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_nov22 6004901 5.954 7.303 0.0 516 I2 node 0 262654 5.796810 2.884088 0.0 64.0 I2 node 1 262654 6.434151 3.195188 0.0 94.0 I2 node 2 262654 6.441349 3.096277 0.0 86.0 I2 node 3 262654 5.916243 3.048028 0.0 369.0 I3 node 0 262654 7.160765 3.408201 0.0 97.0 I3 node 1 262654 7.128761 3.317934 0.0 126.0 I3 node 2 262654 6.932582 3.115585 0.0 80.0 I3 node 3 262654 6.829780 3.166711 0.0 159.0 S2 node 0 262654 7.483835 3.417654 0.0 95.0 S2 node 1 262654 8.315009 4.022580 0.0 291.0 S2 node 2 262654 9.327390 5.577954 0.0 348.0 S2 node 3 262654 8.732876 5.475799 0.0 516.0 S3 node 0 262654 9.637680 5.869230 0.0 98.0 S3 node 1 262654 10.500420 4.844609 0.0 472.0 S3 node 2 262654 10.953837 5.443202 0.0 68.0 S3 node 3 262654 10.037333 5.978915 0.0 86.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2606.105 3332.533 0.0 143021 I2 node 0 262654 2265.992459 457.042255 484.0 13961.0 I2 node 1 262654 2385.839542 653.490252 499.0 138606.0 I2 node 2 262654 2414.620085 510.939521 521.0 14697.0 I2 node 3 262654 2419.129147 624.182491 487.0 28906.0 I3 node 0 262654 2599.566858 638.640372 485.0 14046.0 I3 node 1 262654 2680.777608 1742.455736 512.0 55891.0 I3 node 2 262654 2394.423469 449.451389 483.0 14320.0 I3 node 3 262654 2378.203133 481.642554 453.0 35118.0 S2 node 0 262654 3033.804006 492.529256 1644.0 22419.0 S2 node 1 262654 3217.078315 731.390814 1830.0 17365.0 S2 node 2 262654 3559.643149 733.213453 2244.0 30734.0 S2 node 3 262654 3520.779584 588.872569 1977.0 74511.0 S3 node 0 262654 5389.660566 2945.250334 2364.0 54383.0 S3 node 1 262654 6595.750743 2366.819480 0.0 49400.0 S3 node 2 262654 5327.470921 1343.501976 2457.0 27319.0 S3 node 3 262654 4176.771728 761.459319 2519.0 26506.0
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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
Nov 2022 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -108.43 | +/- 6.42 C |
| Mean Width: | |
| 0.01 | +/- 4.31 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 |
The following three plots show trends of SIB from year 2000. CCDs shown here are CCD3, CCD5, and CCD7. Fitted lines are linear fit after eliminating extreme outliers. For >10 keV plots, 2 lines are fit. One is with a 13 keV filter, and another without.
CCD 3
CCD 5
CCD 7
ACIS Histogram Mode Trends
We collected data from acis histogram mode data, and created trend plots of peak portions and peak widths against time (DOM). The peaks were estimated by fitting a simple Gaussian on three peaks (Al, Ti, and Mn), and the widths were estimated by a width at the half max from the peak.
All histogram data are taken under TIMED and GRADED_HIST mode, SIM position is at an external calibration source position, the focal temperature is around -119.7 C, and parameter settings in aciselec, acistemp are set to about same for all.
CCD 3, Peak Position
CCD 3, Peak Widths
CCD 3, Count Rates
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_11_2022.fits 16777216 na na na na
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_11_2022.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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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 Nov 2022
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRMA Heater
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| ohrthr03 | 2.530e-04 | 4.416e-05 | (2.95+/-0.00)e2 | -0.08 +/- 0.01 | K | RT 5: HRMA FORWARD APERTURE PLATE | |
|---|---|---|---|---|---|---|---|
| ohrthr09 | -1.082e-04 | 1.809e-04 | (2.96+/-0.00)e2 | -0.42 +/- 0.06 | K | RT 105: HRMA CAP | |
| ohrthr17 | -4.468e-04 | 2.277e-04 | (2.96+/-0.01)e2 | -0.52 +/- 0.07 | K | RT 125: HSA OUTER CYNLINDER | |
| ohrthr24 | -1.822e-05 | 3.409e-04 | (2.97+/-0.01)e2 | -0.93 +/- 0.17 | K | RT 12: HRMA AFT HEATER PLATE | |
| ohrthr38 | -2.318e-04 | 8.967e-04 | (3.01+/-0.02)e2 | -1.47 +/- 0.56 | K | RT 120: HRMA AFT COLLIMATOR OUTER CYLINDER | |
| ohrthr52 | -2.789e-04 | 1.885e-04 | (2.96+/-0.00)e2 | -0.44 +/- 0.07 | K | RT 100: HRMA CAP | |
- HRMA Thermal
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 4rt568t | 7.219e-04 | 9.624e-04 | (3.00+/-0.02)e2 | -1.95 +/- 0.61 | K | RT 568 - HRMA TEMP | |
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| 4rt569t | 2.187e-04 | 3.028e-04 | (2.97+/-0.01)e2 | -0.82 +/- 0.14 | K | RT 569 - HRMA TEMP | |
| 4rt570t | -6.076e-06 | 1.661e-04 | (2.96+/-0.00)e2 | -0.34 +/- 0.07 | K | RT 570 - HRMA TEMP | |
| 4rt575t | 7.980e-04 | 0.001 | (3.05+/-0.03)e2 | -1.77 +/- 0.76 | K | RT 575 - OB CONE TEMP | |
| 4rt576t | -0.002 | 9.671e-04 | (2.96+/-0.02)e2 | -2.05 +/- 0.61 | K | RT 576 - OB CONE TEMP | |
| 4rt578t | 0.006 | 0.002 | (3.03+/-0.04)e2 | -3.57 +/- 0.99 | K | RT 578 - OB CONE TEMP | |
- MUPS
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| pm1thv1t | 0.036 | 0.006 | (3.54+/-0.13)e2 | -1.80 +/- 2.49 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
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| pline02t | 0.043 | 0.005 | (3.37+/-0.12)e2 | -1.84 +/- 2.77 | K | PROP LINE TEMP 02 | |
| pline03t | 0.042 | 0.006 | (3.32+/-0.14)e2 | -0.32 +/- 2.78 | K | PROP LINE TEMP 03 | |
| pline04t | 0.043 | 0.005 | (3.19+/-0.11)e2 | -7.90 +/- 2.97 | K | PROP LINE TEMP 04 | |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
