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.
)
)
)
Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_aug21 6004901 6.245 8.361 0.0 1264 I2 node 0 262654 4.676729 2.528409 0.0 36.0 I2 node 1 262654 4.882762 2.813140 0.0 435.0 I2 node 2 262654 4.834271 2.700646 0.0 44.0 I2 node 3 262654 4.841565 2.710874 0.0 235.0 I3 node 0 262654 5.595999 2.856290 0.0 55.0 I3 node 1 262654 5.519799 3.002449 0.0 233.0 I3 node 2 262654 5.336509 2.662145 0.0 47.0 I3 node 3 262654 5.353917 2.724131 0.0 92.0 S2 node 0 262654 8.013951 3.288948 0.0 83.0 S2 node 1 262654 8.401152 3.853572 0.0 202.0 S2 node 2 262654 9.114468 4.671066 0.0 271.0 S2 node 3 262654 8.789079 4.518505 0.0 440.0 S3 node 0 262654 13.306464 12.073517 0.0 332.0 S3 node 1 262654 14.153408 8.098550 0.0 620.0 S3 node 2 262654 14.286041 7.640798 0.0 239.0 S3 node 3 262654 13.058536 7.107267 0.0 228.0
)
)
)
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2511.283 3232.404 0.0 138965 I2 node 0 262654 2168.365884 435.087146 464.0 12920.0 I2 node 1 262654 2280.320112 617.075344 478.0 121965.0 I2 node 2 262654 2306.654068 488.179721 494.0 13432.0 I2 node 3 262654 2312.268234 597.174219 470.0 28777.0 I3 node 0 262654 2484.202827 610.759599 460.0 13394.0 I3 node 1 262654 2561.524099 1723.494097 493.0 55662.0 I3 node 2 262654 2277.220359 425.959525 467.0 13489.0 I3 node 3 262654 2269.576428 458.207643 431.0 34221.0 S2 node 0 262654 2928.170029 474.039807 1597.0 22251.0 S2 node 1 262654 3104.868394 704.569168 1777.0 16839.0 S2 node 2 262654 3437.601796 710.964938 2196.0 28976.0 S2 node 3 262654 3400.060644 566.514134 1936.0 68987.0 S3 node 0 262654 5222.025280 2884.462685 2263.0 53283.0 S3 node 1 262654 6410.948148 2348.737917 0.0 38060.0 S3 node 2 262654 5150.838569 1336.457130 2315.0 27076.0 S3 node 3 262654 4022.837243 751.451981 2433.0 26328.0
)
|
)
|
)
|
)
|
| May 2021 | Feb 2021 | Nov 2020 | Aug 2020 |
|---|
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 2021 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -111.3 | +/- 5.03 C |
| Mean Width: | |
| -0.08 | +/- 4.74 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.
)
|
|---|
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_2021.fits 16777216 0.024 0.155 0.000 4.000
)
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_08_2021.fits 16777216 7.255 6.458 0.000 314.000
)
|
|---|
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_2021.fits 16777216 0.257 0.629 0.000 10.000
)
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_08_2021.fits 16777216 20.575 36.527 0.000 1766.000
|
|
Max dose trend plots corrected for events that "pile-up"
in the center of the taps due to bad position information.
|
)
|
)
|
)
|
)
|
| May 2021 | Feb 2021 | Nov 2020 | Aug 2020 |
|---|
)
|
)
|
)
|
)
|
| May 2021 | Feb 2021 | Nov 2020 | Aug 2020 |
|---|
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 |  |
 |
 |
 |
 |
 |
 |
| ACIS S |  |
 |
 |
 |
 |
 |
 |
| HRC I |  |
 |
 |
 |
 |
 |
 |
| HRC S |  |
 |
 |
 |
 |
 |
 |
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
| ACIS |
)
|
)
|
)
|
|
|---|---|---|---|---|
)
|
)
|
)
| ||
| HRCI |
)
|
)
|
)
|
)
|
| HRCI |
)
|
)
|
)
|
)
|
Gyro Bias Drift
Radiation History
Radiation Count Rates of Aug 2021
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRC Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2ceahvpt | 0.004 | 9.805e-04 | (3.00+/-0.02)e2 | -0.21 +/- 0.69 | K | CEA RADIATOR TEMPERATURE AT CENTER | |
|---|---|---|---|---|---|---|---|
| 2chtrpzt | 0.003 | 9.399e-04 | (2.96+/-0.02)e2 | -0.39 +/- 0.63 | K | CENTRAL ELECTRONICS BOX TEMP | |
| 2condmxt | 9.414e-04 | 0.001 | (2.93+/-0.02)e2 | 0.46 +/- 0.70 | K | CONDUIT -X FACE TEMPERATURE | |
| 2dcentrt | 0.001 | 8.813e-04 | (2.92+/-0.02)e2 | 0.24 +/- 0.64 | K | DETECTOR HOUSING TEMP 2 | |
| 2dtstatt | 3.413e-04 | 9.308e-04 | (2.93+/-0.02)e2 | 1.10 +/- 0.72 | K | DETECTOR HOUSING TEMP 1 | |
| 2fhtrmzt | -1.772e-04 | 0.001 | (2.95+/-0.02)e2 | 0.77 +/- 0.83 | K | FRONT END ELECTRONICS BOX TEMPERATURE | |
| 2fradpyt | -2.341e-04 | 0.001 | (2.91+/-0.02)e2 | 0.49 +/- 0.83 | K | FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP | |
| 2pmt1t | -6.262e-04 | 0.001 | (2.94+/-0.03)e2 | 0.38 +/- 0.79 | K | PMT 1 TEMPERATURE | |
| 2pmt2t | 3.029e-05 | 0.001 | (2.97+/-0.03)e2 | 0.29 +/- 0.90 | K | PMT 2 TEMPERATURE | |
| 2uvlspxt | 6.965e-04 | 9.309e-04 | (2.88+/-0.02)e2 | -0.29 +/- 0.65 | K | UV LIGHT SHIELD NEXT TO SNOUT TEMP | |
- HRC HK
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 2fe00atm | 1.393e-04 | 8.325e-04 | 22.21 +/- 1.92 | 0.70 +/- 0.64 | C | Front end temperature | |
|---|---|---|---|---|---|---|---|
| 2fepratm | on | 0.010 | 0.001 | 23.84 +/- 2.25 | 0.72 +/- 0.72 | C | FE temp card temperature | off | 0.021 | 0.003 | 24.60 +/- 1.82 | -46.68 +/- 55.27 |
| 2imhvatm | on | 0.014 | 0.001 | 31.50 +/- 1.86 | -0.18 +/- 0.53 | C | Imaging det HVPS temperature | off | 0.020 | 0.003 | 32.19 +/- 1.52 | (2.31+/-0.78)e2 |
| 2iminatm | on | 0.013 | 0.001 | 19.43 +/- 2.05 | 1.38 +/- 0.63 | C | Imaging det temperature | off | 0.017 | 0.003 | 20.28 +/- 1.68 | (4.58+/-0.27)e2 |
| 2lvplatm | on | 0.014 | 9.685e-04 | 27.66 +/- 1.74 | -0.06 +/- 0.49 | C | LVPS plate temperature | off | 0.013 | 0.003 | 28.34 +/- 1.54 | (5.30+/-0.44)e2 |
| 2prbscr | on | 7.327e-04 | 4.016e-05 | 1.71 +/- 0.07 | 0.01 +/- 0.02 | AMP | Primary bus current | off | 4.603e-05 | 1.343e-04 | 1.75 +/- 0.07 | 23.17 +/- 2.35 |
| 2prbsvl | 3.449e-04 | 5.854e-05 | 27.56 +/- 0.14 | -0.01 +/- 0.02 | V | Primary bus voltage | |
| 2smtratm | on | 2.245e-07 | 4.368e-07 | 5.94 +/- 0.00 | (1.93+/-5.58)e-5 | C | Selected motor temperature | off | -2.535e-06 | 1.275e-06 | 5.94 +/- 0.00 | (2.18+/-0.66)e-10 |
| 2sphvatm | on | 0.024 | 0.001 | 32.01 +/- 2.09 | 1.71 +/- 0.64 | C | Spect det HVPS temperature | off | -0.006 | 0.004 | 32.73 +/- 2.15 | (6.38+/-0.34)e2 |
| 2spinatm | on | 0.015 | 0.001 | 18.26 +/- 2.05 | 1.12 +/- 0.62 | C | Spect det temperature | off | 0.014 | 0.003 | 19.17 +/- 1.75 | (7.31+/-0.28)e2 |
- PCAD Temperature
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| aacccdpt | -6.798e-06 | 6.235e-04 | (2.63+/-0.01)e2 | 0.58 +/- 0.47 | K | AC CCD TEMP (PRI) | |
|---|---|---|---|---|---|---|---|
| aacccdrt | 1.261e-04 | 6.625e-04 | (3.07+/-0.02)e2 | 0.60 +/- 0.50 | K | AC CCD TEMP (RDNT) | |
| aach1t | -1.226e-05 | 6.555e-04 | (3.04+/-0.02)e2 | 0.60 +/- 0.49 | K | AC HOUSING TEMP (ACH1) | |
| aach2t | 3.140e-05 | 6.586e-04 | (3.04+/-0.02)e2 | 0.59 +/- 0.49 | 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
