ASTROSAT CZTI

Data Quality Report

Orbit 20200606_A09_061T02_9000003708_level2

Creation date: 2021-01-10T19:34:51.902312
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/AS1A09_061T02_9000003708cztM0_level2_bc.evt modeM0/AS1A09_061T02_9000003708cztM0_level2_quad_clean.evt
Size (bytes)1,079,000,640487,664,640
Size1.0 GB 465.1 MB
Events in quadrant A8,474,0303,404,295
Events in quadrant B6,015,0793,428,935
Events in quadrant C5,691,7463,235,787
Events in quadrant D10,984,4073,177,089

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04500
B04500
C04500
D04500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0594770
B0499030
C0502040
D0653650

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A221854552.050935%
B221854391.978815%
C221856322.848772%
D221858223.705206%

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 27149 22182 6 6 0.02% 0.03%
B 27149 22181 0 0 0.00% 0.00%
C 27149 22181 3 3 0.01% 0.01%
D 27149 22182 291 291 1.07% 1.31%

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 2881073 9550.86 1420 1406 301.5
A 15 173 70938 230.61 1420 1406 301.5
A 3 1 54378 175.69 1420 1406 301.5
B 3 112 171412 654.44 1415 1396 259.8
B 0 229 160251 611.48 1415 1396 259.8
B 7 219 86548 327.77 1415 1396 259.8
C 7 87 405533 1300.56 1330 1336 310.8
C 3 233 152671 486.94 1330 1336 310.8
C 9 54 15626 45.98 1330 1336 310.8
D 1 52 3448157 10995.7 1374 1340 313.5
D 8 195 1812715 5778.47 1374 1340 313.5
D 9 35 162707 514.78 1374 1340 313.5

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