Science Run Interruptions
Science observations were interrupted twice in May. Due to high radiation, the science instrument safing sequence was activated at May 16, 10:18pm (EDT). Observations were restarted on May 18 with 93.8ks of science loss. (see details at Radiation Count Rate Plots for Periods Which Interrupted Science Runs).
Observations were again interrupted at May 28, 11:33pm (EDT) due to a spacecraft safemode event. The cause of the safemode was a trip of the sun-position monitor. Observations were restarted on May 30, 11:20pm (EDT). (for more detail descriptions about this event, see: June 1 2012, Operations CXO Status Report).
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_may12 6004901 9.309 16.706 0.0 422 I2 node 0 262654 5.286446 2.660011 0.0 36.0 I2 node 1 262654 5.698723 2.997176 0.0 181.0 I2 node 2 262654 5.586308 2.716664 0.0 44.0 I2 node 3 262654 5.640350 2.891595 0.0 36.0 I3 node 0 262654 6.255952 3.075821 0.0 36.0 I3 node 1 262654 7.009747 6.159692 0.0 152.0 I3 node 2 262654 5.916915 2.780792 0.0 48.0 I3 node 3 262654 5.722084 2.762056 0.0 240.0 S2 node 0 262654 8.661504 3.541274 0.0 172.0 S2 node 1 262654 9.375980 4.025898 0.0 65.0 S2 node 2 262654 9.845554 4.387229 0.0 250.0 S2 node 3 262654 8.982076 3.648002 0.0 392.0 S3 node 0 262654 22.460164 23.037504 0.0 283.0 S3 node 1 262654 47.455664 37.869679 0.0 261.0 S3 node 2 262654 30.716471 27.106902 2.0 245.0 S3 node 3 262654 13.338815 5.951792 0.0 91.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1602.06 2142.65 0.0 95132 I2 node 0 262654 1325.371067 256.487318 0.0 6784.0 I2 node 1 262654 1399.702648 345.552720 0.0 28633.0 I2 node 2 262654 1433.580376 309.729465 0.0 8940.0 I2 node 3 262654 1429.617513 365.092097 0.0 27724.0 I3 node 0 262654 1497.345203 364.788698 0.0 6559.0 I3 node 1 262654 1572.232582 1188.944610 0.0 30521.0 I3 node 2 262654 1367.594261 249.060214 0.0 6551.0 I3 node 3 262654 1352.437500 264.546495 0.0 24029.0 S2 node 0 262654 1913.767425 269.488191 997.0 20835.0 S2 node 1 262654 2035.310232 439.968514 1030.0 11252.0 S2 node 2 262654 2257.190349 425.943727 1338.0 16397.0 S2 node 3 262654 2186.157871 314.154246 1276.0 34981.0 S3 node 0 262654 3340.556457 1664.676723 1397.0 13102.0 S3 node 1 262654 4540.786212 1979.915829 0.0 13608.0 S3 node 2 262654 3438.496266 927.007118 1313.0 8582.0 S3 node 3 262654 2644.522895 419.232612 1485.0 9547.0
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| Feb 2012 | Nov 2011 | Aug 2011 | May 2011 |
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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 2012 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -114.02 | +/- 4.22 C |
| Mean Width: | |
| 0.43 | +/- 0.34 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.
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_05_2012.fits 16777216 3.860 4.706 0.0 292.0
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_05_2012.fits 16777216 13.931 23.110 0.0 1629.0
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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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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.
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 2012
Sun Spot History
Trending
Quarterly Trends
- ACIS Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 206.01 | 2.19 | 6.627e+00 | -2.003e+02 | K | CAMERA BODY TEMP. A |
| 1CBBT | 206.66 | 2.17 | 5.653e+00 | -1.803e+02 | K | CAMERA BODY TEMP. B |
| 1CRAT | 147.15 | 2.66 | 1.622e+00 | -5.018e+01 | K | COLD RADIATOR TEMP. A |
| 1CRBT | 147.74 | 2.78 | 2.000e+00 | -4.411e+01 | K | COLD RADIATOR TEMP. B |
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- Ephin Voltage and Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 5EIOT | 340.81 | 15.41 | -4.151e+01 | -3.512e+02 | K | EIO TEMP |
| 5EPHINT | 320.73 | 4.45 | -1.741e+01 | -2.197e+02 | K | EPHIN TEMP |
| HKEBOXTEMP | 325.27 | 4.55 | -1.912e+01 | -2.195e+02 | K | EPHIN HOUSEKEEPING EBOX: TEMPERATURE (5EHSE300) |
| TEIO | 314.26 | 17.64 | -4.927e+01 | -3.857e+02 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 320.50 | 4.63 | -1.999e+01 | -2.078e+02 | K | EPHIN SENSOR HOUSING TEMP |
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- PCAD Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AACCCDRT | 297.55 | 0.64 | -3.648e+00 | -3.613e+01 | K | AC CCD TEMP (RDNT) |
| AACH1T | 294.66 | 0.69 | -3.851e+00 | -3.886e+01 | K | AC HOUSING TEMP (ACH1) |
| AACH2T | 294.70 | 0.70 | -3.882e+00 | -3.845e+01 | K | AC HOUSING TEMP (ACH2) |
| AAOTALT | 294.30 | 0.69 | -3.861e+00 | -3.884e+01 | K | AC OPT TEL ASSY LENS TEMP |
| AAOTAPMT | 293.62 | 0.70 | -3.889e+00 | -3.734e+01 | K | AC OPT TEL ASSY PRIMARY MIRROR TEMP |
| AAOTASMT | 293.76 | 0.68 | -3.801e+00 | -3.637e+01 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP |
| AAOTH2MT | 294.22 | 0.68 | -3.824e+00 | -3.733e+01 | K | AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA) |
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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 | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2012 | Jan | Feb | Mar | Apr | ||||||||