---|---|---|---|---|---|---|---|
| 2chtrpzt | -0.022 | 0.002 | (2.96+/-0.04)e2 | -2.31 +/- 0.89 | K | CENTRAL ELECTRONICS BOX TEMP | |
| 2condmxt | -0.027 | 0.002 | (2.92+/-0.04)e2 | -2.53 +/- 0.94 | K | CONDUIT -X FACE TEMPERATURE | |
| 2dcentrt | -0.020 | 0.001 | (2.92+/-0.03)e2 | -0.82 +/- 0.78 | K | DETECTOR HOUSING TEMP 2 | |
| 2dtstatt | -0.028 | 0.002 | (2.92+/-0.04)e2 | -1.33 +/- 0.85 | K | DETECTOR HOUSING TEMP 1 | |
| 2fhtrmzt | -0.039 | 0.002 | (2.94+/-0.05)e2 | -3.59 +/- 1.06 | K | FRONT END ELECTRONICS BOX TEMPERATURE | |
| 2fradpyt | -0.037 | 0.002 | (2.90+/-0.05)e2 | -2.86 +/- 1.08 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP | |
| 2pmt1t | -0.006 | 0.001 | (2.94+/-0.03)e2 | 1.81 +/- 0.88 | K | PMT 1 TEMPERATURE | |
| 2pmt2t | -0.008 | 0.001 | (2.96+/-0.03)e2 | 1.34 +/- 0.89 | K | PMT 2 TEMPERATURE | |
| 2uvlspxt | -0.013 | 0.001 | (2.88+/-0.03)e2 | 0.08 +/- 0.90 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP | |
- HRC HK
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2fe00atm | -4.661e-04 | 8.426e-04 | 21.53 +/- 1.82 | 1.02 +/- 0.72 | C | Front end temperature | |
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| 2fepratm | on | -9.815e-04 | 9.489e-04 | 24.16 +/- 2.05 | 1.15 +/- 0.81 | C | FE temp card temperature | off | -6.097 | 1.447 | 7.62 +/- 8.61 | (0.00+/-0.00)e0 |
| 2imhvatm | on | -0.008 | 7.522e-04 | 31.24 +/- 1.65 | -0.32 +/- 0.53 | C | Imaging det HVPS temperature | off | -4.363 | 0.701 | 18.86 +/- 5.45 | (0.00+/-0.00)e0 |
| 2iminatm | on | -0.001 | 8.718e-04 | 18.60 +/- 1.88 | -0.44 +/- 0.68 | C | Imaging det temperature | off | -4.812 | 0.629 | 4.79 +/- 5.76 | (0.00+/-0.00)e0 |
| 2lvplatm | on | -4.281e-04 | 7.460e-04 | 27.57 +/- 1.61 | -0.49 +/- 0.54 | C | LVPS plate temperature | off | -4.013 | 0.773 | 15.90 +/- 5.26 | (0.00+/-0.00)e0 |
| 2prbscr | on | -4.063e-05 | 1.588e-05 | 1.57 +/- 0.03 | 0.01 +/- 0.01 | AMP | Primary bus current | off | 0.028 | 0.008 | 1.66 +/- 0.04 | (0.00+/-0.00)e0 |
| 2prbsvl | 0.002 | 4.850e-05 | 27.62 +/- 0.12 | 0.01 +/- 0.02 | V | Primary bus voltage | |
| 2smtratm | on | -8.385e-04 | 1.278e-05 | 5.69 +/- 0.04 | (6.85+/-2.86)e-13 | C | Selected motor temperature | off | 0.000e+00 | 2.385e-08 | 5.66 +/- 0.00 | (0.00+/-0.00)e0 |
| 2sphvatm | on | 0.008 | 8.302e-04 | 31.51 +/- 1.82 | -0.44 +/- 0.60 | C | Spect det HVPS temperature | off | -4.069 | 0.677 | 19.17 +/- 5.12 | (0.00+/-0.00)e0 |
| 2spinatm | on | 7.057e-04 | 8.691e-04 | 19.75 +/- 1.86 | -0.45 +/- 0.65 | C | Spect det temperature | off | -4.518 | 0.578 | 6.97 +/- 5.39 | (0.00+/-0.00)e0 |
- PCAD Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| aacccdpt | -0.012 | 5.602e-04 | (2.64+/-0.01)e2 | -0.20 +/- 0.45 | K | AC CCD TEMP (PRI) | |
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| aacccdrt | -0.012 | 5.759e-04 | (3.08+/-0.01)e2 | -0.23 +/- 0.48 | K | AC CCD TEMP (RDNT) | |
| aach1t | -0.012 | 5.679e-04 | (3.05+/-0.01)e2 | -0.20 +/- 0.47 | K | AC HOUSING TEMP (ACH1) | |
| aach2t | -0.012 | 5.694e-04 | (3.05+/-0.01)e2 | -0.23 +/- 0.47 | K | AC HOUSING TEMP (ACH2) | |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
