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.
-
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.
Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_may11 6004901 7.25 9.65 0.0 459 I2 node 0 262654 7.310062 3.138602 0.0 70.0 I2 node 1 262654 7.707961 3.572538 0.0 368.0 I2 node 2 262654 7.570663 3.227086 0.0 66.0 I2 node 3 262654 7.640947 3.454227 0.0 224.0 I3 node 0 262654 7.107666 3.163893 0.0 42.0 I3 node 1 262654 7.573112 7.883562 0.0 201.0 I3 node 2 262654 6.933404 3.059217 0.0 53.0 I3 node 3 262654 6.982162 3.133624 0.0 95.0 S2 node 0 262654 8.553071 3.282895 0.0 88.0 S2 node 1 262654 9.325906 3.991278 0.0 66.0 S2 node 2 262654 10.785712 4.154916 0.0 157.0 S2 node 3 262654 10.250305 3.880440 0.0 459.0 S3 node 0 262654 11.632575 5.077668 0.0 89.0 S3 node 1 262654 12.891706 4.844209 0.0 72.0 S3 node 2 262654 13.816299 4.481496 0.0 43.0 S3 node 3 262654 13.028789 4.497403 0.0 40.0
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1511.87 2033.65 0.0 91471 I2 node 0 262654 1240.335388 238.446873 0.0 6115.0 I2 node 1 262654 1308.942848 319.185199 0.0 25078.0 I2 node 2 262654 1344.359508 291.630738 0.0 8822.0 I2 node 3 262654 1339.939709 342.170222 0.0 27626.0 I3 node 0 262654 1406.321762 344.365342 0.0 6355.0 I3 node 1 262654 1474.707085 1106.841261 0.0 28507.0 I3 node 2 262654 1279.992563 231.531199 0.0 6002.0 I3 node 3 262654 1266.434280 246.929410 0.0 22735.0 S2 node 0 262654 1807.915686 250.428711 928.0 20097.0 S2 node 1 262654 1923.060053 411.761688 964.0 10553.0 S2 node 2 262654 2132.795446 402.476065 1240.0 15069.0 S2 node 3 262654 2059.887798 296.933815 1197.0 31792.0 S3 node 0 262654 3132.230890 1597.727195 1281.0 12905.0 S3 node 1 262654 4338.546736 1936.480581 0.0 13405.0 S3 node 2 262654 3274.092425 898.417254 1217.0 8229.0 S3 node 3 262654 2511.169526 404.969498 1381.0 9265.0
Feb 2011 | Nov 2010 | Aug 2010 | May 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
May 2011 Focal Temperature
The Mean (max) FPT: | |
---|---|
-113.92 | +/- 4.86 C |
Mean Width: | |
0.77 | +/- 0.70 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 |
The following three plots show trends of SIB from year 2000. CCDs shown here are CCD3, CCD5, and CCD7. Fitted lines are linear fit after eliminating extreme outliers. For >10 keV plots, 2 lines are fit. One is with a 13 keV filter, and another without.
CCD 3
CCD 5
CCD 7
ACIS Histogram Mode Trends
We collected data from acis histogram mode data, and created trend plots of peak portions and peak widths against time (DOM). The peaks were estimated by fitting a simple Gaussian on three peaks (Al, Ti, and Mn), and the widths were estimated by a width at the half max from the peak.
All histogram data are taken under TIMED and GRADED_HIST mode, SIM position is at an external calibration source position, the focal temperature is around -119.7 C, and parameter settings in aciselec, acistemp are set to about same for all.
CCD 3, Peak Position
CCD 3, Peak Widths
CCD 3, Count Rates
HRC
DOSE of Central 4K Pore-Pairs
Please refer to Maximum Dose Trends for more details.
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_05_2011.fits 16777216 0.016 0.221 0.0 35.0
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_05_2011.fits 16777216 3.537 4.373 0.0 292.0
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_05_2011.fits 16777216 0.155 0.482 0.0 18.0
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_05_2011.fits 16777216 13.594 22.657 0.0 1623.0
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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Feb 2011 | Nov 2010 | Aug 2010 | May 2010 |
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Feb 2011 | Nov 2010 | Aug 2010 | May 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
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 May 2011
Sun Spot History
Trending
Quarterly Trends
- ACIS Thermal
- ACA Thermal
- SIM 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 |
1CRBT | 147.32 | 2.06 | -9.551e-01 | -6.799e+01 | K | COLD RADIATOR TEMP. B |
1PIN1AT | 287.82 | 6.24 | -1.881e+00 | 3.787e+02 | K | PSMC TEMP 1A |
Previous Quarter | ||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
AACBPPT | 301.96 | 0.85 | -3.629e+00 | 2.003e+00 | K | AC BASEPLATE TEMP (PRIME) |
AACBPRT | 296.92 | 0.77 | -3.310e+00 | 9.984e-01 | K | AC BASEPLATE TEMP (RDNT) |
AACCCDPT | 253.78 | 0.45 | -1.046e+00 | -7.768e+00 | K | AC CCD TEMP (PRI) |
AACCCDRT | 296.71 | 0.84 | -3.548e+00 | 1.111e+00 | K | AC CCD TEMP (RDNT) |
AACH1T | 293.80 | 0.84 | -3.402e+00 | -3.614e-01 | K | AC HOUSING TEMP (ACH1) |
AACH2T | 293.85 | 0.84 | -3.406e+00 | -5.635e-01 | K | AC HOUSING TEMP (ACH2) |
AAOTALT | 293.45 | 0.83 | -3.358e+00 | -8.264e-01 | K | AC OPT TEL ASSY LENS TEMP |
AAOTAPMT | 292.78 | 0.81 | -3.250e+00 | -6.789e-01 | K | AC OPT TEL ASSY PRIMARY MIRROR TEMP |
AAOTASMT | 292.91 | 0.81 | -3.330e+00 | 1.428e+00 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP |
AAOTH2MT | 293.37 | 0.82 | -3.365e+00 | -6.215e-01 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA) |
Previous Quarter | ||||||
MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
3TTHRC1T | 260.67 | 7.91 | -1.091e+01 | 2.854e-12 | K | TT AT HRC BIPOD ATTACH #1 |
3TTHRC2T | 266.39 | 7.77 | -9.279e+00 | -5.413e-13 | K | TT AT HRC BIPOD ATTACH #2 |
3TTHRC3T | 264.85 | 1.76 | -4.194e+00 | 1.559e-12 | K | TT AT HRC BIPOD ATTACH #3 & ACIS #4 |
PSUTEMP | 312.29 | 0.41 | 1.429e+00 | 3.422e-13 | (3FAPSAT) | SEA power supply temperature |
TSCMTRTEMP | 262.32 | 16.32 | -1.471e+01 | -3.472e-12 | K | TSC motor temperature |
Spacecraft Motions
Reaction Wheel Rotations
Note: From Feb 2010, the computation of reaction wheel rotations are slightly modified.
Links to Past Monthly Reports
Year | Month | |||||||||||
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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 |