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_jun22 6004901 7.029 11.238 0.0 3828 I2 node 0 262654 7.002519 3.240552 0.0 73.0 I2 node 1 262654 7.465812 6.496832 0.0 2785.0 I2 node 2 262654 8.063536 7.006701 0.0 288.0 I2 node 3 262654 8.538234 13.040895 0.0 1839.0 I3 node 0 262654 7.202408 7.038865 0.0 3168.0 I3 node 1 262654 7.316968 3.689007 0.0 138.0 I3 node 2 262654 6.977868 3.152394 0.0 60.0 I3 node 3 262654 7.437313 8.667792 0.0 3760.0 S2 node 0 262654 7.106353 7.605181 0.0 2518.0 S2 node 1 262654 7.838819 5.312921 0.0 190.0 S2 node 2 262654 10.576651 16.355635 0.0 3828.0 S2 node 3 262654 12.192879 16.509346 0.0 2434.0 S3 node 0 262654 13.549728 15.744950 0.0 260.0 S3 node 1 262654 13.814861 12.392184 0.0 380.0 S3 node 2 262654 13.051222 14.941213 0.0 165.0 S3 node 3 262654 11.085967 11.783555 0.0 140.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2574.802 3300.156 0.0 141807 I2 node 0 262654 2231.005959 449.238354 477.0 13621.0 I2 node 1 262654 2347.435770 642.044606 493.0 134793.0 I2 node 2 262654 2376.556935 502.906376 512.0 14219.0 I2 node 3 262654 2382.317616 614.782185 482.0 28874.0 I3 node 0 262654 2559.821343 630.187870 479.0 13798.0 I3 node 1 262654 2640.988904 1736.622683 508.0 55832.0 I3 node 2 262654 2355.003619 442.564399 478.0 14040.0 I3 node 3 262654 2340.272253 473.127820 446.0 34843.0 S2 node 0 262654 2999.324789 486.143505 1625.0 22368.0 S2 node 1 262654 3179.669511 722.089026 1810.0 17193.0 S2 node 2 262654 3517.861278 724.472212 2230.0 30143.0 S2 node 3 262654 3480.694204 579.694324 1964.0 72487.0 S3 node 0 262654 5339.769750 2920.601345 2338.0 53924.0 S3 node 1 262654 6540.923409 2362.813719 0.0 45915.0 S3 node 2 262654 5271.001965 1339.694739 2421.0 27221.0 S3 node 3 262654 4127.254645 755.773854 2488.0 26447.0
Mar 2022 | Dec 2021 | Sep 2021 | Jun 2021 |
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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 2022 Focal Temperature
The Mean (max) FPT: | |
---|---|
-109.5 | +/- 5.96 C |
Mean Width: | |
0.66 | +/- 0.27 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.
No Data
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_06_2022.fits 16777216 na na na na
No Data
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_06_2022.fits 16777216 na na na na
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 2022 | Dec 2021 | Sep 2021 | Jun 2021 |
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Mar 2022 | Dec 2021 | Sep 2021 | Jun 2021 |
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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 2022
Sun Spot History (See:NOAA Page)
Trending
Critical Trends
ACIS Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
1pdeaat | 0.004 | 0.003 | (3.02+/-0.06)e2 | -0.40 +/- 1.80 | K | PSMC DEA PS A TEMP |
HRMA Computed Averages - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
obaavg | -0.015 | 9.958e-04 | (2.99+/-0.02)e2 | 0.78 +/- 0.74 | TEMP | OBA/TFTE |
EPHIN Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
teio | -0.002 | 0.010 | (3.26+/-0.23)e2 | -1.98 +/- 4.31 | K | EPHIN ELECTRONICS HOUSING TEMP | |
tephin | -0.038 | 0.004 | (3.35+/-0.09)e2 | -3.50 +/- 3.11 | K | EPHIN SENSOR HOUSING TEMP |
S/C Main Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
tcylfmzm | 0.027 | 0.006 | (3.15+/-0.13)e2 | -1.78 +/- 2.49 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 | |
tcylfmzp | 0.015 | 0.005 | (3.18+/-0.12)e2 | -1.55 +/- 2.22 | 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 | -0.006 | 0.013 | (3.46+/-0.28)e2 | -1.43 +/- 4.80 | K | FSS BRAC | |
tfssbkt2 | -0.002 | 0.013 | (3.41+/-0.30)e2 | -2.41 +/- 4.87 | K | FSS BRAC | |
tsctsf1 | -0.036 | 0.002 | (3.21+/-0.05)e2 | 2.56 +/- 1.88 | K | SC-TS FITTING -1 TEMP | |
tsctsf6 | -0.018 | 0.002 | (3.20+/-0.05)e2 | 1.85 +/- 1.93 | K | SC-TS FITTING -6 TEMP |
MUPS - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
pm1thv1t | -0.046 | 0.007 | (3.52+/-0.16)e2 | 2.29 +/- 3.16 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
pm2thv1t | -0.066 | 0.021 | (3.21+/-0.48)e2 | -5.79 +/- 8.31 | K | MUPS 2 THRUSTER VALVE 01 TEMP | |
pm1thv2t | -0.052 | 0.007 | (3.53+/-0.17)e2 | 3.94 +/- 3.44 | K | MUPS 1 THRUSTER VALVE 02 TEMP | |
pm2thv2t | -0.017 | 0.024 | (3.13+/-0.56)e2 | -0.46 +/- 10.36 | K | MUPS 2 THRUSTER VALVE 02 TEMP | |
pline02t | -0.032 | 0.006 | (3.34+/-0.13)e2 | 4.22 +/- 3.00 | K | PROP LINE TEMP 02 | |
pline03t | -0.010 | 0.007 | (3.29+/-0.15)e2 | 0.69 +/- 2.82 | K | PROP LINE TEMP 03 | |
pline04t | -0.028 | 0.005 | (3.17+/-0.11)e2 | -0.91 +/- 2.86 | K | PROP LINE TEMP 04 |
Quarterly Trends
- HRMA Struts
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt584t | -0.011 | 6.578e-04 | (3.01+/-0.02)e2 | 0.92 +/- 0.50 | K | RT 584 - STRUT TEMP | |
---|---|---|---|---|---|---|---|
4rt585t | -0.013 | 6.491e-04 | (3.02+/-0.02)e2 | 0.80 +/- 0.49 | K | RT 585 - STRUT TEMP | |
4rt586t | -0.012 | 5.387e-04 | (2.98+/-0.01)e2 | 0.76 +/- 0.40 | K | RT 586 - STRUT TEMP | |
4rt587t | -0.007 | 3.882e-04 | (2.92+/-0.01)e2 | 0.58 +/- 0.28 | K | RT 587 - STRUT TEMP | |
4rt597t | -0.017 | 0.001 | (3.09+/-0.03)e2 | 1.21 +/- 1.13 | K | RT 597 - TFTE TEMP | |
4rt598t | -0.020 | 0.001 | (3.08+/-0.03)e2 | 1.01 +/- 1.11 | K | RT 598 - TFTE TEMP |
- OB Forward Bulkhead
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt705t | -0.011 | 7.664e-04 | (2.93+/-0.02)e2 | 0.74 +/- 0.60 | K | RT 705 - OB BUL | |
---|---|---|---|---|---|---|---|
4rt706t | -0.011 | 7.666e-04 | (2.91+/-0.02)e2 | 0.88 +/- 0.60 | K | RT 706 - OB BUL | |
4rt707t | -0.012 | 7.685e-04 | (2.94+/-0.02)e2 | 0.87 +/- 0.61 | K | RT 707 - OB BULKHEAD TEMP | |
4rt708t | -0.014 | 8.588e-04 | (2.99+/-0.02)e2 | 0.96 +/- 0.69 | K | RT 708 - OB BULKHEAD TEMP | |
4rt709t | -0.015 | 9.269e-04 | (3.00+/-0.02)e2 | 0.92 +/- 0.74 | K | RT 709 - OB BULKHEAD TEMP | |
4rt710t | -0.017 | 9.941e-04 | (3.02+/-0.02)e2 | 1.08 +/- 0.80 | K | RT 710 - OB BULKHEAD TEMP |
- HRMA Thermal
- HRMA Thermal
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt568t | -0.013 | 8.327e-04 | (2.99+/-0.02)e2 | 0.92 +/- 0.65 | K | RT 568 - HRMA TEMP | |
---|---|---|---|---|---|---|---|
4rt569t | -0.005 | 2.414e-04 | (2.97+/-0.01)e2 | 0.17 +/- 0.14 | K | RT 569 - HRMA TEMP | |
4rt570t | -0.003 | 1.231e-04 | (2.96+/-0.00)e2 | 0.06 +/- 0.06 | K | RT 570 - HRMA TEMP | |
4rt575t | -0.015 | 0.001 | (3.04+/-0.03)e2 | 1.14 +/- 0.87 | K | RT 575 - OB CONE TEMP | |
4rt576t | -0.012 | 8.338e-04 | (2.95+/-0.02)e2 | 0.89 +/- 0.66 | K | RT 576 - OB CONE TEMP | |
4rt578t | -0.018 | 0.001 | (3.02+/-0.03)e2 | 0.38 +/- 1.06 | 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