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_jun23 6004901 4.839 10.002 0.0 357 I2 node 0 262654 2.864420 1.882347 0.0 37.0 I2 node 1 262654 3.025677 2.021565 0.0 142.0 I2 node 2 262654 3.061969 1.974845 0.0 42.0 I2 node 3 262654 3.143374 2.164871 0.0 200.0 I3 node 0 262654 3.440453 2.292769 0.0 49.0 I3 node 1 262654 3.223719 2.111350 0.0 119.0 I3 node 2 262654 3.157150 1.987402 0.0 34.0 I3 node 3 262654 3.036460 2.011627 0.0 284.0 S2 node 0 262654 5.466789 4.827673 0.0 48.0 S2 node 1 262654 6.320950 6.628639 0.0 153.0 S2 node 2 262654 9.502788 13.620249 0.0 178.0 S2 node 3 262654 10.810296 14.985759 0.0 231.0 S3 node 0 262654 12.946963 21.100340 0.0 357.0 S3 node 1 262654 12.172051 17.852574 0.0 251.0 S3 node 2 262654 12.051892 17.785201 0.0 233.0 S3 node 3 262654 9.936037 12.700780 0.0 141.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2643.835 3370.135 0.0 148219 I2 node 0 262654 2295.793328 464.296167 490.0 14403.0 I2 node 1 262654 2417.858436 668.204347 504.0 146213.0 I2 node 2 262654 2446.341396 518.088197 527.0 15388.0 I2 node 3 262654 2451.482958 634.065028 488.0 31860.0 I3 node 0 262654 2637.569169 649.319553 491.0 14360.0 I3 node 1 262654 2719.323122 1746.520691 516.0 55937.0 I3 node 2 262654 2431.043744 454.152538 487.0 14645.0 I3 node 3 262654 2411.717363 489.083919 457.0 35411.0 S2 node 0 262654 3081.719727 499.831759 1672.0 22490.0 S2 node 1 262654 3268.788745 743.341133 1854.0 17635.0 S2 node 2 262654 3618.796086 745.112344 2266.0 31710.0 S2 node 3 262654 3581.886439 601.996164 1997.0 77904.0 S3 node 0 262654 5472.006955 2974.428806 2405.0 54692.0 S3 node 1 262654 6686.688535 2381.692768 0.0 62613.0 S3 node 2 262654 5416.012791 1361.830922 2511.0 27408.0 S3 node 3 262654 4238.736298 764.257738 2566.0 26570.0
Mar 2023 | Dec 2022 | Sep 2022 | Jun 2022 |
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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 2023 Focal Temperature
The Mean (max) FPT: | |
---|---|
-109.6 | +/- 6.14 C |
Mean Width: | |
0.6 | +/- 0.24 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_2023.fits 16777216 0.123 0.411 0.000 15.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_06_2023.fits 16777216 na na na na
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_06_2023.fits 16777216 0.021 0.200 0.000 17.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_06_2023.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 2023 | Dec 2022 | Sep 2022 | Jun 2022 |
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Mar 2023 | Dec 2022 | Sep 2022 | Jun 2022 |
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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 2023
Sun Spot History (See:NOAA Page)
Trending
Critical Trends
ACIS Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
1pdeaat | -0.009 | 0.002 | (2.99+/-0.05)e2 | 3.07 +/- 1.28 | K | PSMC DEA PS A TEMP |
HRMA Computed Averages - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
obaavg | -0.024 | 0.001 | (2.99+/-0.03)e2 | -0.59 +/- 0.68 | TEMP | OBA/TFTE |
EPHIN Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
teio | -6.598e-04 | 0.010 | (3.29+/-0.23)e2 | 0.10 +/- 3.84 | K | EPHIN ELECTRONICS HOUSING TEMP | |
tephin | -0.039 | 0.003 | (3.39+/-0.08)e2 | 0.48 +/- 2.28 | K | EPHIN SENSOR HOUSING TEMP |
S/C Main Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
tcylfmzm | 0.020 | 0.005 | (3.13+/-0.12)e2 | 5.44 +/- 2.00 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 | |
tcylfmzp | 0.017 | 0.005 | (3.16+/-0.11)e2 | 5.53 +/- 1.89 | 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 | -0.016 | 0.012 | (3.50+/-0.29)e2 | 5.09 +/- 4.46 | K | FSS BRAC | |
tfssbkt2 | -0.010 | 0.013 | (3.44+/-0.30)e2 | 4.34 +/- 4.49 | K | FSS BRAC | |
tsctsf1 | -0.040 | 0.002 | (3.24+/-0.05)e2 | 2.90 +/- 1.39 | K | SC-TS FITTING -1 TEMP | |
tsctsf6 | -0.041 | 0.002 | (3.24+/-0.05)e2 | 1.22 +/- 1.45 | K | SC-TS FITTING -6 TEMP |
MUPS - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
pm1thv1t | -0.038 | 0.007 | (3.52+/-0.16)e2 | -2.64 +/- 2.99 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
pm2thv1t | -0.074 | 0.021 | (3.19+/-0.50)e2 | -5.43 +/- 8.54 | K | MUPS 2 THRUSTER VALVE 01 TEMP | |
pm1thv2t | -0.046 | 0.007 | (3.54+/-0.16)e2 | -3.56 +/- 3.17 | K | MUPS 1 THRUSTER VALVE 02 TEMP | |
pm2thv2t | -0.116 | 0.023 | (3.18+/-0.54)e2 | -7.43 +/- 8.98 | K | MUPS 2 THRUSTER VALVE 02 TEMP | |
pline02t | -0.029 | 0.006 | (3.36+/-0.13)e2 | -1.57 +/- 2.72 | K | PROP LINE TEMP 02 | |
pline03t | -0.017 | 0.006 | (3.29+/-0.14)e2 | -0.90 +/- 2.44 | K | PROP LINE TEMP 03 | |
pline04t | -0.023 | 0.005 | (3.18+/-0.12)e2 | -1.84 +/- 2.50 | K | PROP LINE TEMP 04 |
Quarterly Trends
- HRMA Struts
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt584t | -0.019 | 8.719e-04 | (3.03+/-0.02)e2 | -0.61 +/- 0.45 | K | RT 584 - STRUT TEMP | |
---|---|---|---|---|---|---|---|
4rt585t | -0.019 | 8.737e-04 | (3.03+/-0.02)e2 | -0.63 +/- 0.45 | K | RT 585 - STRUT TEMP | |
4rt586t | -0.017 | 7.844e-04 | (2.98+/-0.02)e2 | -0.66 +/- 0.37 | K | RT 586 - STRUT TEMP | |
4rt587t | -0.015 | 6.785e-04 | (2.92+/-0.02)e2 | -0.41 +/- 0.28 | K | RT 587 - STRUT TEMP | |
4rt597t | -0.025 | 0.002 | (3.11+/-0.04)e2 | -0.18 +/- 0.91 | K | RT 597 - TFTE TEMP | |
4rt598t | -0.024 | 0.002 | (3.10+/-0.04)e2 | -0.32 +/- 0.90 | K | RT 598 - TFTE TEMP |
- OB Forward Bulkhead
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt705t | -0.022 | 0.001 | (2.93+/-0.03)e2 | -0.65 +/- 0.56 | K | RT 705 - OB BUL | |
---|---|---|---|---|---|---|---|
4rt706t | -0.022 | 0.001 | (2.92+/-0.03)e2 | -0.56 +/- 0.57 | K | RT 706 - OB BUL | |
4rt707t | -0.023 | 0.001 | (2.95+/-0.03)e2 | -0.46 +/- 0.56 | K | RT 707 - OB BULKHEAD TEMP | |
4rt708t | -0.023 | 0.001 | (3.00+/-0.03)e2 | -0.53 +/- 0.61 | K | RT 708 - OB BULKHEAD TEMP | |
4rt709t | -0.025 | 0.001 | (3.02+/-0.03)e2 | -0.48 +/- 0.66 | K | RT 709 - OB BULKHEAD TEMP | |
4rt710t | -0.026 | 0.001 | (3.03+/-0.03)e2 | -0.55 +/- 0.70 | K | RT 710 - OB BULKHEAD TEMP |
- HRMA Thermal
- HRMA Thermal
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt568t | -0.021 | 0.001 | (3.01+/-0.03)e2 | -0.66 +/- 0.60 | K | RT 568 - HRMA TEMP | |
---|---|---|---|---|---|---|---|
4rt569t | -0.010 | 3.715e-04 | (2.97+/-0.01)e2 | -0.35 +/- 0.14 | K | RT 569 - HRMA TEMP | |
4rt570t | -0.006 | 2.189e-04 | (2.96+/-0.01)e2 | -0.25 +/- 0.07 | K | RT 570 - HRMA TEMP | |
4rt575t | -0.024 | 0.001 | (3.06+/-0.03)e2 | -0.83 +/- 0.75 | K | RT 575 - OB CONE TEMP | |
4rt576t | -0.022 | 0.001 | (2.96+/-0.03)e2 | -1.09 +/- 0.60 | K | RT 576 - OB CONE TEMP | |
4rt578t | -0.026 | 0.002 | (3.04+/-0.04)e2 | -1.23 +/- 0.96 | 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