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_aug19 6004901 9.987 45.979 0.0 12370 I2 node 0 262654 8.254915 3.592014 0.0 67.0 I2 node 1 262654 8.577560 6.918827 0.0 2911.0 I2 node 2 262654 8.373765 3.567924 0.0 117.0 I2 node 3 262654 8.448300 9.340644 0.0 2010.0 I3 node 0 262654 10.620310 4.405731 0.0 579.0 I3 node 1 262654 10.573680 4.412152 0.0 174.0 I3 node 2 262654 9.961440 3.935274 0.0 119.0 I3 node 3 262654 9.912021 4.096990 0.0 320.0 S2 node 0 262654 12.685915 32.698966 0.0 12370.0 S2 node 1 262654 13.377891 13.220599 0.0 645.0 S2 node 2 262654 15.282008 24.127258 0.0 3880.0 S2 node 3 262654 15.960632 26.722394 0.0 962.0 S3 node 0 262654 28.442743 199.068584 0.0 8765.0 S3 node 1 262654 17.229003 27.681915 0.0 4082.0 S3 node 2 262654 17.193176 29.622018 0.0 399.0 S3 node 3 262654 14.595378 21.556231 0.0 443.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2324.191 3006.163 0.0 130194 I2 node 0 262654 2011.539506 400.265881 427.0 11599.0 I2 node 1 262654 2116.589418 562.669685 442.0 98841.0 I2 node 2 262654 2145.634850 454.419923 446.0 11717.0 I2 node 3 262654 2150.892100 555.262682 428.0 28595.0 I3 node 0 262654 2289.386478 564.648412 422.0 9099.0 I3 node 1 262654 2371.322354 1702.168009 447.0 55379.0 I3 node 2 262654 2093.310436 389.473905 421.0 12002.0 I3 node 3 262654 2084.784063 418.694895 381.0 32428.0 S2 node 0 262654 2708.112649 429.070535 1512.0 21922.0 S2 node 1 262654 2870.782940 643.190426 1675.0 15744.0 S2 node 2 262654 3174.918555 651.531070 2109.0 27807.0 S2 node 3 262654 3127.169905 507.762382 1864.0 59783.0 S3 node 0 262654 4794.342846 2300.075265 2101.0 33516.0 S3 node 1 262654 6017.334909 2279.315051 0.0 29805.0 S3 node 2 262654 4772.894229 1276.712396 2053.0 25661.0 S3 node 3 262654 3687.044254 674.741577 2262.0 25152.0
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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 2019 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -111.69 | +/- 2.81 C |
| Mean Width: | |
| 0.89 | +/- 0.38 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_08_2019.fits 16777216 5.907 5.818 0.000 303.000
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_08_2019.fits 16777216 18.238 33.374 0.000 1737.000
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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 | |
|---|---|---|---|---|---|---|---|
| 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 Aug 2019
Sun Spot History
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 2ceahvpt | 300.051 | 2.195 | 0.001+/-0.001 | -0.298+/-0.344 | K | CEA RADIATOR TEMPERATURE AT CENTER |
|---|---|---|---|---|---|---|
| 2chtrpzt | 296.547 | 2.168 | (-3.63+/-12.02)e-4 | -0.177+/-0.340 | K | CENTRAL ELECTRONICS BOX TEMP |
| 2condmxt | 293.242 | 2.386 | (1.80+/-13.38)e-4 | 0.101+/-0.306 | K | CONDUIT -X FACE TEMPERATURE |
| 2dcentrt | 292.301 | 1.949 | (-5.12+/-109.30)e-5 | 0.053+/-0.341 | K | DETECTOR HOUSING TEMP 2 |
| 2dtstatt | 293.019 | 1.934 | (-1.15+/-10.86)e-4 | 0.239+/-0.339 | K | DETECTOR HOUSING TEMP 1 |
| 2fhtrmzt | 295.146 | 2.197 | (4.26+/-12.30)e-4 | 0.408+/-0.364 | K | FRONT END ELECTRONICS BOX TEMPERATURE |
| 2fradpyt | 290.902 | 2.316 | (3.95+/-12.83)e-4 | 0.432+/-0.367 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP |
| 2pmt1t | 294.385 | 2.661 | (9.33+/-14.75)e-4 | -0.117+/-0.383 | K | PMT 1 TEMPERATURE |
| 2pmt2t | 296.872 | 2.930 | 0.002+/-0.002 | -0.121+/-0.394 | K | PMT 2 TEMPERATURE |
| 2uvlspxt | 288.266 | 2.404 | (-3.13+/-13.54)e-4 | -0.116+/-0.384 | K | UV LIGHT SHIELD |
- PCAD Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| aacccdpt | 262.340 | 1.043 | -0.003+/-0.001 | -0.118+/-0.132 | K | AC CCD TEMP (PRI) |
|---|---|---|---|---|---|---|
| aacccdrt | 306.168 | 1.083 | -0.003+/-0.001 | -0.116+/-0.139 | K | AC CCD TEMP (RDNT) |
| aach1t | 303.494 | 1.075 | -0.003+/-0.001 | -0.122+/-0.136 | K | AC HOUSING TEMP (ACH1) |
| aach2t | 303.545 | 1.077 | -0.003+/-0.001 | -0.112+/-0.136 | 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
