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_dec18 6004901 7.875 10.617 0.0 4679 I2 node 0 262654 7.761272 3.458578 0.0 56.0 I2 node 1 262654 8.186900 4.019247 0.0 655.0 I2 node 2 262654 7.986599 3.449917 0.0 79.0 I2 node 3 262654 7.939331 6.978403 0.0 3045.0 I3 node 0 262654 9.288638 3.935512 0.0 149.0 I3 node 1 262654 9.267723 5.331989 0.0 1131.0 I3 node 2 262654 8.764599 3.623963 0.0 89.0 I3 node 3 262654 8.781449 3.713485 0.0 169.0 S2 node 0 262654 10.684306 4.135646 0.0 83.0 S2 node 1 262654 10.865375 4.599764 0.0 106.0 S2 node 2 262654 11.153722 6.669172 0.0 2499.0 S2 node 3 262654 10.890345 10.321305 0.0 4679.0 S3 node 0 262654 12.503412 6.050756 0.0 122.0 S3 node 1 262654 14.160854 5.331114 0.0 112.0 S3 node 2 262654 13.779776 4.767281 0.0 164.0 S3 node 3 262654 12.331602 4.113823 0.0 42.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2258.458 2921.927 0.0 126825 I2 node 0 262654 1953.396217 387.254908 417.0 11117.0 I2 node 1 262654 2055.584094 539.881870 431.0 85566.0 I2 node 2 262654 2086.121935 442.019572 430.0 11053.0 I2 node 3 262654 2091.441113 540.444468 419.0 28522.0 I3 node 0 262654 2215.849338 548.089205 412.0 8792.0 I3 node 1 262654 2297.301897 1680.453211 435.0 55106.0 I3 node 2 262654 2023.953022 375.473683 410.0 11468.0 I3 node 3 262654 2014.824417 403.705265 366.0 31674.0 S2 node 0 262654 2627.584521 411.469017 1488.0 21820.0 S2 node 1 262654 2785.915426 621.630028 1630.0 15337.0 S2 node 2 262654 3080.546641 630.148396 2077.0 27729.0 S2 node 3 262654 3030.195512 480.996356 1835.0 56474.0 S3 node 0 262654 4654.555078 2095.123080 2050.0 27153.0 S3 node 1 262654 5880.492254 2237.603919 0.0 28992.0 S3 node 2 262654 4643.171274 1231.963801 1986.0 25061.0 S3 node 3 262654 3585.945876 650.244465 2197.0 24632.0
Sep 2018 | Jun 2018 | Mar 2018 | Dec 2017 |
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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 2018 Focal Temperature
The Mean (max) FPT: | |
---|---|
-113.56 | +/- 1.81 C |
Mean Width: | |
0.78 | +/- 0.36 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_2018.fits 16777216 0.015 0.132 0.000 17.000
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_12_2018.fits 16777216 5.601 5.725 0.000 302.000
No Data
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_12_2018.fits 16777216 17.945 32.735 0.000 1730.000
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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Sep 2018 | Jun 2018 | Mar 2018 | Dec 2017 |
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Sep 2018 | Jun 2018 | Mar 2018 | Dec 2017 |
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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
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 2018
Sun Spot History
Trending
Critical Trends
ACIS Temperatures - Daily Maximums | ||||||
---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
1pdeaat | 304.458 | 6.909 | 0.011+/-0.001 | -0.653+/-0.101 | K | PSMC DEA POWER SUPPLY TEMP A |
1pin1at | 338.776 | 11.697 | -0.043+/-0.002 | -2.283+/-0.130 | K | PSMC TEMP 1A |
HRMA Computed Averages - Daily Maximums | ||||||
---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
obaavg | 295.943 | 2.057 | 0.006+/-0.000 | 0.235+/-0.018 | TEMP | OBA/TFTE |
EPHIN Temperatures - Daily Maximums | ||||||
---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
teio | 324.730 | 24.239 | -0.073+/-0.002 | 2.544+/-0.470 | K | EPHIN ELECTRONICS HOUSING TEMP |
tephin | 333.318 | 7.195 | -0.035+/-0.001 | -0.342+/-0.146 | K | EPHIN SENSOR HOUSING TEMP |
S/C Main Temperatures - Daily Maximums | ||||||
---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
tcylfmzm | 306.947 | 19.984 | 0.006+/-0.002 | 4.808+/-0.447 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 |
tcylfmzp | 308.844 | 18.498 | 0.007+/-0.002 | 4.606+/-0.418 | 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 | 338.211 | 23.077 | -0.022+/-0.002 | 0.449+/-0.389 | K | FSS BRACKET-1 TEMP (+Y) |
tfssbkt2 | 332.207 | 29.106 | -0.032+/-0.003 | 2.101+/-0.492 | K | FSS BRACKET-2 TEMP (-Y) |
tsctsf1 | 312.250 | 3.849 | (-4.98+/-32.74)e-5 | -0.561+/-0.099 | K | SC-TS FITTING -1 TEMP |
tsctsf6 | 312.434 | 3.992 | -0.004+/-0.000 | -0.737+/-0.115 | K | SC-TS FITTING -6 TEMP |
MUPS - Daily Maximums | ||||||
---|---|---|---|---|---|---|
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
pm1thv1t | 346.899 | 9.024 | 0.002+/-0.001 | -0.154+/-0.153 | K | MUPS 1 THRUSTER VALVE 01 TEMP |
pline02t | 328.047 | 9.775 | -0.003+/-0.001 | 0.962+/-0.215 | K | PROP LINE TEMP 02 |
pline03t | 323.680 | 12.659 | -0.003+/-0.001 | 1.921+/-0.254 | K | PROP LINE TEMP 03 |
pline04t | 308.951 | 10.941 | -0.002+/-0.001 | 2.802+/-0.267 | K | PROP LINE TEMP 04 |
Quarterly Trends
- HRMA Struts
Previous Quarter | ||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
4rt584t | 298.301 | 1.365 | 0.005+/-0.000 | -0.458+/-0.069 | K | RT 584 - HRMA STRUT TEMP |
---|---|---|---|---|---|---|
4rt585t | 298.593 | 1.366 | 0.006+/-0.000 | -0.485+/-0.067 | K | RT 585 - HRMA STRUT TEMP |
4rt586t | 295.284 | 1.403 | 0.008+/-0.000 | -0.557+/-0.063 | K | RT 586 - HRMA STRUT TEMP |
4rt587t | 290.268 | 1.451 | 0.010+/-0.000 | -0.697+/-0.054 | K | RT 587 - HRMA STRUT TEMP |
4rt597t | 303.883 | 2.476 | 0.006+/-0.000 | -0.920+/-0.082 | K | RT 597 - TFTE AFT CYLINDER TEMP |
4rt598t | 303.179 | 2.458 | 0.006+/-0.000 | -0.897+/-0.081 | K | RT 598 - TFTE AFT CYLINDER TEMP |
- OB Forward Bulkhead
Previous Quarter | ||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
4rt705t | 289.864 | 1.597 | 0.008+/-0.000 | -0.669+/-0.064 | K | RT 705 - OB FWD BULKHEAD TEMP |
---|---|---|---|---|---|---|
4rt706t | 288.479 | 1.669 | 0.008+/-0.000 | -0.721+/-0.063 | K | RT 706 - OB FWD BULKHEAD TEMP |
4rt707t | 291.563 | 2.262 | 0.015+/-0.000 | -1.207+/-0.070 | K | RT 707 - OB FWD BULKHEAD TEMP |
4rt708t | 295.925 | 1.970 | 0.011+/-0.000 | -0.968+/-0.070 | K | RT 708 - OB FWD BULKHEAD TEMP |
4rt709t | 297.052 | 1.904 | 0.009+/-0.000 | -0.836+/-0.074 | K | RT 709 - OB FWD BULKHEAD TEMP |
4rt710t | 298.414 | 1.935 | 0.008+/-0.000 | -0.820+/-0.075 | K | RT 710 - OB FWD BULKHEAD TEMP |
- HRMA Thermal
- HRMA Thermal
Previous Quarter | ||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
4rt568t | 296.318 | 1.708 | 0.007+/-0.000 | -0.561+/-0.069 | K | RT 568 - HRMA AHS INNER CYLINDER |
---|---|---|---|---|---|---|
4rt569t | 295.279 | 0.628 | 0.003+/-0.000 | -0.176+/-0.034 | K | RT 569 - PERISCOPE (FIRST FOLD END) |
4rt570t | 294.940 | 0.391 | 0.002+/-0.000 | -0.067+/-0.023 | K | RT 570 - HRMA RRCA |
4rt575t | 300.373 | 2.029 | 0.007+/-0.000 | -0.759+/-0.077 | K | RT 575 - OB FWD CONE TEMP |
4rt576t | 292.259 | 1.702 | 0.008+/-0.000 | -0.641+/-0.069 | K | RT 576 - OB FWD CONE TEMP |
4rt578t | 298.670 | 2.768 | 0.006+/-0.000 | -0.357+/-0.092 | K | RT 578 - OB MID CONE TEMP |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations