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_feb20 6004901 6.483 8.416 0.0 927 I2 node 0 262654 5.687007 2.868884 0.0 56.0 I2 node 1 262654 5.882680 2.983210 0.0 154.0 I2 node 2 262654 5.814893 2.860670 0.0 61.0 I2 node 3 262654 5.795802 2.953988 0.0 57.0 I3 node 0 262654 8.379927 3.717030 0.0 199.0 I3 node 1 262654 7.857387 4.224303 0.0 927.0 I3 node 2 262654 7.719434 3.311631 0.0 72.0 I3 node 3 262654 7.914728 3.414839 0.0 136.0 S2 node 0 262654 8.241732 3.682562 0.0 392.0 S2 node 1 262654 8.601194 4.096831 0.0 260.0 S2 node 2 262654 8.927436 4.332026 0.0 294.0 S2 node 3 262654 8.715210 4.114523 0.0 474.0 S3 node 0 262654 10.716161 5.608791 0.0 102.0 S3 node 1 262654 12.095114 5.150472 0.0 847.0 S3 node 2 262654 12.164717 4.547997 0.0 58.0 S3 node 3 262654 10.942651 4.482172 0.0 55.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2370.067 3058.977 0.0 132492 I2 node 0 262654 2053.903158 409.576284 436.0 11946.0 I2 node 1 262654 2160.850418 575.803421 449.0 103164.0 I2 node 2 262654 2189.086698 463.257294 457.0 12195.0 I2 node 3 262654 2194.324213 565.897659 438.0 28655.0 I3 node 0 262654 2338.993302 576.080177 435.0 10412.0 I3 node 1 262654 2418.929844 1705.623380 458.0 55433.0 I3 node 2 262654 2140.143463 398.672765 435.0 12395.0 I3 node 3 262654 2132.576990 428.875157 396.0 32915.0 S2 node 0 262654 2764.209747 438.855595 1534.0 22006.0 S2 node 1 262654 2929.753844 656.765296 1700.0 16028.0 S2 node 2 262654 3239.192241 661.110668 2133.0 27854.0 S2 node 3 262654 3193.124490 520.953421 1887.0 62337.0 S3 node 0 262654 4882.129952 2332.341882 2137.0 34167.0 S3 node 1 262654 6109.681692 2296.551188 0.0 30131.0 S3 node 2 262654 4859.044244 1286.612547 2112.0 25786.0 S3 node 3 262654 3762.977630 680.076189 2309.0 25217.0
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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
Feb 2020 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.81 | +/- 2.52 C |
| Mean Width: | |
| 0.71 | +/- 0.29 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_02_2020.fits 16777216 0.016 0.130 0.000 8.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_02_2020.fits 16777216 6.160 5.939 0.000 303.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_02_2020.fits 16777216 0.096 0.322 0.000 7.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_02_2020.fits 16777216 18.801 33.944 0.000 1749.000
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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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| 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 Count Rates of Feb 2020
Sun Spot History
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2ceahvpt | -0.011 | 8.702e-04 | (3.02+/-0.02)e2 | 0.36 +/- 0.58 | K | CEA RADIATOR TEMPERATURE AT CENTER | |
|---|---|---|---|---|---|---|---|
| 2chtrpzt | -0.009 | 8.662e-04 | (2.98+/-0.02)e2 | 0.32 +/- 0.59 | K | CENTRAL ELECTRONICS BOX TEMP | |
| 2condmxt | -0.010 | 0.001 | (2.95+/-0.02)e2 | 0.65 +/- 0.70 | K | CONDUIT -X FACE TEMPERATURE | |
| 2dcentrt | -0.010 | 7.827e-04 | (2.94+/-0.02)e2 | 0.80 +/- 0.55 | K | DETECTOR HOUSING TEMP 2 | |
| 2dtstatt | -0.009 | 7.765e-04 | (2.95+/-0.02)e2 | 0.85 +/- 0.54 | K | DETECTOR HOUSING TEMP 1 | |
| 2fhtrmzt | -0.009 | 8.718e-04 | (2.97+/-0.02)e2 | 1.20 +/- 0.58 | K | FRONT END ELECTRONICS BOX TEMPERATURE | |
| 2fradpyt | -0.009 | 9.115e-04 | (2.92+/-0.02)e2 | 1.32 +/- 0.60 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP | |
| 2pmt1t | -0.011 | 0.001 | (2.97+/-0.03)e2 | 0.70 +/- 0.74 | K | PMT 1 TEMPERATURE | |
| 2pmt2t | -0.011 | 0.001 | (2.99+/-0.03)e2 | 0.28 +/- 0.81 | K | PMT 2 TEMPERATURE | |
| 2uvlspxt | -0.009 | 9.437e-04 | (2.91+/-0.02)e2 | 0.70 +/- 0.69 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP | |
- HRC HK
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2fe00atm | -0.007 | 6.671e-04 | 22.93 +/- 1.55 | 0.63 +/- 0.45 | C | Front end temperature | |
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| 2fepratm | -0.008 | 7.322e-04 | 25.69 +/- 1.67 | 0.64 +/- 0.51 | C | FE temp card temperature | |
| 2imhvatm | -0.003 | 6.825e-04 | 32.81 +/- 1.56 | 0.34 +/- 0.45 | C | Imaging det HVPS temperature | |
| 2iminatm | -0.007 | 7.138e-04 | 20.68 +/- 1.64 | 0.81 +/- 0.52 | C | Imaging det temperature | |
| 2lvplatm | -0.006 | 6.569e-04 | 29.30 +/- 1.53 | 0.80 +/- 0.45 | C | LVPS plate temperature | |
| 2prbscr | 1.107e-04 | 1.474e-05 | 1.55 +/- 0.03 | -0.02 +/- 0.01 | AMP | Primary bus current | |
| 2prbsvl | -0.002 | 4.805e-05 | 27.05 +/- 0.13 | 0.03 +/- 0.02 | V | Primary bus voltage | |
| 2smtratm | -1.961e-04 | 1.414e-05 | 5.77 +/- 0.03 | 0.01 +/- 0.01 | C | Selected motor temperature | |
| 2sphvatm | -0.014 | 7.681e-04 | 33.22 +/- 1.86 | 0.75 +/- 0.46 | C | Spect det HVPS temperature | |
| 2spinatm | -0.008 | 7.237e-04 | 21.98 +/- 1.67 | 1.02 +/- 0.53 | C | Spect det temperature | |
- PCAD Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| aacccdpt | 0.006 | 4.610e-04 | (2.64+/-0.01)e2 | -0.79 +/- 0.36 | K | AC CCD TEMP (PRI) | |
|---|---|---|---|---|---|---|---|
| aacccdrt | 0.007 | 4.983e-04 | (3.08+/-0.01)e2 | -0.88 +/- 0.40 | K | AC CCD TEMP (RDNT) | |
| aach1t | 0.006 | 4.793e-04 | (3.05+/-0.01)e2 | -0.91 +/- 0.39 | K | AC HOUSING TEMP (ACH1) | |
| aach2t | 0.006 | 4.775e-04 | (3.05+/-0.01)e2 | -0.86 +/- 0.39 | 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
