ASTROSAT CZTI

Data Quality Report

Orbit 35955

Creation date: 2022-06-09T05:13:48.366172
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/AS1A11_080T01_9000005146_35955cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35955cztM0_level2_quad_clean.evt
Size (bytes)637,585,92055,981,440
Size608.0 MB 53.4 MB
Events in quadrant A2,895,025417,674
Events in quadrant B10,343,397204,895
Events in quadrant C2,871,000371,819
Events in quadrant D2,894,725382,906

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182
B0183
C0201
D0192

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01067
B01057
C0995
D010710

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129421481
B0411297575
C0147503437
D0132121483

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A46441593.423773%
B4186407397.300526%
C44901804.008909%
D46121102.385082%

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 7206 4883 98 98 1.36% 2.01%
B 7203 4495 3723 3723 51.69% 82.83%
C 7206 4767 58 58 0.80% 1.22%
D 7206 4868 81 81 1.12% 1.66%

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 560831 4844.22 567 558 115.7
A 10 83 123759 1065.22 567 558 115.7
A 13 6 9611 78.27 567 558 115.7
B 5 14 2990230 55297.06 273 267 54.1
B 5 31 2985459 55208.83 273 267 54.1
B 5 15 2980061 55109.0 273 267 54.1
C 9 187 594623 4886.67 521 526 121.6
C 15 214 183502 1505.04 521 526 121.6
C 0 207 33822 273.87 521 526 121.6
D 2 253 257977 1921.98 541 528 133.9
D 13 249 112825 838.35 541 528 133.9
D 1 52 108589 806.73 541 528 133.9

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