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_jun20 6004901 8.958 14.472 0.0 4677 I2 node 0 262654 8.319024 3.615813 0.0 73.0 I2 node 1 262654 8.588560 11.771623 0.0 4492.0 I2 node 2 262654 8.569430 3.599356 0.0 93.0 I2 node 3 262654 8.526225 6.713867 0.0 2547.0 I3 node 0 262654 9.360835 6.578238 0.0 2526.0 I3 node 1 262654 9.007855 3.773473 0.0 144.0 I3 node 2 262654 9.002295 3.686602 0.0 95.0 I3 node 3 262654 8.988239 3.751780 0.0 169.0 S2 node 0 262654 8.688205 5.122066 0.0 452.0 S2 node 1 262654 8.930019 6.061393 0.0 772.0 S2 node 2 262654 10.241697 8.121579 0.0 2499.0 S2 node 3 262654 13.639981 12.471771 0.0 4677.0 S3 node 0 262654 26.648545 36.053175 1.0 919.0 S3 node 1 262654 22.622269 19.156612 0.0 525.0 S3 node 2 262654 15.492896 5.669703 0.0 155.0 S3 node 3 262654 13.587473 5.005135 0.0 183.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2405.730 3100.308 0.0 134365 I2 node 0 262654 2086.724938 416.728736 442.0 12226.0 I2 node 1 262654 2194.847416 588.084521 454.0 109384.0 I2 node 2 262654 2222.573072 470.003354 468.0 12569.0 I2 node 3 262654 2227.964725 574.683866 447.0 28694.0 I3 node 0 262654 2379.614447 585.662432 447.0 11507.0 I3 node 1 262654 2458.136589 1708.805048 475.0 55487.0 I3 node 2 262654 2179.042265 406.150859 440.0 12709.0 I3 node 3 262654 2171.699112 437.114531 408.0 33290.0 S2 node 0 262654 2806.061106 446.419523 1544.0 22089.0 S2 node 1 262654 2973.693507 666.811935 1723.0 16262.0 S2 node 2 262654 3285.382567 667.597966 2147.0 27904.0 S2 node 3 262654 3241.974850 527.185836 1905.0 64296.0 S3 node 0 262654 4962.754883 2366.516388 2172.0 35142.0 S3 node 1 262654 6187.620678 2315.655266 0.0 33592.0 S3 node 2 262654 4923.010018 1291.643848 2164.0 25878.0 S3 node 3 262654 3819.268328 680.969152 2339.0 25289.0
Mar 2020 | Dec 2019 | Sep 2019 | Jun 2019 |
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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
Jun 2020 Focal Temperature
The Mean (max) FPT: | |
---|---|
-109.61 | +/- 5.0 C |
Mean Width: | |
0.88 | +/- 0.2 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_06_2020.fits 16777216 0.012 0.113 0.000 10.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_06_2020.fits 16777216 6.437 6.037 0.000 306.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_06_2020.fits 16777216 0.004 0.065 0.000 3.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_06_2020.fits 16777216 19.027 34.214 0.000 1750.000
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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Mar 2020 | Dec 2019 | Sep 2019 | Jun 2019 |
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Mar 2020 | Dec 2019 | Sep 2019 | Jun 2019 |
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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
ACIS | ||||
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HRCI | ||||
HRCI |
Fid Light Drift
Fid light positions on ACA drift with time. The drift trends of Fid light 2 with ACIS-I and ACIS-S configurations are shown below.
The top panel shows Fid light 2 drift in ACENT I (app. along with -Y axis), and the
bottom panel shows that in ACENT J (app. along with Z axis). The unit is a pixel, and
one pixel is approximately 0.5 arcsec. The slope listed at the top right corner is
the change in a position per year (arcsec/yr). The vertical line on DOM = 1411 (Jun 1, 2003)
indicates a transition date of use of IRU-1 to IRU-2.
See also Tom Aldcroft's updated page:
https://cxc.cfa.harvard.edu/mta/ASPECT/fid_drift
Fid 2 (ACIS-I)
Fid 2 (ACIS-S)
Fid 8 (HRC-I)
Fid 12 (HRC-S)
Gyro Bias Drift
Radiation History
Radiation Count Rates of Jun 2020
Sun Spot History (See:NOAA Page)
Trending
Critical Trends
ACIS Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
1pdeaat | -0.033 | 0.003 | (3.04+/-0.07)e2 | -2.04 +/- 2.48 | K | PSMC DEA PS A TEMP |
HRMA Computed Averages - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
obaavg | -0.242 | 0.138 | (2.98+/-0.02)e2 | -46.00 +/- 93.39 | TEMP | OBA/TFTE |
EPHIN Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
teio | -0.010 | 0.011 | (3.20+/-0.24)e2 | 4.41 +/- 5.89 | K | EPHIN ELECTRONICS HOUSING TEMP | |
tephin | -0.006 | 0.003 | (3.29+/-0.07)e2 | -0.87 +/- 2.52 | K | EPHIN SENSOR HOUSING TEMP |
S/C Main Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
tcylfmzm | -0.071 | 0.008 | (3.15+/-0.18)e2 | 2.62 +/- 5.43 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 | |
tcylfmzp | -0.058 | 0.007 | (3.16+/-0.17)e2 | 2.31 +/- 4.95 | 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 | -0.034 | 0.012 | (3.39+/-0.28)e2 | 2.63 +/- 6.06 | K | FSS BRAC | |
tfssbkt2 | -0.023 | 0.014 | (3.35+/-0.32)e2 | 2.84 +/- 6.88 | K | FSS BRAC | |
tsctsf1 | 0.001 | 0.002 | (3.15+/-0.04)e2 | 0.18 +/- 1.50 | K | SC-TS FITTING -1 TEMP | |
tsctsf6 | -0.007 | 0.002 | (3.15+/-0.04)e2 | -0.91 +/- 1.47 | K | SC-TS FITTING -6 TEMP |
MUPS - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
pm1thv1t | -0.017 | 0.006 | (3.49+/-0.15)e2 | 1.47 +/- 3.32 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
pm2thv1t | -0.005 | 0.014 | (3.33+/-0.32)e2 | -5.20 +/- 7.16 | K | MUPS 2 THRUSTER VALVE 01 TEMP | |
pm1thv2t | -0.013 | 0.006 | (3.51+/-0.14)e2 | -0.69 +/- 3.13 | K | MUPS 1 THRUSTER VALVE 02 TEMP | |
pm2thv2t | 0.015 | 0.019 | (3.20+/-0.43)e2 | 7.16 +/- 11.12 | K | MUPS 2 THRUSTER VALVE 02 TEMP | |
pline02t | -0.017 | 0.005 | (3.30+/-0.12)e2 | 1.71 +/- 3.34 | K | PROP LINE TEMP 02 | |
pline03t | -0.030 | 0.007 | (3.26+/-0.15)e2 | 5.23 +/- 3.71 | K | PROP LINE TEMP 03 | |
pline04t | -0.014 | 0.005 | (3.12+/-0.11)e2 | 2.20 +/- 3.38 | K | PROP LINE TEMP 04 |
Quarterly Trends
- HRMA Struts
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt584t | 0.004 | 4.390e-04 | (3.01+/-0.01)e2 | -0.45 +/- 0.33 | K | RT 584 - STRUT TEMP | |
---|---|---|---|---|---|---|---|
4rt585t | 0.005 | 4.271e-04 | (3.01+/-0.01)e2 | -0.17 +/- 0.32 | K | RT 585 - STRUT TEMP | |
4rt586t | 0.004 | 3.492e-04 | (2.98+/-0.01)e2 | -0.26 +/- 0.26 | K | RT 586 - STRUT TEMP | |
4rt587t | 0.003 | 2.652e-04 | (2.93+/-0.01)e2 | -0.16 +/- 0.19 | K | RT 587 - STRUT TEMP | |
4rt597t | 0.009 | 0.001 | (3.07+/-0.02)e2 | -1.00 +/- 0.81 | K | RT 597 - TFTE TEMP | |
4rt598t | 0.010 | 0.001 | (3.07+/-0.02)e2 | -0.58 +/- 0.82 | K | RT 598 - TFTE TEMP |
- OB Forward Bulkhead
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt705t | 0.004 | 5.323e-04 | (2.93+/-0.01)e2 | -0.69 +/- 0.43 | K | RT 705 - OB BUL | |
---|---|---|---|---|---|---|---|
4rt706t | 0.004 | 5.355e-04 | (2.92+/-0.01)e2 | -0.73 +/- 0.44 | K | RT 706 - OB BUL | |
4rt707t | 0.004 | 5.257e-04 | (2.96+/-0.01)e2 | -0.80 +/- 0.43 | K | RT 707 - OB BULKHEAD TEMP | |
4rt708t | 0.005 | 5.851e-04 | (3.00+/-0.01)e2 | -0.85 +/- 0.48 | K | RT 708 - OB BULKHEAD TEMP | |
4rt709t | 0.006 | 6.418e-04 | (3.00+/-0.02)e2 | -0.92 +/- 0.52 | K | RT 709 - OB BULKHEAD TEMP | |
4rt710t | 0.007 | 6.965e-04 | (3.02+/-0.02)e2 | -0.97 +/- 0.57 | K | RT 710 - OB BULKHEAD TEMP |
- HRMA Thermal
- HRMA Thermal
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt568t | 0.005 | 5.899e-04 | (2.99+/-0.01)e2 | -0.46 +/- 0.46 | K | RT 568 - HRMA TEMP | |
---|---|---|---|---|---|---|---|
4rt569t | 0.002 | 1.611e-04 | (2.97+/-0.00)e2 | -0.14 +/- 0.10 | K | RT 569 - HRMA TEMP | |
4rt570t | 0.001 | 7.893e-05 | (2.96+/-0.00)e2 | 0.03 +/- 0.04 | K | RT 570 - HRMA TEMP | |
4rt575t | 0.007 | 7.803e-04 | (3.04+/-0.02)e2 | -0.82 +/- 0.61 | K | RT 575 - OB CONE TEMP | |
4rt576t | 0.005 | 5.892e-04 | (2.95+/-0.01)e2 | -0.30 +/- 0.46 | K | RT 576 - OB CONE TEMP | |
4rt578t | 0.007 | 0.001 | (3.02+/-0.03)e2 | -0.19 +/- 0.88 | K | RT 578 - OB CONE TEMP |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations