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_mar11 6004901 10.68 19.49 0.0 597 I2 node 0 262654 6.960911 3.170432 0.0 47.0 I2 node 1 262654 7.418170 3.637983 0.0 266.0 I2 node 2 262654 7.300240 3.243623 0.0 76.0 I2 node 3 262654 7.286761 3.505244 0.0 126.0 I3 node 0 262654 8.087883 3.748395 0.0 44.0 I3 node 1 262654 8.304779 7.828700 0.0 446.0 I3 node 2 262654 7.598799 3.228477 0.0 61.0 I3 node 3 262654 7.512436 3.273744 0.0 151.0 S2 node 0 262654 12.047086 4.298641 0.0 446.0 S2 node 1 262654 12.976852 5.041692 0.0 102.0 S2 node 2 262654 15.879301 6.477520 0.0 180.0 S2 node 3 262654 19.607663 9.324458 0.0 333.0 S3 node 0 262654 44.213905 59.228913 1.0 359.0 S3 node 1 262654 27.227797 18.952459 0.0 235.0 S3 node 2 262654 17.194730 4.822694 1.0 52.0 S3 node 3 262654 14.038897 3.964982 1.0 76.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1493.90 2006.62 0.0 90703 I2 node 0 262654 1226.412228 235.634162 0.0 5988.0 I2 node 1 262654 1294.189825 315.110621 0.0 24261.0 I2 node 2 262654 1329.882366 288.770730 0.0 8803.0 I2 node 3 262654 1325.392997 338.628845 0.0 27617.0 I3 node 0 262654 1392.460263 341.495823 0.0 6320.0 I3 node 1 262654 1459.906219 1092.907734 0.0 28219.0 I3 node 2 262654 1266.415089 228.718974 0.0 5909.0 I3 node 3 262654 1252.856056 244.036531 0.0 22547.0 S2 node 0 262654 1790.208525 247.559857 920.0 20082.0 S2 node 1 262654 1904.182594 406.642642 946.0 10439.0 S2 node 2 262654 2112.180584 398.734604 1226.0 14868.0 S2 node 3 262654 2040.302015 294.824982 1177.0 31191.0 S3 node 0 262654 3050.009517 1463.858353 1263.0 12061.0 S3 node 1 262654 4285.613317 1886.096166 0.0 12618.0 S3 node 2 262654 3245.396917 894.555771 1193.0 8146.0 S3 node 3 262654 2485.487527 401.873522 1364.0 9203.0
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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
Feb 2011 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -113.56 | +/- 5.15 C |
| Mean Width: | |
| 0.52 | +/- 0.38 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_03_2011.fits 16777216 0.023 0.202 0.0 42.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_03_2011.fits 16777216 3.514 4.310 0.0 292.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_03_2011.fits 16777216 0.100 0.403 0.0 34.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_03_2011.fits 16777216 13.439 22.435 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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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 Mar 2011
Sun Spot History
Trending
Critical Trends
| ACIS Temperatures - Daily Maximums | ||||||
|---|---|---|---|---|---|---|
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 1PDEAAT | 307.75 | 8.19 | -3.621e-01 | -7.267e-01 | K | PSMC DEA PS A TEMP |
| 1PIN1AT | 293.71 | 7.37 | -2.154e-01 | -4.187e-01 | K | PSMC TEMP 1A |
| HRMA Computed Averages - Daily Maximums | ||||||
| OBAAVG | 284.81 | 1.03 | 3.025e-01 | 4.374e-02 | K | OBA/TFTE TEMP |
| EPHIN Temperatures - Daily Maximums | ||||||
| TEIO | 313.92 | 17.87 | 2.038e+00 | -1.578e-01 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 310.80 | 8.12 | 2.734e+00 | 4.429e-02 | K | EPHIN SENSOR HOUSING TEMP |
| S/C Main Temperatures - Daily Maximums | ||||||
| TCYLFMZM | 297.24 | 23.20 | 6.027e-01 | -1.685e+00 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-1 |
| TCYLFMZP | 299.86 | 22.11 | 5.503e-01 | -1.626e+00 | K | CNT CYL TEMP:-Z SIDE UNDER LAE-2 |
| S/C Ancillary Temperatures - Daily Maximums | ||||||
| TFSSBKT1 | 327.21 | 19.73 | 1.342e+00 | -2.006e+00 | K | FSS BRACKET-1 TEMP (+Y) |
| TFSSBKT2 | 322.92 | 24.32 | 8.478e-01 | -1.940e+00 | K | FSS BRACKET-2 TEMP (+Y) |
| TSCTSF1 | 290.09 | 4.09 | 1.006e+00 | -1.623e-01 | K | SC-TS FITTING -1 TEMP |
| TSCTSF6 | 289.88 | 4.62 | 1.160e+00 | -1.535e-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 | 309.42 | 10.77 | 1.768e+00 | -4.855e-01 | K | PROP LINE TEMP 02 |
| PLINE03T | 310.50 | 11.11 | 1.192e+00 | 1.130e-01 | K | PROP LINE TEMP 03 |
| PLINE04T | 298.32 | 10.02 | 3.065e-01 | -2.454e-01 | K | PROP LINE TEMP 04 |
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Quarterly Trends
- HRMA Thermal
- DEA/DPA Thermal
- OBA Heaters
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 4RT568T | 288.62 | 0.63 | -3.231e+00 | -4.143e+00 | K | RT 568 - HRMA TEMP |
| 4RT575T | 290.01 | 0.87 | -3.899e+00 | -1.957e+01 | K | RT 575 - OB CONE TEMP |
| 4RT576T | 284.07 | 0.65 | -3.334e+00 | -6.986e+00 | K | RT 576 - OB CONE TEMP |
| 4RT577T | 290.09 | 1.88 | -7.727e+00 | 2.962e+01 | K | RT 577 - OB CONE TEMP |
| 4RT578T | 288.11 | 1.53 | -6.824e+00 | 3.320e+01 | K | RT 578 - OB CONE TEMP |
| 4RT579T | 285.03 | 1.23 | -5.174e+00 | 3.683e+01 | K | RT 579 - OB CONE TEMP |
| 4RT580T | 284.73 | 1.18 | -5.026e+00 | 3.299e+01 | K | RT 580 - OB CONE TEMP |
| 4RT581T | 286.56 | 2.28 | -9.503e+00 | 9.038e+01 | K | RT 581 - OB CONE TEMP |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| DEAHK1 | 20.42 | 5.81 | 1.365e+01 | -1.547e+02 | C | DPA Thermistor 1 - BEP PC Board |
| DEAHK2 | 18.71 | 5.95 | 1.409e+01 | -1.598e+02 | C | DPA Thermistor 2 - BEP Oscillator |
| DEAHK3 | 22.13 | 7.88 | 1.937e+01 | -8.299e+01 | C | DPA Thermistor 3 - FEP 0 Mongoose |
| DEAHK4 | 20.17 | 6.99 | 1.739e+01 | -1.089e+02 | C | DPA Thermistor 4 - FEP 0 PC Board |
| DEAHK5 | 22.26 | 7.56 | 1.874e+01 | -9.822e+01 | C | DPA Thermistor 5 - FEP 0 ACTEL |
| DEAHK6 | 21.66 | 7.13 | 1.778e+01 | -1.140e+02 | C | DPA Thermistor 6 - FEP 0 RAM |
| DEAHK7 | 18.19 | 6.70 | 1.654e+01 | -1.366e+02 | C | DPA Thermistor 7 - FEP 0 Frame Buf. |
| DEAHK8 | 25.80 | 6.40 | 1.552e+01 | -1.427e+02 | C | DPA Thermistor 8 - FEP 1 Mongoose |
| DEAHK9 | 22.71 | 6.38 | 1.543e+01 | -1.458e+02 | C | DPA Thermistor 9 - FEP 1 PC Board |
| DEAHK10 | 25.33 | 6.55 | 1.591e+01 | -1.468e+02 | C | DPA Thermistor 10- FEP 1 ACTEL |
| DEAHK11 | 24.39 | 6.56 | 1.618e+01 | -1.384e+02 | C | DPA Thermistor 11- FEP 1 RAM |
| DEAHK12 | 19.26 | 6.56 | 1.596e+01 | -1.573e+02 | C | DEA Video Board ADC |
| DEAHK15 | -248.65 | 0.17 | -7.851e-02 | -5.408e+00 | C | Focal Plane Temp. Board 12 |
| DEAHK16 | -119.32 | 0.85 | 2.539e+00 | 1.086e+01 | C | Focal Plane Temp. Board 11 |
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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 | ||||||||||