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.
Please check more detail plots at Telemetered Photon Dose Trend page.
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Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_jan16 6004901 8.314 13.835 0.0 2558 I2 node 0 262654 5.954853 2.877719 0.0 47.0 I2 node 1 262654 6.191226 3.102563 0.0 341.0 I2 node 2 262654 6.055811 2.869679 0.0 51.0 I2 node 3 262654 6.100433 3.022514 0.0 38.0 I3 node 0 262654 7.307637 3.441984 0.0 61.0 I3 node 1 262654 7.348421 6.515304 0.0 613.0 I3 node 2 262654 7.054573 3.766338 0.0 91.0 I3 node 3 262654 6.877924 3.197404 0.0 123.0 S2 node 0 262654 11.153822 6.531832 0.0 2558.0 S2 node 1 262654 12.089212 6.199058 0.0 90.0 S2 node 2 262654 12.859712 8.133580 0.0 1414.0 S2 node 3 262654 11.955613 5.935914 0.0 890.0 S3 node 0 262654 26.995971 38.139999 0.0 310.0 S3 node 1 262654 15.403315 8.493853 0.0 120.0 S3 node 2 262654 14.959727 7.445179 0.0 124.0 S3 node 3 262654 14.634594 9.908361 0.0 121.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1983.927 2590.276 0.0 113842 I2 node 0 262654 1683.357659 323.452997 338.0 9249.0 I2 node 1 262654 1773.425391 446.358238 362.0 45202.0 I2 node 2 262654 6.055811 2.869679 0.0 51.0 I2 node 3 262654 1804.349129 455.656603 344.0 28197.0 I3 node 0 262654 1899.630917 455.113687 336.0 7409.0 I3 node 1 262654 1989.661456 1501.738681 343.0 37521.0 I3 node 2 262654 1739.455060 313.784597 332.0 9235.0 I3 node 3 262654 6.877924 3.197404 0.0 123.0 S2 node 0 262654 2316.351114 337.731738 1234.0 21386.0 S2 node 1 262654 12.089212 6.199058 0.0 90.0 S2 node 2 262654 2716.646975 518.583197 1658.0 27332.0 S2 node 3 262654 2654.145821 375.234687 1557.0 45983.0 S3 node 0 262654 4119.416425 1837.193323 1708.0 13836.0 S3 node 1 262654 5319.672401 2134.557571 0.0 14305.0 S3 node 2 262654 4098.339491 1042.358833 1700.0 9890.0 S3 node 3 262654 3164.764122 479.213225 1810.0 10709.0
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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
Imaging CCDs
Spectral CCDs
Backside CCDs
Focal Plane Temperature
Jan 2016 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -114,29 | +/- 2.19 C |
| Mean Width: | |
| 0.89 | +/- 0.28 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 |
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_01_2016.fits 16777216 0.004 0.0662 0.0 9.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_01_2016.fits 16777216 4.380 4.960 0.0 292.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_01_2016.fits 16777216 0.018 0.2181 0.0 21.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_01_2016.fits 16777216 15.900 28.368 0.0 1695.0
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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 Jan 2016
Sun Spot History
Trending
Quarterly Trends
- PCAD FTS Temperature and Gradient
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| OHRTHR27 | 297.15 | 4.617e-03 | -8.464e-03 | -1.709e-02 | K | RT 20 : PERISCOPE |
| OHRTHR42 | 294.65 | 4.831e-02 | 2.380e-01 | -7.361e-01 | K | RT 133: PERISCOPE |
| OHRTHR43 | 294.66 | 0.14 | 6.750e-01 | -1.959e+00 | K | RT 134: PERISCOPE |
| OOBAGRD3 | -0.09 | 8.924e-02 | -4.339e-01 | 1.177e+00 | K | RT 505 TO RT 504: PERISCOPE GRADIENT |
| OOBAGRD6 | 0.08 | 2.972e-03 | 1.466e-02 | -1.216e-02 | K | RT 507 TO RT 506: PERISCOPE GRADIENT |
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- SIM Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3BTU_BPT | 267.66 | 7.85 | -3.128e+01 | -1.356e-11 | K | BTU BASEPLATE (+X)), ABORT HTR TSC2 |
| 3TSMXCET | 244.55 | 3.539e+01 | 7.357e+01 | 3.590e-11 | K | -X TURTLE SHELL NR HRC CEA |
| 3TSMXSPT | 284.82 | 3.285e+01 | 7.537e+01 | 4.050e-11 | K | -X TURTLE SHELL NR ACIS SS |
| BOXTEMP | 282.41 | 1.64 | -4.591e+00 | 3.542e-13 | K | SEA box temperature (3FASEAAT) |
| FAMTRTEMP | 272.84 | 2.58 | -9.682e+00 | 3.259e-12 | K | FA motor temperature |
| FLEXATEMP | 271.35 | 2.73 | -7.803e+00 | -2.070e-12 | K | Flexure A temperature (3FAFLAAT) |
| PSUTEMP | 311.06 | 1.37 | -4.481e+00 | 9.909e-13 | K | SEA power supply temperature (3FAPSAT) |
| TSCMTRTEMP | 274.33 | 20.04 | -7.602e+01 | 4.450e-12 | K | TSC motor temperature |
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- SIIM Electronics
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AGRNDADC | 1.991e-04 | 2.062e-04 | 4.422e-04 | -7.360e-03 | V | Analog ground A/D convert reading |
| FATABADC | 5.00 | 2.411e-03 | 6.822e-03 | -1.579e-01 | Converter | FA Tab Position Sensor A/D |
| N15VADC | -15.01 | 5.163e-04 | 8.341e-04 | -2.951e-02 | Reading | -15V Power Supply A/D Converter |
| P15VADC | 14.96 | 5.564e-04 | 2.164e-03 | -3.088e-02 | Reading | +15V Power Supply A/D Converter |
| P5VADC | 5.00 | 2.464e-02 | 7.255e-02 | -1.180e+00 | Reading | +5V Power Supply A/D Converter |
| TSCTABADC | 5.00 | 4.425e-03 | 1.275e-02 | -2.533e-01 | converter | TSC Tab Position Sensor A/D |
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Envelope Trending
MUPS
OBA Heaters
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
Links to Past Monthly Reports
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| 1999 | Jul | Aug | Sep | Oct | Nov | Dec | ||||||