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_feb24 6004901 3.889 4.964 0.0 2063 I2 node 0 262654 3.291360 2.112832 0.0 61.0 I2 node 1 262654 3.943986 4.097789 0.0 1683.0 I2 node 2 262654 3.680570 2.264956 0.0 93.0 I2 node 3 262654 3.358362 2.825841 0.0 881.0 I3 node 0 262654 3.756046 2.270021 0.0 85.0 I3 node 1 262654 4.060100 2.349815 0.0 112.0 I3 node 2 262654 4.134439 2.390958 0.0 81.0 I3 node 3 262654 3.681518 4.591352 0.0 2063.0 S2 node 0 262654 4.378699 2.545297 0.0 534.0 S2 node 1 262654 4.963329 2.797372 0.0 238.0 S2 node 2 262654 5.864491 5.076923 0.0 1333.0 S2 node 3 262654 5.801348 5.495694 0.0 465.0 S3 node 0 262654 8.091437 5.980689 0.0 72.0 S3 node 1 262654 8.733512 4.834805 0.0 75.0 S3 node 2 262654 9.116743 4.755241 0.0 68.0 S3 node 3 262654 7.136380 3.342574 0.0 42.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2678.537 3402.525 0.0 156594 I2 node 0 262654 2325.509957 471.000813 495.0 14904.0 I2 node 1 262654 2450.463094 682.846630 506.0 154588.0 I2 node 2 262654 2478.409235 525.287067 532.0 16118.0 I2 node 3 262654 2482.666574 642.783630 497.0 34070.0 I3 node 0 262654 2673.363091 658.892335 496.0 14677.0 I3 node 1 262654 2755.310811 1750.233879 518.0 55988.0 I3 node 2 262654 2465.384028 461.543302 491.0 14935.0 I3 node 3 262654 2445.007377 496.967171 460.0 35672.0 S2 node 0 262654 3123.682276 504.268406 1691.0 22541.0 S2 node 1 262654 3316.196775 754.598141 1870.0 18340.0 S2 node 2 262654 3676.616088 758.623754 2285.0 32498.0 S2 node 3 262654 3634.618362 613.349564 2007.0 80931.0 S3 node 0 262654 5536.068666 2994.073179 2436.0 54867.0 S3 node 1 262654 6755.455921 2386.203738 0.0 69061.0 S3 node 2 262654 5489.139055 1362.226725 2558.0 27490.0 S3 node 3 262654 4306.773257 769.249781 2599.0 26630.0
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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 2024 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -107.53 | +/- 7.69 C |
| Mean Width: | |
| 0.8 | +/- 0.58 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_2024.fits 16777216 0.018 0.135 0.000 6.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_02_2024.fits 16777216 na na na na
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_02_2024.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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| ACIS S |  |
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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 2024
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2ceahvpt | 0.001 | 5.568e-04 | (2.79+/-0.01)e2 | 0.14 +/- 0.41 | K | CEA RADIATOR TEMPERATURE AT CENTER | |
|---|---|---|---|---|---|---|---|
| 2chtrpzt | 7.657e-04 | 5.485e-04 | (2.76+/-0.01)e2 | 0.15 +/- 0.40 | K | CENTRAL ELECTRONICS BOX TEMP | |
| 2condmxt | 0.001 | 8.217e-04 | (2.70+/-0.02)e2 | -0.87 +/- 0.54 | K | CONDUIT -X FACE TEMPERATURE | |
| 2dcentrt | 7.479e-04 | 2.794e-04 | (2.74+/-0.01)e2 | 0.17 +/- 0.21 | K | DETECTOR HOUSING TEMP 2 | |
| 2dtstatt | 0.003 | 4.523e-04 | (2.70+/-0.01)e2 | 0.07 +/- 0.32 | K | DETECTOR HOUSING TEMP 1 | |
| 2fhtrmzt | 0.006 | 0.001 | (2.65+/-0.03)e2 | -1.01 +/- 0.91 | K | FRONT END ELECTRONICS BOX TEMPERATURE | |
| 2fradpyt | 0.005 | 0.001 | (2.63+/-0.03)e2 | -1.18 +/- 0.88 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP | |
| 2pmt1t | -0.003 | 6.786e-04 | (2.83+/-0.02)e2 | 0.12 +/- 0.42 | K | PMT 1 TEMPERATURE | |
| 2pmt2t | -0.002 | 6.911e-04 | (2.83+/-0.02)e2 | 0.21 +/- 0.43 | K | PMT 2 TEMPERATURE | |
| 2uvlspxt | -6.398e-04 | 4.948e-04 | (2.75+/-0.01)e2 | 0.36 +/- 0.36 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP | |
- HRC HK
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2fe00atm | -3.621e-04 | 0.006 | -1.20 +/- 3.15 | 0.56 +/- 0.12 | 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 | 3.976e-04 | 0.005 | -1.11 +/- 3.12 | 0.57 +/- 0.11 |
| 2imhvatm | on | 0.046 | 0.003 | 31.71 +/- 1.25 | -1.31 +/- 1.13 | C | Imaging det HVPS temperature | off | 0.008 | 0.003 | 16.31 +/- 1.64 | -0.02 +/- 0.12 |
| 2iminatm | on | 0.064 | 0.003 | 20.52 +/- 1.59 | -1.25 +/- 1.57 | C | Imaging det temperature | off | 0.002 | 0.001 | 1.29 +/- 0.67 | 0.27 +/- 0.06 |
| 2lvplatm | on | 0.036 | 0.003 | 28.00 +/- 1.17 | -1.19 +/- 1.10 | C | LVPS plate temperature | off | -0.003 | 0.003 | 10.20 +/- 1.51 | 0.14 +/- 0.09 |
| 2prbscr | on | 0.001 | 1.075e-04 | 1.76 +/- 0.05 | -0.03 +/- 0.05 | AMP | Primary bus current | off | 7.708e-06 | 2.818e-05 | 1.71 +/- 0.02 | (8.30+/-152.50)e-5 |
| 2prbsvl | 9.826e-04 | 2.024e-04 | 26.76 +/- 0.12 | -0.04 +/- 0.01 | 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 | -3.541e-15 | 999.000 | 5.66 +/- 0.00 | (2.67+/-1.54)e-14 |
| 2sphvatm | on | -0.002 | 0.003 | 31.48 +/- 1.19 | -0.02 +/- 1.24 | C | Spect det HVPS temperature | off | -0.018 | 0.003 | 16.55 +/- 1.78 | 0.31 +/- 0.08 |
| 2spinatm | on | 0.054 | 0.003 | 19.08 +/- 1.49 | -1.14 +/- 1.53 | C | Spect det temperature | off | -0.001 | 0.001 | 3.46 +/- 0.78 | 0.09 +/- 0.05 |
- PCAD Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| aacccdpt | 5.140e-05 | 7.863e-04 | (2.65+/-0.02)e2 | 0.47 +/- 0.47 | K | AC CCD TEMP (PRI) | |
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| aacccdrt | 1.529e-04 | 8.473e-04 | (3.09+/-0.02)e2 | 0.57 +/- 0.51 | K | AC CCD TEMP (RDNT) | |
| aach1t | 2.078e-04 | 8.645e-04 | (3.06+/-0.02)e2 | 0.46 +/- 0.52 | K | AC HOUSING TEMP (ACH1) | |
| aach2t | 2.692e-04 | 8.665e-04 | (3.06+/-0.02)e2 | 0.54 +/- 0.52 | 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
