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_sep10 6004901 9.25 14.08 0.0 698.0 I2 node 0 262654 9.924423 3.954068 0.0 53.0 I2 node 1 262654 10.531630 4.512628 0.0 352.0 I2 node 2 262654 10.615986 4.142995 0.0 81.0 I2 node 3 262654 10.317313 4.330576 0.0 98.0 I3 node 0 262654 11.331210 4.348760 0.0 62.0 I3 node 1 262654 12.155655 12.156607 0.0 290.0 I3 node 2 262654 10.995497 4.118772 0.0 80.0 I3 node 3 262654 10.908363 4.206408 0.0 160.0 S2 node 0 262654 12.141736 4.443819 0.0 90.0 S2 node 1 262654 12.722125 5.368791 0.0 103.0 S2 node 2 262654 12.953209 4.996702 0.0 161.0 S2 node 3 262654 12.406507 4.395636 0.0 635.0 S3 node 0 262654 17.651421 18.316550 0.0 196.0 S3 node 1 262654 15.534847 8.606411 0.0 122.0 S3 node 2 262654 12.648943 3.827534 1.0 91.0 S3 node 3 262654 11.519942 3.627361 0.0 58.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1425.96 1919.44 0.0 86746.0 I2 node 0 262654 1172.028156 223.648694 0.0 5643.0 I2 node 1 262654 1235.413911 298.541879 0.0 22393.0 I2 node 2 262654 1272.785343 276.576762 0.0 8744.0 I2 node 3 262654 1267.871605 322.827855 0.0 27559.0 I3 node 0 262654 1331.513211 325.571889 0.0 6200.0 I3 node 1 262654 1396.698147 1035.574804 0.0 26757.0 I3 node 2 262654 1209.849850 216.153457 0.0 5588.0 I3 node 3 262654 1197.831318 232.172051 0.0 21652.0 S2 node 0 262654 1724.041000 236.097912 874.0 20025.0 S2 node 1 262654 1834.108695 388.710852 907.0 9944.0 S2 node 2 262654 2035.598510 385.717992 1161.0 14155.0 S2 node 3 262654 1960.813554 282.474852 1139.0 29318.0 S3 node 0 262654 2904.137010 1393.030101 1207.0 11628.0 S3 node 1 262654 4150.166484 1844.986833 0.0 12247.0 S3 node 2 262654 3132.578546 866.075423 1134.0 7799.0 S3 node 3 262654 2403.274257 395.048811 1291.0 8992.0
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| Jun 2010 | Mar 2010 | Dec 2009 | Sep 2009 |
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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
Sep 2010 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -115.52 | +/- 2.60 C |
| Mean Width: | |
| 0.51 | +/- 0.62 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 and Sun Angle, Earth Engle, 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 |
ACIS Rejected Events
The links below are plots of stat1 quantities, showing on-board rejected events. The average EVTSENT, DROP_AMP, DROP_POS, DROP_GRD, THR_PIX, and maximum BERR_SUM obtained from L1 acis*stat1.fits files are plotted for each observation. CTI observations are plotted separately from regular science observations.
Column definitions:
- EVTSENT - number of events sent in data record
- DROP_AMP - number of discarded events due to corrected amplitude
- DROP_POS - number of discarded events due to CCD position
- DROP_GRD - number of discarded events due to grade code
- THR_PIX - number of pixels above respective threshold level
- BERR_SUM - number of pixel bias errors so far in science run
Note the half-life decline of the CTI source is clearly evidenced in the steady janline of EVTSENT.
CCD3 CTI Observations
CCD3 Science Observations
CCD7 CTI Observations
CCD7 Science Observations
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_09_2010.fits 16777216 0.023 0.164 0.0 15.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_09_2010.fits 16777216 3.347 4.150 0.0 292.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_09_2010.fits 16777216 0.041 0.217 0.0 13.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_09_2010.fits 16777216 13.133 22.033 0.0 1622.0
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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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| Jun 2010 | Mar 2010 | Dec 2009 | Sep 2009 |
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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 Sep 2010
Sun Spot History
Trending
Critical Trends
| ACIS Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1PDEAAT | 307.43 | 8.23 | -5.746e-01 | 2.148e+00 | K | PSMC DEA PS A TEMP |
| 1PIN1AT | 293.46 | 7.30 | -3.417e-01 | 1.933e+00 | K | PSMC TEMP 1A |
| HRMA Computed Averages - Daily Maximums | ||||||
| OBAAVG | 284.71 | 0.93 | 2.835e-01 | 7.560e-02 | K | OBA/TFTE TEMP |
| EPHIN Temperatures - Daily Maximums | ||||||
| TEIO | 312.96 | 17.74 | 2.193e+00 | 2.395e+00 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 310.05 | 7.79 | 2.700e+00 | 6.485e-01 | K | EPHIN SENSOR HOUSING TEMP |
| S/C Main Temperatures - Daily Maximums | ||||||
| TCYLFMZM | 297.67 | 23.13 | 7.174e-01 | -1.973e-03 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 |
| TCYLFMZP | 300.27 | 22.01 | 6.368e-01 | -1.527e-01 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-2 |
| S/C Ancillary Temperatures - Daily Maximums | ||||||
| TFSSBKT1 | 327.38 | 18.93 | 1.182e+00 | 8.658e-01 | K | FSS BRACKET-1 TEMP (+Y) |
| TFSSBKT2 | 323.33 | 23.27 | 6.479e-01 | 6.951e-01 | K | FSS BRACKET-2 TEMP (+Y) |
| TSCTSF1 | 289.73 | 3.97 | 9.835e-01 | -2.036e-01 | K | SC-TS FITTING -1 TEMP |
| TSCTSF6 | 289.46 | 4.46 | 1.129e+00 | -9.610e-02 | 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 | 308.89 | 10.64 | 1.764e+00 | 2.239e-01 | K | PROP LINE TEMP 02 |
| PLINE03T | 310.21 | 10.97 | 1.194e+00 | 5.255e-01 | K | PROP LINE TEMP 03 |
| PLINE04T | 298.07 | 10.06 | 2.199e-01 | 7.686e-01 | K | PROP LINE TEMP 04 |
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Quarterly Trends
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1CBAT | 204.23 | 1.34 | -2.740e-01 | 4.954e+00 | K | CAMERA BODY TEMP. A |
| 1CBBT | 204.70 | 1.48 | -1.337e+00 | 3.946e+01 | K | CAMERA BODY TEMP. B |
| 1PIN1AT | 290.69 | 7.84 | 3.677e+01 | -2.610e+01 | K | PSMC TEMP 1A |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 2CEAHVPT | 296.83 | 2.51 | 1.365e+01 | -3.846e+01 | K | CEA RADIATOR TEMPERATURE AT CENTER |
| 2CHTRPZT | 293.13 | 2.46 | 1.317e+01 | -1.087e+01 | K | CENTRAL ELECTRONICS BOX TEMP |
| 2PMT1T | 291.13 | 3.30 | 1.587e+01 | 5.884e+00 | K | PMT 1 TEMPERATURE |
| 2PMT2T | 293.82 | 3.46 | 1.627e+01 | 3.043e+01 | K | PMT 2 TEMPERATURE |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3TSMXSPT | 261.03 | 25.73 | -2.504e+01 | -4.916e-12 | K | -X TURTLE SHELL NR ACIS SS |
| 3TTHRC1T | 270.37 | 14.08 | 3.434e+01 | 2.607e-12 | K | TT AT HRC BIPOD ATTACH #1 |
| 3TTHRC2T | 275.72 | 13.65 | 3.182e+01 | 1.948e-11 | K | TT AT HRC BIPOD ATTACH #2 |
| 3TTHRC3T | 266.57 | 3.12 | 8.638e+00 | 1.549e-13 | K | TT AT HRC BIPOD ATTACH #3 & ACIS #4 |
| PSUTEMP | 312.72 | 0.86 | -7.078e-01 | -3.152e-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 | ||||