- M&TA MONTHLY REPORT -

1. Configuration
2. ACIS
   1. Dose
   2. CTI
   3. Focal Plane Temperature
   4. Bad Pixels
   5. Background
3. HRC - Dose
4. Gratings - Focus
5. PCAD
   1. Gyro bias drift
   2. Science Instrument Positional Change Monitoring
6. Radiation Zone Timing
7. Quarterly Trends
8. Spacecraft Motions

Configuration/Radiation Overview for Feb 2008

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.
  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.

  • FEB registered-photon-map in fits
    

    Statistics:
    # IMAGE     NPIX        MEAN           RMS              MIN     MAX
    ACIS_feb08 6004901      10.9420        15.2577          0.0     790.0
    
     I2 node 0  262654      10.868805       3.985890        0.0      65.0
     I2 node 1  262654      11.606600       4.411571        0.0      52.0
     I2 node 2  262654      11.638069       4.167260        0.0     168.0
     I2 node 3  262654      11.317832       4.287614        0.0      61.0
    
     I3 node 0  262654      11.946343       4.630326        0.0      61.0
     I3 node 1  262654      12.357471       11.249824       0.0     251.0
     I3 node 2  262654      11.290016       4.035000        0.0      96.0
     I3 node 3  262654      11.373989       4.125694        0.0     216.0
    
     S2 node 0  262654      14.496913       4.646153        0.0      67.0
     S2 node 1  262654      14.688671       5.332230        0.0      94.0
     S2 node 2  262654      15.578546       5.022525        0.0     124.0
     S2 node 3  262654      14.533763       4.402253        0.0     428.0
    
     S3 node 0  262654      19.309999       8.045443        2.0     115.0
     S3 node 1  262654      19.162516       5.503922        0.0      91.0
     S3 node 2  262654      18.798545       4.575917        0.0      66.0
     S3 node 3  262654      17.521320       4.378336        1.0     101.0
    
    

  • Jul 1999 - Feb 2008 registered-photon-map in fits
    

    
    Statistics:
     IMAGE        NPIX      MEAN          RMS              MIN    MAX
    ACIS_total  6004901    1115.871         1532.682        0.0    67063.0
    
     I2 node 0  262654      835.619202      148.663491      0.0     3664.0
     I2 node 1  262654      883.434737      203.322359      0.0     12856.0
     I2 node 2  262654      899.570934      173.552983      0.0     3560.0
     I2 node 3  262654      902.138831      216.390273      0.0     4228.0
    
     I3 node 0  262654      953.237262      235.582308      0.0     5330.0
     I3 node 1  262654      986.870579      693.370527      0.0     18459.0
     I3 node 2  262654      875.132165      148.404918      0.0     3659.0
     I3 node 3  262654      864.227413      159.197395      0.0     16045.0
    
     S2 node 0  262654      1314.181422     164.986372      633.0   12800.0
     S2 node 1  262654      1396.751124     284.240999      670.0   7120.0
     S2 node 2  262654      1566.541536     300.189591      877.0   10152.0
     S2 node 3  262654      1515.972811     231.986650      861.0   17707.0
    
     S3 node 0  262654      2404.085107     1262.019317     955.0   10769.0
     S3 node 1  262654      3608.603229     1773.359564     0.0     11703.0
     S3 node 2  262654      2611.449226     799.665305      835.0   5742.0
     S3 node 3  262654      1938.305645     318.657815      1013.0  7876.0
    
    

  • FEB 2008 dose PNG image
    
  • FEB I3 dose PNG image
    
  • FEB S3 dose PNG image
    
  • TOTAL JUL 1999 - FEB 2008 dose PNG image
    
  • TOTAL I3 dose PNG image
    
  • TOTAL S3 dose PNG image
    
  
  
• Integrated Exposure Maps of Last 12 Months
  

  Nov 2007	Aug 2007	May 2007	Feb 2007

  
  
  
• 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

    
         The Mean (max) FPT: -116.09 C    std dev: 2.27
                 mean width:    0.82 days std dev: 0.64
  

  
  
  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.
  
  
  

  The following is a plot of focal plane temperature and sun angle, earth 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)
  

• Acis Count Rate Plot This monitors the ACIS count Rate vs. EPHIN count Rate.
  No sources or CTI observations are removed. For daily updates see: Ephin/Acis Info




• Science instrument background rates
  This page shows scientific instrument background data based on Acis observations. A source region file is generated using get_srcregions and then the input event file is filtered using the regions in that file to remove the sources.
  
  

  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

  
  
  
  
  
  
  TOP
  

HRC

DOSE of central 4K pore-pairs



• FEB HRC-I dose fits image

          IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
  HRCI_02_2008.fits          16777216   0.030    0.175       0.0       7.0 
  

  
  
• AUG 1999 - FEB 2008 HRC-I dose fits image

          IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
  HRCI_08_1999_02_2008.fits  16777216   2.495    3.487       0.0       289.0
  

  
  
• FEB HRC-S dose fits image - no observations
  
• AUG 1999 - FEB 2008 HRC-S dose fits image

          IMAGE                NPIX     MEAN      STDDEV      MIN      MAX
  HRCS_08_1999_02_2008.fits  16777216  8.767     16.892       0.0      1545.0
  

  
  
• FEB HRC-I dose PNG image
  
• AUG 1999 - FEB 2008 HRC-I dose PNG image
  
• FEB HRC-S dose PNG image
• AUG 1999 - FEB 2008 HRC-S dose PNG image
  
  
  See Maximum Dose Trends
  

  We display a max dose trend plot corrected for events that "pile-up" in the center of the taps due to bad position information.

  
  
• Integrated Exposure Maps of Last 12 Months: HRCI
  

  Nov 2007	Aug 2007	May 2007	Feb 2007

  
  
• Integrated Exposure Maps of Last 12 Months: HRCS
  

  Nov 2007	Aug 2007	May 2007	Feb 2007

  
  TOP

• 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.
  
  
  

ACA Trending - Entire Period
FEB Trending - Jan 2008




Gyro Bias Drift



Science Instrument Positional Change Monitoring

ACIS-S and HRC Celestial Location 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).

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).



January 2008 Timing Plots       Entire Mission Timing Plots

Quarterly Trends

• ACIS Electronics B

  Previous Quarter
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  1DAHBCU	0.41	0.16	-3.604e-01	-8.687e-01	AMP	DA HEATER CURRENT B
  1DAHBVO	5.61	2.14	-4.962e+00	-8.055e+00	V	DA HEATER VOLTAGE B
  1DAHHBVO	28.49	0.32	2.672e+00	-8.796e+00	V	DA HOUSING HEATER INPUT VOLTAGE B
  1DE28BVO	28.67	0.17	1.331e+00	1.210e+01	V	DEA +28V INPUT B
  1DEICBCU	16.40	2.434e-02	2.035e-02	-8.964e-01	AMP	DEA INPUT CURRENT B

  
  
• EPHIN Temperatures and Voltages

  Previous Quarter
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  HKEBIASLEAKI	44.73	1.41	2.209e-01	5.516e+00	uA	EPHIN HOUSEKEEPING E-BIAS: LEAKAGE CURRENT (5EHSE800)
  HKEBOXTEMP	317.91	3.45	-1.434e-01	-3.674e+01	K	EPHIN HOUSEKEEPING EBOX: TEMPERATURE (5EHSE300)
  HKFBIASLEAKI	2.22	0.84	3.294e+00	-1.056e+02	uA	EPHIN HOUSEKEEPING F-BIAS: LEAKAGE CURRENT (5EHSE900)
  HKP27I	7.14	0.18	1.946e-01	-5.575e+00	AMP	HK 27 Volts Rail - Current
  HKP27V	26.24	2.20	1.246e+01	-3.616e+02	V	HK 27 Volts Rail - Voltage

  
  
• HRC Thermal

  Previous Quarter
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  2CEAHVPT	298.13	1.84	3.309e+00	5.433e+00	K	CEA RADIATOR TEMPERATURE AT CENTER
  2CHTRPZT	294.47	1.74	3.829e+00	5.195e+01	K	CENTRAL ELECTRONICS BOX TEMP
  2CONDMXT	290.54	1.61	3.428e+00	4.947e+01	K	CONDUIT -X FACE TEMPERATURE
  2DCENTRT	290.87	1.75	3.895e+00	1.142e+02	K	DETECTOR HOUSING TEMP 2
  2DTSTATT	291.38	1.53	3.649e+00	1.094e+02	K	DETECTOR HOUSING TEMP 1
  2FHTRMZT	293.20	1.46	3.470e+00	8.904e+01	K	FRONT END ELECTRONICS BOX TEMPERATURE
  2FRADPYT	288.88	1.40	3.210e+00	7.788e+01	K	FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP
  2PMT1T	292.15	2.34	5.906e+00	1.167e+02	K	PMT 1 TEMPERATURE
  2PMT2T	294.61	2.72	5.875e+00	1.150e+02	K	PMT 2 TEMPERATURE
  2UVLSPXT	287.52	2.27	4.466e+00	1.445e+02	K	UV LIGHT SHIELD NEXT TO SNOUT TEMP

  
  
• SIM Electronics

  Previous Quarter
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  AGRNDADC	3.400e-04	2.894e-04	-7.087e-04	-1.519e-02	V	Analog ground A/D convert reading
  FATABADC	4.99	3.545e-04	-1.105e-04	1.613e-02	Converter	FA Tab Position Sensor A/D
  N15VADC	-15.01	3.617e-04	-6.912e-04	6.674e-03	Reading	-15V Power Supply A/D Converter
  P15VADC	14.96	5.403e-04	-1.030e-03	-4.323e-02	Reading	+5V Power Supply A/D Converter
  P5VADC	4.95	3.511e-03	1.280e-02	2.498e-01	Reading	+5V Power Supply A/D Converter
  TSCTABADC	4.99	4.409e-04	-7.814e-05	1.850e-02	converter	TSC Tab Position Sensor A/D