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_dec23 6004901 3.758 5.026 0.0 2531 I2 node 0 262654 2.797315 1.875569 0.0 43.0 I2 node 1 262654 2.919777 2.209946 0.0 524.0 I2 node 2 262654 2.934033 1.953982 0.0 65.0 I2 node 3 262654 2.921120 1.996373 0.0 202.0 I3 node 0 262654 3.719830 2.873591 0.0 83.0 I3 node 1 262654 3.356986 7.391102 0.0 2214.0 I3 node 2 262654 3.178936 1.995119 0.0 61.0 I3 node 3 262654 3.227786 3.699294 0.0 1584.0 S2 node 0 262654 5.036068 5.815524 0.0 2531.0 S2 node 1 262654 5.237636 2.875946 0.0 285.0 S2 node 2 262654 5.775900 3.673958 0.0 974.0 S2 node 3 262654 6.696969 4.087477 0.0 629.0 S3 node 0 262654 8.933644 5.970094 0.0 110.0 S3 node 1 262654 8.961239 4.104274 0.0 65.0 S3 node 2 262654 7.709095 2.939874 0.0 38.0 S3 node 3 262654 6.831186 2.750823 0.0 42.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2670.286 3394.423 0.0 154687 I2 node 0 262654 2317.746900 469.335616 494.0 14728.0 I2 node 1 262654 2441.841227 679.233161 505.0 152681.0 I2 node 2 262654 2470.176645 523.556654 532.0 15874.0 I2 node 3 262654 2474.705048 640.363146 493.0 32435.0 I3 node 0 262654 2664.327373 656.653085 496.0 14509.0 I3 node 1 262654 2746.116740 1749.359310 518.0 55971.0 I3 node 2 262654 2456.413032 459.709808 490.0 14864.0 I3 node 3 262654 2436.331844 494.562299 460.0 35615.0 S2 node 0 262654 3113.838791 502.690407 1685.0 22531.0 S2 node 1 262654 3305.616040 751.953695 1866.0 18066.0 S2 node 2 262654 3664.954871 756.004398 2280.0 32271.0 S2 node 3 262654 3623.200762 610.899903 2005.0 80023.0 S3 node 0 262654 5520.080354 2990.824704 2420.0 54838.0 S3 node 1 262654 6737.577124 2385.036773 0.0 69061.0 S3 node 2 262654 5471.254626 1361.872243 2541.0 27477.0 S3 node 3 262654 4291.775194 768.985348 2589.0 26623.0
Sep 2023 | Jun 2023 | Mar 2023 | Dec 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
Dec 2023 Focal Temperature
The Mean (max) FPT: | |
---|---|
-107.53 | +/- 7.69 C |
Mean Width: | |
0.8 | +/- 0.58 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_12_2023.fits 16777216 0.047 0.222 0.000 11.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_12_2023.fits 16777216 na na na na
No Data
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_12_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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Sep 2023 | Jun 2023 | Mar 2023 | Dec 2022 |
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Sep 2023 | Jun 2023 | Mar 2023 | Dec 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 Dec 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 | 0.001 | 0.002 | (2.99+/-0.04)e2 | 1.24 +/- 1.33 | K | PSMC DEA PS A TEMP |
HRMA Computed Averages - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
obaavg | -0.014 | 0.001 | (2.98+/-0.02)e2 | -1.27 +/- 0.65 | TEMP | OBA/TFTE |
EPHIN Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
teio | 0.026 | 0.009 | (3.30+/-0.22)e2 | 2.97 +/- 3.64 | K | EPHIN ELECTRONICS HOUSING TEMP | |
tephin | 0.008 | 0.003 | (3.39+/-0.08)e2 | 2.15 +/- 2.13 | K | EPHIN SENSOR HOUSING TEMP |
S/C Main Temperatures - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
tcylfmzm | 0.020 | 0.004 | (3.13+/-0.10)e2 | 1.24 +/- 1.91 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 | |
tcylfmzp | 0.020 | 0.004 | (3.16+/-0.09)e2 | 1.12 +/- 1.75 | 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 | 0.015 | 0.012 | (3.50+/-0.29)e2 | 3.75 +/- 4.12 | K | FSS BRAC | |
tfssbkt2 | 0.017 | 0.013 | (3.45+/-0.29)e2 | 3.80 +/- 4.17 | K | FSS BRAC | |
tsctsf1 | 0.004 | 0.002 | (3.24+/-0.05)e2 | 0.53 +/- 1.31 | K | SC-TS FITTING -1 TEMP | |
tsctsf6 | 0.003 | 0.002 | (3.24+/-0.05)e2 | 0.36 +/- 1.36 | K | SC-TS FITTING -6 TEMP |
MUPS - Daily Maximums | |||||||
---|---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
pm1thv1t | 0.016 | 0.007 | (3.52+/-0.16)e2 | -1.18 +/- 2.51 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
pm2thv1t | 0.063 | 0.022 | (3.18+/-0.51)e2 | 0.41 +/- 7.55 | K | MUPS 2 THRUSTER VALVE 01 TEMP | |
pm1thv2t | 0.015 | 0.007 | (3.54+/-0.16)e2 | -0.79 +/- 2.65 | K | MUPS 1 THRUSTER VALVE 02 TEMP | |
pm2thv2t | 0.059 | 0.023 | (3.16+/-0.55)e2 | 1.27 +/- 8.00 | K | MUPS 2 THRUSTER VALVE 02 TEMP | |
pline02t | 0.023 | 0.005 | (3.36+/-0.12)e2 | 0.78 +/- 2.28 | K | PROP LINE TEMP 02 | |
pline03t | 0.025 | 0.006 | (3.29+/-0.14)e2 | 0.57 +/- 2.15 | K | PROP LINE TEMP 03 | |
pline04t | 0.023 | 0.005 | (3.17+/-0.11)e2 | 2.82 +/- 2.29 | K | PROP LINE TEMP 04 |
Quarterly Trends
- HRMA Struts
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt584t | 0.005 | 7.523e-04 | (3.02+/-0.02)e2 | 1.21 +/- 0.40 | K | RT 584 - STRUT TEMP | |
---|---|---|---|---|---|---|---|
4rt585t | 0.005 | 7.450e-04 | (3.03+/-0.02)e2 | 1.26 +/- 0.39 | K | RT 585 - STRUT TEMP | |
4rt586t | 0.004 | 6.409e-04 | (2.98+/-0.02)e2 | 1.13 +/- 0.33 | K | RT 586 - STRUT TEMP | |
4rt587t | 0.003 | 4.826e-04 | (2.92+/-0.01)e2 | 0.85 +/- 0.24 | K | RT 587 - STRUT TEMP | |
4rt597t | 0.010 | 0.001 | (3.11+/-0.03)e2 | 1.76 +/- 0.82 | K | RT 597 - TFTE TEMP | |
4rt598t | 0.010 | 0.001 | (3.10+/-0.03)e2 | 1.46 +/- 0.82 | K | RT 598 - TFTE TEMP |
- OB Forward Bulkhead
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt705t | 0.007 | 8.594e-04 | (2.93+/-0.02)e2 | 0.79 +/- 0.50 | K | RT 705 - OB BUL | |
---|---|---|---|---|---|---|---|
4rt706t | 0.007 | 8.687e-04 | (2.92+/-0.02)e2 | 0.84 +/- 0.51 | K | RT 706 - OB BUL | |
4rt707t | 0.007 | 8.628e-04 | (2.94+/-0.02)e2 | 0.67 +/- 0.51 | K | RT 707 - OB BULKHEAD TEMP | |
4rt708t | 0.008 | 9.395e-04 | (3.00+/-0.02)e2 | 0.78 +/- 0.55 | K | RT 708 - OB BULKHEAD TEMP | |
4rt709t | 0.008 | 0.001 | (3.01+/-0.02)e2 | 0.71 +/- 0.59 | K | RT 709 - OB BULKHEAD TEMP | |
4rt710t | 0.009 | 0.001 | (3.03+/-0.03)e2 | 0.81 +/- 0.63 | K | RT 710 - OB BULKHEAD TEMP |
- HRMA Thermal
- HRMA Thermal
Previous Quarter | |||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
4rt568t | 0.006 | 9.319e-04 | (3.00+/-0.02)e2 | 1.26 +/- 0.53 | K | RT 568 - HRMA TEMP | |
---|---|---|---|---|---|---|---|
4rt569t | 0.002 | 2.987e-04 | (2.97+/-0.01)e2 | 0.64 +/- 0.12 | K | RT 569 - HRMA TEMP | |
4rt570t | 0.001 | 1.639e-04 | (2.96+/-0.00)e2 | 0.31 +/- 0.06 | K | RT 570 - HRMA TEMP | |
4rt575t | 0.008 | 0.001 | (3.06+/-0.03)e2 | 1.55 +/- 0.67 | K | RT 575 - OB CONE TEMP | |
4rt576t | 0.007 | 9.279e-04 | (2.96+/-0.02)e2 | 1.40 +/- 0.53 | K | RT 576 - OB CONE TEMP | |
4rt578t | 0.009 | 0.002 | (3.04+/-0.04)e2 | 1.66 +/- 0.87 | 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