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_sep19 6004901 9.140 14.181 0.0 5915 I2 node 0 262654 10.640430 4.258921 0.0 74.0 I2 node 1 262654 11.248765 13.175150 0.0 5915.0 I2 node 2 262654 11.111011 4.248832 0.0 135.0 I2 node 3 262654 10.996599 8.351019 0.0 3562.0 I3 node 0 262654 11.831042 10.978855 0.0 5064.0 I3 node 1 262654 11.370318 4.279319 0.0 160.0 I3 node 2 262654 11.162695 4.175299 0.0 118.0 I3 node 3 262654 11.458954 4.591011 0.0 675.0 S2 node 0 262654 8.471389 6.810225 0.0 1892.0 S2 node 1 262654 8.906271 4.803269 0.0 277.0 S2 node 2 262654 10.092352 10.154422 0.0 3740.0 S2 node 3 262654 10.362788 9.424019 0.0 608.0 S3 node 0 262654 18.949996 22.789403 0.0 208.0 S3 node 1 262654 18.017383 21.242482 0.0 2668.0 S3 node 2 262654 15.033892 9.139823 0.0 414.0 S3 node 3 262654 12.934905 6.506254 0.0 75.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2333.331 3017.041 0.0 130555 I2 node 0 262654 2022.179936 402.600304 429.0 11673.0 I2 node 1 262654 2127.838183 565.399922 445.0 98841.0 I2 node 2 262654 2156.745861 456.609693 448.0 11852.0 I2 node 3 262654 2161.888699 558.017761 431.0 28609.0 I3 node 0 262654 2301.217520 567.399119 423.0 9502.0 I3 node 1 262654 2382.692671 1702.961284 450.0 55398.0 I3 node 2 262654 2104.473131 391.607140 429.0 12108.0 I3 node 3 262654 2096.243017 421.160559 383.0 32548.0 S2 node 0 262654 2716.584038 430.569441 1514.0 21929.0 S2 node 1 262654 2879.689212 645.134210 1679.0 15800.0 S2 node 2 262654 3185.010907 652.922630 2111.0 27818.0 S2 node 3 262654 3137.532693 510.825962 1867.0 60131.0 S3 node 0 262654 4813.292842 2310.839459 2109.0 33654.0 S3 node 1 262654 6035.352292 2286.404280 0.0 29859.0 S3 node 2 262654 4787.928121 1278.838852 2060.0 25686.0 S3 node 3 262654 3699.979159 675.811126 2269.0 25161.0
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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
Sep 2019 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.11 | +/- 2.68 C |
| Mean Width: | |
| 0.79 | +/- 0.32 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 |
ACIS Rejected Events
The links below are plots of stat1 quantities, showing on-board rejected events. The average EVTSENT, DROP_AMP, DROP_POS, DROP_GRD, THR_PIX, and maximum BERR_SUM obtained from L1 acis*stat1.fits files are plotted for each observation. CTI observations are plotted separately from regular science observations.
Column definitions:
- EVTSENT - number of events sent in data record
- DROP_AMP - number of discarded events due to corrected amplitude
- DROP_POS - number of discarded events due to CCD position
- DROP_GRD - number of discarded events due to grade code
- THR_PIX - number of pixels above respective threshold level
- BERR_SUM - number of pixel bias errors so far in science run
Note the half-life decline of the CTI source is clearly evidenced in the steady janline of EVTSENT.
CCD3 Observations
| CTI | Science |
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CCD7 Observations
| CTI | Science |
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ACIS Gain Trends
We computed ACIS gain and offset from ACIS event1 files used in CTI computation, following the step described by C. Grant ACIS gain @ -120C page.
Instead computing gains and offsets from individual observations, we combined all data from each month and computed an monthly averaged gain and offset.
The following plots show CCD3 and CCD5 gains and offset trends.
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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_09_2019.fits 16777216 0.058 0.272 0.000 26.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_09_2019.fits 16777216 5.965 5.838 0.000 303.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_09_2019.fits 16777216 0.009 0.158 0.000 35.000
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IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_09_2019.fits 16777216 18.247 33.415 0.000 1745.000
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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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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 Sep 2019
Sun Spot History
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Trending
Critical Trends
| ACIS Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1pdeaat | 303.378 | 7.398 | 0.002+/-0.003 | -0.053+/-0.833 | K | PSMC DEA POWER SUPPLY TEMP A |
| 1pin1at | 340.813 | 11.255 | 0.016+/-0.017 | 0.309+/-1.223 | K | PSMC TEMP 1A |
| HRMA Computed Averages - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| obaavg | 296.439 | 1.905 | -0.012+/-0.002 | -15.686+/-9.139 | TEMP | OBA/TFTE |
| EPHIN Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| teio | 315.281 | 26.341 | -0.015+/-0.012 | -1.158+/-1.498 | K | EPHIN ELECTRONICS HOUSING TEMP |
| tephin | 327.455 | 7.184 | -0.010+/-0.003 | -0.532+/-0.584 | K | EPHIN SENSOR HOUSING TEMP |
| S/C Main Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| tcylfmzm | 308.158 | 20.734 | -0.003+/-0.010 | -0.890+/-1.860 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 |
| tcylfmzp | 310.196 | 18.896 | 0.004+/-0.009 | -0.993+/-1.747 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-2 |
| S/C Ancillary Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| tfssbkt1 | 334.284 | 28.477 | -0.004+/-0.014 | -0.971+/-1.532 | K | FSS BRACKET-1 TEMP (+Y) |
| tfssbkt2 | 330.738 | 32.806 | (2.75+/-158.30)e-4 | -1.096+/-1.713 | K | FSS BRACKET-2 TEMP (-Y) |
| tsctsf1 | 312.050 | 3.895 | -0.002+/-0.002 | 0.239+/-0.351 | K | SC-TS FITTING -1 TEMP |
| tsctsf6 | 311.989 | 4.006 | -0.002+/-0.002 | 0.542+/-0.408 | K | SC-TS FITTING -6 TEMP |
| MUPS - Daily Maximums | ||||||
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| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| pm1thv1t | 346.666 | 12.614 | -0.008+/-0.006 | -0.949+/-0.786 | K | MUPS 1 THRUSTER VALVE 01 TEMP |
| pline02t | 327.214 | 12.201 | -0.007+/-0.005 | -0.776+/-0.885 | K | PROP LINE TEMP 02 |
| pline03t | 322.572 | 15.513 | -0.003+/-0.007 | -0.745+/-1.158 | K | PROP LINE TEMP 03 |
| pline04t | 308.055 | 11.944 | -0.008+/-0.005 | -0.299+/-1.005 | K | PROP LINE TEMP 04 |
Quarterly Trends
- PCAD FTS Temperature and Gradient
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| ohrthr27 | 297.191 | 0.012 | (-1.97+/-0.51)e-5 | (-8.39+/-92.12)e-5 | K | RT 20 : PERISCOPE |
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| ohrthr42 | 295.925 | 0.329 | (-5.33+/-1.41)e-4 | -0.137+/-0.048 | K | RT 133: PERISCOPE |
| ohrthr43 | 296.126 | 0.375 | (-5.67+/-1.61)e-4 | -0.150+/-0.052 | K | RT 134: PERISCOPE |
| oobagrd3 | -0.275 | 0.077 | (-1.62+/-3.37)e-5 | 0.013+/-0.008 | K | RT 505 TO RT 504: PERISCOPE GRADIENT MONITOR |
| oobagrd6 | 0.102 | 0.008 | (-1.04+/-0.33)e-5 | -0.003+/-0.001 | K | RT 507 TO RT 506: PERISCOPE GRADIENT MONITOR |
- SIM Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3btu_bpt | 268.948 | 7.285 | 0.002+/-0.003 | -1.395+/-0.860 | K | BTU BASEPLATE (+X) |
|---|---|---|---|---|---|---|
| 3tsmxcet | 244.838 | 41.424 | -0.006+/-0.020 | 1.684+/-2.298 | K | -X TURTLE SHELL |
| 3tsmxspt | 469.759 | 199.927 | -0.012+/-0.096 | 5.124+/-11.832 | K | -X TURTLE SHELL |
- SIIM Electronics
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| agrndadc | -6.233e-05 | 1.729e-04 | (-1.33+/-1.14)e-7 | (-4.97+/-106.50)e-7 | --- | agrndadc |
|---|---|---|---|---|---|---|
| fatabadc | 4.993 | 0.070 | (-1.81+/-1.78)e-6 | 0.003+/-0.003 | V | FA Tab Position Sensor A/D Converter |
| n15vadc | -15.016 | 0.000 | (5.09+/-3.37)e-7 | (2.43+/-3.87)e-5 | V | -15V Power Supply A/D Converter Reading |
| p15vadc | 14.963 | 0.001 | (-1.28+/-0.37)e-6 | (7.04+/-5.53)e-5 | V | +15V Power Supply A/D Converter Reading |
| p5vadc | 4.985 | 0.025 | (-2.40+/-1.79)e-5 | 0.005+/-0.002 | V | +5V Power Supply A/D Converter Reading |
| tsctabadc | 4.979 | 0.155 | (-1.78+/-6.18)e-5 | 0.001+/-0.006 | V | TSC Tab Position Sensor A/D converter |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
