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_aug16 6004901 7.703 13.758 0.0 2947 I2 node 0 262654 9.540400 3.893232 0.0 69.0 I2 node 1 262654 10.070112 7.733365 0.0 2001.0 I2 node 2 262654 9.816230 3.929448 0.0 80.0 I2 node 3 262654 9.925772 4.445665 0.0 312.0 I3 node 0 262654 11.420864 8.118283 0.0 2947.0 I3 node 1 262654 11.290878 11.476563 0.0 279.0 I3 node 2 262654 10.116671 5.163206 0.0 116.0 I3 node 3 262654 9.820936 3.975768 0.0 165.0 S2 node 0 262654 7.926513 3.609642 0.0 474.0 S2 node 1 262654 8.244705 3.920396 0.0 62.0 S2 node 2 262654 8.331269 3.764527 0.0 93.0 S2 node 3 262654 8.141501 3.648526 0.0 459.0 S3 node 0 262654 22.184911 38.689888 0.0 311.0 S3 node 1 262654 9.321868 4.839155 0.0 66.0 S3 node 2 262654 8.581775 3.312644 0.0 73.0 S3 node 3 262654 7.818631 3.136865 0.0 27.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2032.494 2649.700 0.0 116229 I2 node 0 262654 1736.877045 335.418070 355.0 9496.0 I2 node 1 262654 1829.294066 463.432888 371.0 53009.0 I2 node 2 262654 9.816230 3.929448 0.0 80.0 I2 node 3 262654 1860.282266 471.545387 357.0 28258.0 I3 node 0 262654 1963.973088 474.412429 355.0 7661.0 I3 node 1 262654 2053.389035 1560.814661 354.0 38885.0 I3 node 2 262654 1797.275580 326.307924 342.0 9737.0 I3 node 3 262654 9.820936 3.975768 0.0 165.0 S2 node 0 262654 2370.586696 346.882184 1272.0 21458.0 S2 node 1 262654 8.244705 3.920396 0.0 62.0 S2 node 2 262654 2777.398560 529.055405 1680.0 27388.0 S2 node 3 262654 2713.072569 382.296167 1578.0 47748.0 S3 node 0 262654 4222.980698 1862.563041 1750.0 13902.0 S3 node 1 262654 5399.243079 2145.682105 0.0 14360.0 S3 node 2 262654 4170.462079 1050.333367 1741.0 10048.0 S3 node 3 262654 3229.670495 486.775706 1856.0 10874.0
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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
Aug 2016 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -114.71 | +/- 2.48 C |
| Mean Width: | |
| 1.09 | +/- 0.67 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 |
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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_08_2016.fits 16777216 0.019 0.1391 0.0 3.0
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_08_2016.fits 16777216 4.479 5.000 0.0 292.0
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_08_2016.fits 16777216 15.982 28.548 0.0 1701.0
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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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HRMA Focus
Plots below show various characteristics of detected imaging sources. Standard level 2 data products (*src2.fits) are used. Only observations with focus (sim_x) within 0.01 mm of nominal value for given SI configuration are used. Sources are also filtered for strength (SNR > 15).
For individual detectors, please go to MTA SRC2 Monitoring page.
Source Sky Position
PSF vs Time
Source Ellipse Roundness
80% Encircled Energy Radius
Signal-to-Noise Ratio
Rotation
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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.
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PCAD
ACA Trending
Gyro Bias Drift
ACIS-S and HRC Celestial Location Monitoring
Science Instrument Positional Change Monitoring
The following plots are the difference between coordinates obtained from Chandra observations and those obtained from existing catalogs vs time in day of mission.
The following steps are taken to generate these plots.
- all observations with grating are selected
- even if the observation is not grating one, if it is a known point source, it is added to the list.
- observed ra, jan, target ra, jan, nominal ra, jan and a ratio of a target elliptical to psf (psfratio are extracted from src fits files.
- the observations with psfratio smaller than 4 are selected
- the differences between observed coordinates and targeted coordinates (if not available nominal coordinates) are computed
- if the differences are larger than 6 arcsec, the points are dropped
The large dispersion around DOM ~ 2400 (Jan 2005) are all due to none grating Capella observations. Many observations are off-axis observations (e.g., obsid 6558).
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 Aug 2016
Sun Spot History
Trending
Quarterly Trends
- Spacecraft Main Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| TASPPCM | 294.04 | 3.49 | 1.785e+01 | 2.358e+02 | K | AFT SHEAR PANEL TEMP:-Z PCAD COMP |
| TCM_SSR1 | 288.79 | 3.18 | 2.990e+01 | 1.848e+02 | K | SS RECORDER-1 TEMP |
| TCYLAFT6 | 309.22 | 4.30 | 1.973e+01 | 3.048e+02 | K | CNT CYL TEMP:16-IN FWD OF SC-TS FIT-6 |
| TSAMYT | 317.62 | 0.49 | 2.599e+00 | 5.570e+01 | K | -Y WING SOLAR ARRAY TEMP |
| TSAPYT | 317.53 | 0.50 | 2.554e+00 | 5.146e+01 | K | +Y WING SOLAR ARRAY TEMP |
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- Spacecraft Anc Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| TBOLTCUT | 238.39 | 15.78 | 3.633e+01 | -3.785e+02 | K | DOOR BOLT-CUTTER TEMP |
| TCNR_BRM | 274.12 | 1.70 | 6.655e+00 | 4.258e+01 | K | -Y/+Z PANEL CORNER PANEL TEMP (BRM) |
| TFSSBKT1 | 337.25 | 19.62 | 3.194e+01 | 2.352e+02 | K | FSS BRACKET-1 TEMP (+Y) |
| TFSSBKT2 | 331.50 | 25.94 | 3.485e+01 | 1.363e+02 | K | FSS BRACKET-2 TEMP (+Y) |
| TSCIUSF1 | 302.90 | 29.32 | 2.793e+01 | -4.532e+02 | K | SC-IUS FITTING-1 TEMP |
| TSCIUSF2 | 265.04 | 12.56 | 1.434e+01 | -1.889e+02 | K | SC-IUS FITTING-2 TEMP |
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- Battery Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| TB1T1 | 270.81 | 0.11 | 4.396e-02 | 7.437e-01 | K | BATT 1 TEMP 1 |
| TB2T2 | 273.38 | 7.202e-02 | -8.672e-02 | -2.028e-01 | K | BATT 3 TEMP 1 |
| TB3T2 | 273.46 | 9.001e-02 | -1.040e-01 | 5.336e-01 | K | BATT 3 TEMP 2 |
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Envelope Trending
ACIS Temperature
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
| Year | Month | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2016 | Jan | Feb | Mar | Apr | May | Jun | Jul | |||||
| 2015 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2014 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2013 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2012 | 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 |
| 2010 | 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 |
| 2008 | 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 |
| 2006 | 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 |
| 2004 | 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 |
| 2002 | 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 |
| 2000 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1999 | Jul | Aug | Sep | Oct | Nov | Dec | ||||||