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_aug15 6004901 8.015 13.777 0.0 2524 I2 node 0 262654 9.464817 3.851398 0.0 60.0 I2 node 1 262654 9.905818 4.393387 0.0 737.0 I2 node 2 262654 9.791872 3.850186 0.0 89.0 I2 node 3 262654 9.937424 6.654422 0.0 2524.0 I3 node 0 262654 9.976621 4.339511 0.0 362.0 I3 node 1 262654 10.124652 9.089848 0.0 457.0 I3 node 2 262654 9.231498 3.683744 0.0 79.0 I3 node 3 262654 9.381200 3.811349 0.0 131.0 S2 node 0 262654 9.517253 3.925411 0.0 771.0 S2 node 1 262654 9.718355 4.153236 0.0 68.0 S2 node 2 262654 9.816701 3.934807 0.0 294.0 S2 node 3 262654 9.883314 4.133386 0.0 735.0 S3 node 0 262654 21.645140 36.607532 0.0 298.0 S3 node 1 262654 12.962562 13.173593 0.0 199.0 S3 node 2 262654 9.671833 3.300881 0.0 39.0 S3 node 3 262654 8.613364 3.051001 0.0 76.0
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Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 1947.010 2545.603 0.0 111954 I2 node 0 262654 1643.554370 314.887052 326.0 9207.0 I2 node 1 262654 1731.645000 435.015816 355.0 42490.0 I2 node 2 262654 1764.429294 369.882578 352.0 9303.0 I2 node 3 262654 1762.772819 444.163768 336.0 28147.0 I3 node 0 262654 1852.631686 442.332055 325.0 7203.0 I3 node 1 262654 1942.339733 1463.887520 338.0 36711.0 I3 node 2 262654 1695.853916 304.706114 321.0 8866.0 I3 node 3 262654 1683.464404 326.007488 298.0 28042.0 S2 node 0 262654 2274.688419 330.734016 1206.0 21319.0 S2 node 1 262654 2417.671257 527.154437 1278.0 13294.0 S2 node 2 262654 2671.996159 512.312847 1630.0 27290.0 S2 node 3 262654 2610.248067 372.144231 1540.0 44649.0 S3 node 0 262654 4037.469796 1830.266618 1675.0 13769.0 S3 node 1 262654 5257.589200 2131.212615 0.0 14243.0 S3 node 2 262654 4040.467674 1040.965119 1642.0 9760.0 S3 node 3 262654 3111.320495 476.889969 1782.0 10598.0
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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 2015 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -112.64 | +/- 4.55 C |
| Mean Width: | |
| 2.69 | +/- 2.15 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 |
HRC
DOSE of Central 4K Pore-Pairs
Please refer to Maximum Dose Trends for more details.
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCI_08_1999_08_2015.fits 16777216 4.328 4.917 0.0 292.0
No Data
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IMAGE NPIX MEAN STDDEV MIN MAX
HRCS_08_1999_08_2015.fits 16777216 15.747 27.909 0.0 1691.0
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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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| May 2015 | Feb 2015 | Nov 2014 | Aug 2014 |
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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.
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 2015
Sun Spot History
Trending
Quarterly Trends
- SIM Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| 3BTU_BPT | 265.23 | 7.66 | 1.437e+01 | 2.072e-12 | K | BTU BASEPLATE (+X)), ABORT HTR TSC2 |
| 3TSMXCET | 240.91 | 3.244e+01 | 4.040e+01 | 5.413e-12 | K | -X TURTLE SHELL NR HRC CEA |
| BOXTEMP | 282.37 | 1.34 | 2.340e+00 | -4.823e-13 | K | SEA box temperature (3FASEAAT) |
| PSUTEMP | 311.66 | 1.08 | 1.284e+00 | -1.199e-13 | K | SEA power supply temperature (3FAPSAT) |
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- SIM Electronics
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| AGRNDADC | 2.367e-04 | 1.967e-04 | -9.931e-05 | 7.120e-03 | V | Analog ground A/D convert reading |
| FATABADC | 5.00 | 2.340e-03 | -5.514e-03 | 1.028e-01 | Converter | FA Tab Position Sensor A/D |
| N15VADC | -15.01 | 4.521e-04 | -4.581e-04 | 3.797e-02 | Reading | -15V Power Supply A/D Converter |
| P15VADC | 14.96 | 5.227e-04 | 3.713e-05 | 5.207e-02 | Reading | +15V Power Supply A/D Converter |
| P5VADC | 4.99 | 2.294e-02 | -3.606e-02 | 8.768e-01 | Reading | +5V Power Supply A/D Converter |
| TSCTABADC | 5.00 | 4.134e-03 | -7.886e-03 | 1.128e-01 | converter | TSC Tab Position Sensor A/D |
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- Spacecraft Main Temperature
| Previous Quarter | ||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION |
| TAPE2PST | 290.19 | 0.86 | -2.106e+00 | -1.534e+00 | K | PEA-2 POWER SUPPLY TEMP |
| TCM_IFU | 286.89 | 2.21 | 1.170e+01 | 1.142e+02 | K | IU TEMP |
| TCYLAFT6 | 306.00 | 3.99 | -9.434e-01 | 2.771e+02 | K | CNT CYL TEMP:16-IN FWD OF SC-TS FIT-6 |
| TEP_PSU1 | 266.06 | 1.29 | 4.502e+00 | 1.399e+02 | K | PSU-1 TEMP |
| TSAMYT | 317.68 | 0.71 | 3.217e+00 | 7.434e+01 | K | -Y WING SOLAR ARRAY TEMP |
| TSAPYT | 317.56 | 0.71 | 3.309e+00 | 6.740e+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 | 237.29 | 17.42 | 5.316e+01 | 1.658e+03 | K | DOOR BOLT-CUTTER TEMP |
| TFSSBKT1 | 334.79 | 19.34 | -1.311e+01 | 4.172e+02 | K | FSS BRACKET-1 TEMP (+Y) |
| TFSSBKT2 | 328.97 | 24.89 | -1.777e+01 | 5.888e+02 | K | FSS BRACKET-2 TEMP (+Y) |
| TSCIUSF1 | 295.87 | 29.04 | -2.208e+01 | 1.704e+03 | K | SC-IUS FITTING-1 TEMP |
| TSCIUSF2 | 261.62 | 13.87 | -1.669e+01 | 7.054e+02 | K | SC-IUS FITTING-2 TEMP |
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Envelope Trending
OBA Heater
PCAD 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2015 | Jan | Feb | Mar | Apr | May | Jun | Jul | |||||
| 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 | ||||||