ASTROSAT CZTI

Data Quality Report

Orbit 20220106_T04_088T01_9000004846_level2

Creation date: 2022-01-08T13:52:21.005422
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1T04_088T01_9000004846cztM0_level2_bc.evt modeM0/AS1T04_088T01_9000004846cztM0_level2_quad_clean.evt
Size (bytes)2,507,204,160583,375,680
Size2.3 GB 556.4 MB
Events in quadrant A14,357,7183,549,505
Events in quadrant B14,960,1943,748,708
Events in quadrant C14,441,7243,698,185
Events in quadrant D29,032,9443,503,647

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09440
B09440
C09440
D09440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01215280
B01137060
C01063120
D01578260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4615737858.200273%
B4615714803.206448%
C461577321.585892%
D4615726025.637281%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 64623 45877 72 72 0.11% 0.16%
B 64624 46156 102 102 0.16% 0.22%
C 64624 46157 60 60 0.09% 0.13%
D 64624 46156 519 519 0.80% 1.12%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 169 4881034 9318.71 2390 2366 523.5
A 13 6 105601 197.19 2390 2366 523.5
A 13 254 71856 132.73 2390 2366 523.5
B 5 172 3419375 7066.71 2463 2418 483.5
B 0 219 291654 598.18 2463 2418 483.5
B 0 190 283295 580.89 2463 2418 483.5
C 15 214 1893948 3508.12 2393 2383 539.2
C 0 10 1151790 2131.7 2393 2383 539.2
C 3 233 676310 1249.87 2393 2383 539.2
D 8 195 9702934 15519.96 2399 2333 625.0
D 1 52 3325520 5316.76 2399 2333 625.0
D 2 250 1853086 2961.01 2399 2333 625.0

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter