ASTROSAT CZTI

Data Quality Report

Orbit 20200505_A08_003T13_9000003646_level2

Creation date: 2020-05-09T20:51:15.164358
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A08_003T13_9000003646cztM0_level2_bc.evt modeM0/AS1A08_003T13_9000003646cztM0_level2_quad_clean.evt
Size (bytes)1,692,112,320570,859,200
Size1.6 GB 544.4 MB
Events in quadrant A10,513,1963,662,886
Events in quadrant B10,280,9163,741,526
Events in quadrant C10,487,0693,498,783
Events in quadrant D16,897,0783,300,276

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09180
B09180
C09180
D09180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0961170
B0952240
C0970880
D01171160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A449728541.898959%
B449727831.741083%
C449729862.192475%
D4497221264.727386%

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 52717 44974 57 57 0.11% 0.13%
B 52717 44972 3 3 0.01% 0.01%
C 52717 44975 52 52 0.10% 0.12%
D 52717 44973 635 635 1.20% 1.41%

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 6 16 666020 1227.17 2533 2493 540.7
A 13 254 64426 114.54 2533 2493 540.7
A 4 2 61233 108.64 2533 2493 540.7
B 4 80 116675 239.28 2578 2521 477.1
B 7 202 96216 196.39 2578 2521 477.1
B 0 190 79330 161.0 2578 2521 477.1
C 7 247 375937 666.54 2419 2411 560.4
C 2 16 359641 637.46 2419 2411 560.4
C 5 112 292822 518.22 2419 2411 560.4
D 1 52 2742289 4950.83 2411 2328 553.4
D 7 238 2665106 4811.37 2411 2328 553.4
D 8 195 2030987 3665.58 2411 2328 553.4

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