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.
)
)
)
Statistics: # IMAGE NPIX MEAN RMS MIN MAX ACIS_nov24 6004901 3.322 3.996 0.0 573 I2 node 0 262654 2.702647 1.866498 0.0 48.0 I2 node 1 262654 2.951531 2.079729 0.0 312.0 I2 node 2 262654 2.819701 1.902824 0.0 68.0 I2 node 3 262654 2.796512 2.080949 0.0 349.0 I3 node 0 262654 3.188783 2.044010 0.0 64.0 I3 node 1 262654 3.091273 1.987114 0.0 91.0 I3 node 2 262654 3.107057 1.983762 0.0 59.0 I3 node 3 262654 3.079084 1.972527 0.0 78.0 S2 node 0 262654 4.654603 2.466905 0.0 130.0 S2 node 1 262654 4.719409 2.802227 0.0 313.0 S2 node 2 262654 4.702474 2.773379 0.0 355.0 S2 node 3 262654 4.582001 3.014578 0.0 573.0 S3 node 0 262654 6.586715 2.874145 0.0 90.0 S3 node 1 262654 7.688228 3.216090 0.0 75.0 S3 node 2 262654 7.414089 2.912508 0.0 34.0 S3 node 3 262654 6.632166 2.751295 0.0 40.0
)
)
)
Statistics: IMAGE NPIX MEAN RMS MIN MAX ACIS_total 6004901 2711.931 3434.352 0.0 167725 I2 node 0 262654 2357.438643 478.542886 505.0 15508.0 I2 node 1 262654 2485.150565 702.210080 514.0 165719.0 I2 node 2 262654 2512.276744 533.012951 539.0 17046.0 I2 node 3 262654 2516.497554 653.413086 500.0 36056.0 I3 node 0 262654 2710.030581 668.795972 501.0 15030.0 I3 node 1 262654 2792.930349 1754.117878 526.0 56036.0 I3 node 2 262654 2501.713758 468.798303 493.0 15261.0 I3 node 3 262654 2479.793420 507.159407 467.0 35915.0 S2 node 0 262654 3162.844937 511.326259 1707.0 22598.0 S2 node 1 262654 3359.771055 766.083318 1886.0 19354.0 S2 node 2 262654 3726.556407 772.121715 2296.0 33323.0 S2 node 3 262654 3683.504976 626.445236 2024.0 84362.0 S3 node 0 262654 5599.323070 3019.610101 2461.0 55096.0 S3 node 1 262654 6819.548491 2397.243792 0.0 83602.0 S3 node 2 262654 5555.838101 1372.212721 2595.0 27597.0 S3 node 3 262654 4367.936407 778.422460 2632.0 26709.0
)
|
)
|
)
|
)
|
| Aug 2024 | May 2024 | Feb 2024 | Nov 2023 |
|---|
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
Nov 2024 Focal Temperature
| The Mean (max) FPT: | |
|---|---|
| -107.53 | +/- 7.69 C |
| Mean Width: | |
| 0.8 | +/- 0.58 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 |
The following three plots show trends of SIB from year 2000. CCDs shown here are CCD3, CCD5, and CCD7. Fitted lines are linear fit after eliminating extreme outliers. For >10 keV plots, 2 lines are fit. One is with a 13 keV filter, and another without.
CCD 3
CCD 5
CCD 7
ACIS Histogram Mode Trends
We collected data from acis histogram mode data, and created trend plots of peak portions and peak widths against time (DOM). The peaks were estimated by fitting a simple Gaussian on three peaks (Al, Ti, and Mn), and the widths were estimated by a width at the half max from the peak.
All histogram data are taken under TIMED and GRADED_HIST mode, SIM position is at an external calibration source position, the focal temperature is around -119.7 C, and parameter settings in aciselec, acistemp are set to about same for all.
CCD 3, Peak Position
CCD 3, Peak Widths
CCD 3, Count Rates
HRC
DOSE of Central 4K Pore-Pairs
Please refer to Maximum Dose Trends for more details.
)
|
|---|
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_11_2024.fits 16777216 0.043 0.209 0.000 7.000
)
IMAGE NPIX MEAN STDDEV MIN MAX HRCI_08_1999_11_2024.fits 16777216 na na na na
)
|
|---|
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_11_2024.fits 16777216 0.007 0.084 0.000 3.000
)
IMAGE NPIX MEAN STDDEV MIN MAX HRCS_08_1999_11_2024.fits 16777216 na na na na
|
|
Max dose trend plots corrected for events that "pile-up"
in the center of the taps due to bad position information.
|
)
|
)
|
)
|
)
|
| Aug 2024 | May 2024 | Feb 2024 | Nov 2023 |
|---|
)
|
)
|
)
|
)
|
| Aug 2024 | May 2024 | Feb 2024 | Nov 2023 |
|---|
Gratings
Grating Trends/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 Trends pages.
PCAD
ACA Trending
| ACIS |
)
|
)
|
)
|
|
|---|---|---|---|---|
)
|
)
|
)
| ||
| HRCI |
)
|
)
|
)
|
)
|
| HRCI |
)
|
)
|
)
|
)
|
Gyro Bias Drift
Radiation History
Radiation Count Rates of Nov 2024
Sun Spot History (See:NOAA Page)
Trending
Quarterly Trends
- HRMA Heater
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| ohrthr03 | 2.306e-04 | 3.101e-05 | (2.95+/-0.00)e2 | 0.04 +/- 0.01 | K | RT 5: HRMA FORWARD APERTURE PLATE | |
|---|---|---|---|---|---|---|---|
| ohrthr09 | 8.754e-04 | 1.737e-04 | (2.96+/-0.00)e2 | 0.31 +/- 0.05 | K | RT 105: HRMA CAP | |
| ohrthr17 | 9.394e-04 | 1.848e-04 | (2.96+/-0.00)e2 | 0.33 +/- 0.06 | K | RT 125: HSA OUTER CYNLINDER | |
| ohrthr24 | 0.002 | 3.337e-04 | (2.97+/-0.01)e2 | 0.64 +/- 0.14 | K | RT 12: HRMA AFT HEATER PLATE | |
| ohrthr38 | 0.006 | 8.678e-04 | (3.01+/-0.02)e2 | 1.27 +/- 0.49 | K | RT 120: HRMA AFT COLLIMATOR OUTER CYLINDER | |
| ohrthr52 | 8.998e-04 | 1.806e-04 | (2.96+/-0.00)e2 | 0.33 +/- 0.06 | K | RT 100: HRMA CAP | |
- HRMA Thermal
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| 4rt568t | 0.006 | 9.319e-04 | (3.00+/-0.02)e2 | 1.26 +/- 0.53 | K | RT 568 - HRMA TEMP | |
|---|---|---|---|---|---|---|---|
| 4rt569t | 0.002 | 2.987e-04 | (2.97+/-0.01)e2 | 0.64 +/- 0.12 | K | RT 569 - HRMA TEMP | |
| 4rt570t | 0.001 | 1.639e-04 | (2.96+/-0.00)e2 | 0.31 +/- 0.06 | K | RT 570 - HRMA TEMP | |
| 4rt575t | 0.008 | 0.001 | (3.06+/-0.03)e2 | 1.55 +/- 0.67 | K | RT 575 - OB CONE TEMP | |
| 4rt576t | 0.007 | 9.279e-04 | (2.96+/-0.02)e2 | 1.40 +/- 0.53 | K | RT 576 - OB CONE TEMP | |
| 4rt578t | 0.009 | 0.002 | (3.04+/-0.04)e2 | 1.66 +/- 0.87 | K | RT 578 - OB CONE TEMP | |
- MUPS
| Previous Quarter | |||||||
| MSID | MEAN | RMS | DELTA/YR | DELTA/YR/YR | UNITS | DESCRIPTION | |
| pm1thv1t | 0.016 | 0.007 | (3.52+/-0.16)e2 | -1.18 +/- 2.51 | K | MUPS 1 THRUSTER VALVE 01 TEMP | |
|---|---|---|---|---|---|---|---|
| pline02t | 0.023 | 0.005 | (3.36+/-0.12)e2 | 0.78 +/- 2.28 | K | PROP LINE TEMP 02 | |
| pline03t | 0.025 | 0.006 | (3.29+/-0.14)e2 | 0.57 +/- 2.15 | K | PROP LINE TEMP 03 | |
| pline04t | 0.023 | 0.005 | (3.17+/-0.11)e2 | 2.82 +/- 2.29 | K | PROP LINE TEMP 04 | |
Spacecraft Motions
TSC and FA Cummulative Moter Distance
HETG and LETG Cummulative Insertion Counts
HETG/LETG Insertion/Retraction Angle
Reaction Wheel Rotations
