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.
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Note: Counts and RMS's of Cumulative maps are lower than the previous months.
This is because we excluded extreme outliers.
Please check more detail plots at Telemetered Photon Dose Trend page.
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Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_may11 6004901 7.051 9.722 0.0 476 I2 node 0 262654 7.903633 3.436512 0.0 62.0 I2 node 1 262654 8.494133 4.085756 0.0 460.0 I2 node 2 262654 8.202488 3.462649 0.0 85.0 I2 node 3 262654 8.231046 3.742742 0.0 49.0 I3 node 0 262654 7.940019 3.456535 0.0 40.0 I3 node 1 262654 8.587460 8.197651 0.0 195.0 I3 node 2 262654 7.724373 3.275843 0.0 53.0 I3 node 3 262654 7.746681 3.342906 0.0 125.0 S2 node 0 262654 8.836366 3.658247 0.0 238.0 S2 node 1 262654 9.081143 4.069054 0.0 64.0 S2 node 2 262654 9.426137 4.234699 0.0 214.0 S2 node 3 262654 8.889845 3.576657 0.0 423.0 S3 node 0 262654 11.485218 7.438222 0.0 293.0 S3 node 1 262654 12.653820 4.906043 0.0 111.0 S3 node 2 262654 12.127807 3.767985 0.0 55.0 S3 node 3 262654 11.183711 3.646455 0.0 35.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1518.92 2042.17 0.0 91919 I2 node 0 262654 1248.239021 240.257962 0.0 6177.0 I2 node 1 262654 1317.436981 321.842852 0.0 25538.0 I2 node 2 262654 1352.561997 293.374732 0.0 8829.0 I2 node 3 262654 1348.170755 344.347822 0.0 27635.0 I3 node 0 262654 1414.261781 346.142539 0.0 6379.0 I3 node 1 262654 1483.294544 1114.415336 0.0 28702.0 I3 node 2 262654 1287.716936 233.116521 0.0 6047.0 I3 node 3 262654 1274.180962 248.598881 0.0 22860.0 S2 node 0 262654 1816.752053 251.950849 932.0 20102.0 S2 node 1 262654 1932.141196 413.904431 967.0 10602.0 S2 node 2 262654 2142.221584 403.913849 1248.0 15184.0 S2 node 3 262654 2068.777642 297.099651 1203.0 32107.0 S3 node 0 262654 3143.716107 1598.554999 1287.0 12916.0 S3 node 1 262654 4351.200556 1936.916772 0.0 13410.0 S3 node 2 262654 3286.220232 898.273941 1231.0 8252.0 S3 node 3 262654 2522.353237 404.703406 1387.0 9284.0
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| Mar 2011 | Dec 2010 | Sep 2010 | Jun 2010 |
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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
Focal Plane Temperature
Jun 2011 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -115.27 | +/- 4.25 C |
| Mean Width: | |
| 0.80 | +/- 0.57 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)
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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.
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_06_2011.fits 16777216 0.060 0.079 0.0 10.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_06_2011.fits 16777216 3.543 4.380 0.0 292.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_06_2011.fits 16777216 0.105 0.369 0.0 16.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_06_2011.fits 16777216 13.700 22.794 0.0 1624.0
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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 2011 | Dec 2010 | Sep 2010 | Jun 2010 |
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Gratings
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 Focus pages. (NOTE: the figures are not updated from Mar 2009 due to a system problem.)
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 Zone Timing
Plotted below are radiation zone timing plots based on the following definitions of radiation zone:
- RADZONE - Ephin levels (in any of the E1300,P4GM,P41GM channels) are more than 1/3 of RADMON safing thresholds.
- RADMON - Radmon is disabled for radiation zone (as commanded based on OFLS model, for comparison with actual radiation levels).
- PERIGEE - Time of closest earth approach (for comparison)
Radiation Count Rates of Jun 2011
Sun Spot History
Trending
Critical Trends
| ACIS Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1PDEAAT | 306.99 | 8.03 | -6.452e-01 | 1.329e+00 | K | PSMC DEA PS A TEMP |
| 1PIN1AT | 293.01 | 7.16 | -4.577e-01 | 1.362e+00 | K | PSMC TEMP 1A |
| HRMA Computed Averages - Daily Maximums | ||||||
| OBAAVG | 284.84 | 1.05 | 3.026e-01 | 1.744e-02 | K | OBA/TFTE TEMP |
| EPHIN Temperatures - Daily Maximums | ||||||
| TEIO | 313.23 | 18.32 | 2.120e+00 | -5.755e-01 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 310.80 | 8.26 | 2.656e+00 | -2.504e-01 | K | EPHIN SENSOR HOUSING TEMP |
| S/C Main Temperatures - Daily Maximums | ||||||
| TCYLFMZM | 297.33 | 23.21 | 7.010e-01 | -1.439e+00 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 |
| TCYLFMZP | 299.99 | 22.13 | 6.359e-01 | -1.229e+00 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-2 |
| S/C Ancillary Temperatures - Daily Maximums | ||||||
| TFSSBKT1 | 327.71 | 19.17 | 1.341e+00 | -3.030e+00 | K | FSS BRACKET-1 TEMP (+Y) |
| TFSSBKT2 | 323.45 | 24.05 | 8.063e-01 | -3.059e+00 | K | FSS BRACKET-2 TEMP (+Y) |
| TSCTSF1 | 290.06 | 4.12 | 9.744e-01 | -1.745e-01 | K | SC-TS FITTING -1 TEMP |
| TSCTSF6 | 289.87 | 4.66 | 1.133e+00 | -1.499e-01 | K | SC-TS FITTING -6 TEMP |
| MUPS - Daily Maximums | ||||||
| PM1THV1T | 330.71 | 9.47 | 1.563e+00 | -1.452e+00 | K | MUPS 1 THRUSTER VALVE 01 TEMP |
| PLINE02T | 309.69 | 10.83 | 1.787e+00 | -7.447e-01 | K | PROP LINE TEMP 02 |
| PLINE03T | 310.80 | 11.15 | 1.199e+00 | -7.457e-01 | K | PROP LINE TEMP 03 |
| PLINE04T | 298.60 | 10.06 | 3.666e-01 | -3.947e-01 | K | PROP LINE TEMP 04 |
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Quarterly Trends
- ACIS Thermal
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 205.42 | 1.93 | -2.391e+00 | -4.737e+01 | K | CAMERA BODY TEMP. A |
| 1CBBT | 205.91 | 1.88 | -3.132e+00 | -9.046e+01 | K | CAMERA BODY TEMP. B |
| 1CRAT | 146.73 | 1.99 | -9.924e-01 | -5.662e+01 | K | COLD RADIATOR TEMP. A |
| 1WRBT | 188.68 | 1.83 | -1.671e+00 | -9.628e+01 | K | WARM RADIATOR TEMP. B |
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- EPhin TV
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 5EIOT | 337.42 | 16.28 | -1.500e+01 | 3.318e+02 | K | EIO TEMP |
| 5EPHINT | 317.31 | 5.08 | -1.633e+01 | 1.375e+02 | K | EPHIN TEMP |
| HKEBOXTEMP | 321.72 | 5.28 | -1.665e+01 | 1.488e+02 | K | EPHIN HOUSEKEEPING EBOX: TEMPERATURE |
| TEPHIN | 316.97 | 5.45 | -1.646e+01 | 1.568e+02 | K | EPHIN SENSOR HOUSING TEMP |
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- ACA Thermal
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AACCCDRT | 296.75 | 0.87 | -1.564e+00 | 2.996e+01 | K | AC CCD TEMP (RDNT) |
| AACH1T | 293.84 | 0.86 | -1.440e+00 | 2.937e+01 | K | AC HOUSING TEMP (ACH1) |
| AACH2T | 293.88 | 0.86 | -1.442e+00 | 2.961e+01 | K | AC HOUSING TEMP (ACH2) |
| AAOTASMT | 292.95 | 0.83 | -1.494e+00 | 2.679e+01 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP |
| AAOTH2MT | 293.40 | 0.85 | -1.507e+00 | 2.794e+01 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA) |
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- SIM Thermal
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3FARALAT | 262.31 | 10.80 | 1.212e+01 | 1.220e-12 | K | FA STRUCTURE AT RAIL -Z, ABORT HEATER FA6 TEMP |
| PSUTEMP | 312.38 | 0.52 | 2.011e+00 | -9.320e-13 | (3FAPSAT) | SEA power supply temperature |
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Spacecraft Motions
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Reaction Wheel Rotations
Note: From Feb 2010, the computation of reaction wheel rotations are slightly modified.
Links to Past Monthly Reports
| Year | Month | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | Jul | Aug | Sep | Oct | Nov | Dec | ||||||
| 2000 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2001 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2002 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2003 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2004 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2005 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2006 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2007 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2008 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2009 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2010 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2011 | Jan | Feb | Mar | Apr | May | |||||||