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_jan10 6004901 11.691 17.813 0.0 748.0 I2 node 0 262654 11.838490 4.279727 0.0 77.0 I2 node 1 262654 12.631084 4.918798 0.0 319.0 I2 node 2 262654 12.356194 4.338325 0.0 64.0 I2 node 3 262654 12.539404 4.788024 0.0 70.0 I3 node 0 262654 12.235793 5.316581 0.0 141.0 I3 node 1 262654 12.874302 13.265663 0.0 315.0 I3 node 2 262654 11.722222 4.142934 0.0 84.0 I3 node 3 262654 11.726753 4.223295 0.0 188.0 S2 node 0 262654 14.904282 6.900815 0.0 489.0 S2 node 1 262654 16.606544 11.036885 0.0 155.0 S2 node 2 262654 18.583613 16.881150 0.0 223.0 S2 node 3 262654 16.237407 9.963128 0.0 379.0 S3 node 0 262654 17.898694 14.406884 0.0 275.0 S3 node 1 262654 18.897386 7.645184 0.0 135.0 S3 node 2 262654 19.956733 11.827480 2.0 181.0 S3 node 3 262654 20.492694 20.137575 1.0 235.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1354.17 1828.63 0.0 82282.0 I2 node 0 262654 1087.021912 205.677542 0.0 5095.0 I2 node 1 262654 1146.288144 274.273685 0.0 20104.0 I2 node 2 262654 1185.116039 258.879525 0.0 8651.0 I2 node 3 262654 1178.362750 301.276955 0.0 27469.0 I3 node 0 262654 1242.882495 306.601488 0.0 6019.0 I3 node 1 262654 1303.441185 948.130012 0.0 24642.0 I3 node 2 262654 1125.030653 199.538984 0.0 5043.0 I3 node 3 262654 1110.490162 212.559557 0.0 20321.0 S2 node 0 262654 1620.297905 218.441360 808.0 19935.0 S2 node 1 262654 1721.046954 359.751384 840.0 9180.0 S2 node 2 262654 1908.626383 355.053404 1087.0 13050.0 S2 node 3 262654 1840.899961 255.281430 1058.0 26584.0 S3 node 0 262654 2769.340556 1333.594588 1144.0 11248.0 S3 node 1 262654 4013.151253 1823.945823 0.0 12081.0 S3 node 2 262654 3001.383881 852.522733 1052.0 7490.0 S3 node 3 262654 2278.066916 365.909864 1212.0 8700.0
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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
January 2010 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -111.61 | +/- 6.35 C |
| Mean Width: | |
| 0.42 | +/- 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 |
NOTE:
Many sources observed during December had very high dose, and could not be used to compute science instrument background rates. Consequently, the plots for December are very spersely ploted.
ACIS Corner Pixels
We plot the average corner pixel centroid slope and mean for ACIS observations. Separate plots are shown for FAINT MODE (3X3) and VFAINT MODE (5X5) observations. Metric is the centroid of a Gaussian fit to the histogram of corner pixel PHA values of detected events. Plus signs are FAINT observations, diamonds are VFAINT observations, and boxes are VFAINT observations with centroids computed using only the corner pixels of a 3X3 event island (referred to as AFAINT). We see a very small upward trend.
CCD: I3
CCD: S3
ACIS Bias Trends
The bias plus overclock level was calculated as follows:
- Get acisf*bias0.fits is obtained from a database or /dsops/ap/sdp/cache/*/acis/
- Data with timed mode exposure is selected.
- Fits files were divided into 4 quads, then an average of bias level for each quad is computed. No corrections for dead spots, columns etc were included.
An example of Overclock values as reported in FITS file header:
An example of mean bias minus overclock value:
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_12_2009.fits 16777216 0.303 0.757 0.0 13.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_01_2010.fits 16777216 3.134 3.997 0.0 292.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_01_2010.fits 16777216 0.040 0.525 0.0 69.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_01_2010.fits 16777216 12.834 21.172 0.0 1580.0
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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
| id_num | id_string | good | marginal | bad | number | mag_i_avg (mag) | mag_i_min (mag) | mag_i_max (mag) |
| 1 | ACIS-1 | 100.000 | 0.000 | 0.000 | 2660 | Inf | 5.433 | Inf |
| 2 | ACIS-2 | 99.887 | 0.000 | 0.113 | 3534 | 6.956 | 4.524 | 7.569 |
| 3 | ACIS-3 | 100.000 | 0.000 | 0.000 | 34 | 7.250 | 6.593 | 7.383 |
| 4 | ACIS-4 | 99.796 | 0.000 | 0.204 | 3928 | Inf | 5.115 | Inf |
| 5 | ACIS-5 | 99.842 | 0.000 | 0.158 | 5072 | Inf | 5.137 | Inf |
| 6 | ACIS-6 | 100.000 | 0.000 | 0.000 | 2244 | Inf | 5.508 | Inf |
| 7 | HRC-I-1 | 100.000 | 0.000 | 0.000 | 468 | 6.872 | 4.936 | 7.294 |
| 8 | HRC-I-2 | 100.000 | 0.000 | 0.000 | 470 | 6.923 | 6.264 | 7.152 |
| 9 | HRC-I-3 | 97.571 | 0.000 | 2.429 | 494 | 6.979 | 6.588 | 7.182 |
| 10 | HRC-I-4 | 97.143 | 0.000 | 2.857 | 210 | 6.891 | 6.299 | 6.976 |
| 11 | HRC-S-1 | 99.537 | 0.000 | 0.463 | 432 | 6.909 | 5.281 | 7.284 |
| 12 | HRC-S-2 | 99.541 | 0.000 | 0.459 | 436 | 6.914 | 6.156 | 8.385 |
| 13 | HRC-S-3 | 99.503 | 0.000 | 0.498 | 402 | Inf | 5.958 | Inf |
| 14 | HRC-S-4 | 100.000 | 0.000 | 0.000 | 174 | Inf | 5.590 | Inf |
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ACIS-1
ACIS-6
HRC-I-1
HRC-S-1
Gyro Bias Drift
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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 Jan 2010
Sun Spot History
Trending
Quarterly Trends
- Ephin Temperature/Voltage
- SIM Thermal
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| TEIO | 312.46 | 19.27 | 2.994e+01 | -6.518e+02 | K | EPHIN ELECTRONICS HOUSING TEMP |
| TEPHIN | 316.17 | 3.68 | 1.043e+01 | -3.566e+02 | K | EPHIN SENSOR HOUSING TEMP |
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| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3BTU_BPT | 266.07 | 8.83 | 4.078e+01 | -1.849e-11 | K | BTU BASEPLATE (+X)), ABORT HTR TSC2 |
| 3TSMXCET | 225.35 | 27.64 | -2.284e+01 | -4.881e-12 | K | -X TURTLE SHELL NR HRC CEA |
| 3TSMXSPT | 265.43 | 24.78 | -2.968e+01 | -3.034e-12 | K | -X TURTLE SHELL NR ACIS SS |
| 3TTHRC1T | 268.66 | 13.49 | 5.670e+01 | 1.278e-11 | K | TT AT HRC BIPOD ATTACH #1 |
| 3TTHRC2T | 274.08 | 13.05 | 5.178e+01 | 7.882e-12 | K | TT AT HRC BIPOD ATTACH #2 |
| 3TTHRC3T | 266.22 | 2.94 | 1.572e+01 | -8.141e-13 | K | TT AT HRC BIPOD ATTACH #3 & ACIS #4 |
| 3TTRALAT | 245.24 | 7.76 | 1.483e+01 | 3.423e-12 | K | TT AT RAIL A, ABORT HTR TSC3 |
| 3TTRALCT | 264.95 | 4.87 | 2.531e+01 | 6.016e-12 | K | TT AT RAIL C, ABORT HTR TSC5 |
| 3TTVALVT | 253.49 | 9.77 | 8.512e-02 | 4.091e-15 | K | TT AT VENT VALVE, ABORT HTR TSC7 |
| BOXTEMP | 282.45 | 1.00 | 1.049e+00 | -1.100e-13 | K | SEA box temperature |
| FAMTRTEMP | 270.86 | 2.07 | 7.801e+00 | -8.445e-13 | K | FA motor temperature |
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Spacecraft Motions
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Reaction Wheel Rotations
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 |