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_feb23 6004901 4.178 8.444 0.0 4256 I2 node 0 262654 2.931740 1.988156 0.0 45.0 I2 node 1 262654 3.097024 8.667451 0.0 4256.0 I2 node 2 262654 2.986745 1.986316 0.0 64.0 I2 node 3 262654 2.927880 2.168863 0.0 337.0 I3 node 0 262654 3.523297 3.940376 0.0 1674.0 I3 node 1 262654 3.443505 9.448731 0.0 3495.0 I3 node 2 262654 3.378265 2.065468 0.0 67.0 I3 node 3 262654 3.431610 2.159646 0.0 191.0 S2 node 0 262654 5.103431 3.783303 0.0 75.0 S2 node 1 262654 5.609018 4.724735 0.0 255.0 S2 node 2 262654 7.717555 9.929738 0.0 209.0 S2 node 3 262654 8.117049 12.743382 0.0 4080.0 S3 node 0 262654 9.469719 13.916714 0.0 291.0 S3 node 1 262654 10.184609 16.283198 0.0 3470.0 S3 node 2 262654 10.318919 13.887594 0.0 192.0 S3 node 3 262654 7.964107 8.078762 0.0 119.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2624.295 3351.688 0.0 144868 I2 node 0 262654 2279.686835 460.084820 489.0 14142.0 I2 node 1 262654 2400.262907 660.206631 502.0 142862.0 I2 node 2 262654 2428.829276 514.014642 525.0 14983.0 I2 node 3 262654 2433.209661 627.753830 488.0 29569.0 I3 node 0 262654 2617.030748 641.985437 489.0 14198.0 I3 node 1 262654 2700.219927 1743.428623 514.0 55907.0 I3 node 2 262654 2412.874592 450.120027 485.0 14465.0 I3 node 3 262654 2394.068734 484.571021 457.0 35232.0 S2 node 0 262654 3056.555986 495.700672 1656.0 22457.0 S2 node 1 262654 3241.525214 736.934333 1841.0 17488.0 S2 node 2 262654 3585.977428 736.272301 2254.0 31150.0 S2 node 3 262654 3547.704683 593.771419 1990.0 76255.0 S3 node 0 262654 5431.768470 2962.986690 2383.0 54577.0 S3 node 1 262654 6643.566748 2379.158589 0.0 56100.0 S3 node 2 262654 5375.346917 1361.234103 2477.0 27363.0 S3 node 3 262654 4205.584761 761.853398 2542.0 26535.0
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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 2023 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -108.25 | +/- 6.58 C |
| Mean Width: | |
| 1.17 | +/- 0.93 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_02_2023.fits 16777216 na na na na
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_02_2023.fits 16777216 na na na na
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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 Feb 2023
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2ceahvpt | 0.011 | 7.063e-04 | (2.79+/-0.02)e2 | -0.39 +/- 0.44 | K | CEA RADIATOR TEMPERATURE AT CENTER | |
|---|---|---|---|---|---|---|---|
| 2chtrpzt | 0.012 | 7.317e-04 | (2.76+/-0.02)e2 | -0.44 +/- 0.45 | K | CENTRAL ELECTRONICS BOX TEMP | |
| 2condmxt | 0.016 | 9.667e-04 | (2.71+/-0.02)e2 | -1.05 +/- 0.53 | K | CONDUIT -X FACE TEMPERATURE | |
| 2dcentrt | 0.009 | 4.235e-04 | (2.74+/-0.01)e2 | 0.05 +/- 0.22 | K | DETECTOR HOUSING TEMP 2 | |
| 2dtstatt | 0.008 | 4.400e-04 | (2.70+/-0.01)e2 | -0.08 +/- 0.22 | K | DETECTOR HOUSING TEMP 1 | |
| 2fhtrmzt | 0.016 | 8.982e-04 | (2.65+/-0.02)e2 | -0.87 +/- 0.58 | K | FRONT END ELECTRONICS BOX TEMPERATURE | |
| 2fradpyt | 0.016 | 9.837e-04 | (2.63+/-0.02)e2 | -1.07 +/- 0.62 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP | |
| 2pmt1t | 0.015 | 0.001 | (2.84+/-0.03)e2 | -0.92 +/- 0.70 | K | PMT 1 TEMPERATURE | |
| 2pmt2t | 0.015 | 0.001 | (2.84+/-0.03)e2 | -0.90 +/- 0.70 | K | PMT 2 TEMPERATURE | |
| 2uvlspxt | 0.012 | 6.648e-04 | (2.75+/-0.02)e2 | -0.52 +/- 0.49 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP | |
- HRC HK
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2fe00atm | 4.074e-04 | 2.839e-05 | 22.37 +/- 2.04 | (0.00+/-0.00)e0 | C | Front end temperature | |
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| 2fepratm | on | 0.075 | 0.004 | 25.19 +/- 1.89 | -2.48 +/- 1.79 | C | FE temp card temperature | off | -0.009 | 4.469e-04 | 24.56 +/- 2.90 | (0.00+/-0.00)e0 |
| 2imhvatm | on | 0.046 | 0.003 | 31.71 +/- 1.25 | -1.31 +/- 1.13 | C | Imaging det HVPS temperature | off | -4.361e-04 | 3.439e-04 | 31.73 +/- 2.17 | (0.00+/-0.00)e0 |
| 2iminatm | on | 0.064 | 0.003 | 20.52 +/- 1.59 | -1.25 +/- 1.57 | C | Imaging det temperature | off | -0.004 | 3.855e-04 | 20.19 +/- 2.45 | (0.00+/-0.00)e0 |
| 2lvplatm | on | 0.036 | 0.003 | 28.00 +/- 1.17 | -1.19 +/- 1.10 | C | LVPS plate temperature | off | -0.002 | 3.484e-04 | 28.05 +/- 2.20 | (0.00+/-0.00)e0 |
| 2prbscr | on | 0.001 | 1.075e-04 | 1.76 +/- 0.05 | -0.03 +/- 0.05 | AMP | Primary bus current | off | 1.990e-04 | 1.199e-05 | 1.74 +/- 0.08 | (0.00+/-0.00)e0 |
| 2prbsvl | -2.799e-04 | 4.243e-06 | 27.32 +/- 0.32 | (0.00+/-0.00)e0 | V | Primary bus voltage | |
| 2smtratm | on | 2.481e-13 | 2.768e-09 | 5.94 +/- 0.00 | (2.46+/-13.58)e-13 | C | Selected motor temperature | off | -7.567e-05 | 3.315e-06 | 5.94 +/- 0.02 | (0.00+/-0.00)e0 |
| 2sphvatm | on | -0.002 | 0.003 | 31.48 +/- 1.19 | -0.02 +/- 1.24 | C | Spect det HVPS temperature | off | 0.005 | 3.894e-04 | 31.98 +/- 2.49 | (0.00+/-0.00)e0 |
| 2spinatm | on | 0.054 | 0.003 | 19.08 +/- 1.49 | -1.14 +/- 1.53 | C | Spect det temperature | off | -0.001 | 3.648e-04 | 19.00 +/- 2.30 | (0.00+/-0.00)e0 |
- PCAD Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| aacccdpt | 0.031 | 0.003 | (2.66+/-0.08)e2 | 0.16 +/- 1.05 | K | AC CCD TEMP (PRI) | |
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| aacccdrt | 0.020 | 0.001 | (3.09+/-0.03)e2 | -0.67 +/- 0.71 | K | AC CCD TEMP (RDNT) | |
| aach1t | 0.020 | 0.001 | (3.06+/-0.03)e2 | -0.55 +/- 0.73 | K | AC HOUSING TEMP (ACH1) | |
| aach2t | 0.020 | 0.001 | (3.06+/-0.03)e2 | -0.52 +/- 0.73 | 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
