ASTROSAT CZTI

Data Quality Report

Orbit 20210211_A10_097T04_9000004170_level2

Creation date: 2021-02-13T10:17:32.948250
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/AS1A10_097T04_9000004170cztM0_level2_bc.evt modeM0/AS1A10_097T04_9000004170cztM0_level2_quad_clean.evt
Size (bytes)2,439,884,160864,426,240
Size2.3 GB 824.4 MB
Events in quadrant A14,950,5075,581,481
Events in quadrant B14,120,1195,719,968
Events in quadrant C13,814,6345,396,316
Events in quadrant D26,681,8725,131,562

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012880
B012880
C012880
D012880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0970
C0980
D0980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01370540
B01351610
C01347790
D01749880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6349113252.086910%
B6349512211.922986%
C6348314002.205315%
D6349025123.956529%

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 72108 63488 427 427 0.59% 0.67%
B 72108 63491 4 4 0.01% 0.01%
C 72108 63483 9 9 0.01% 0.01%
D 72109 63487 263 263 0.36% 0.41%

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 1 113 1606627 2163.19 3441 3388 741.1
A 13 254 95693 124.54 3441 3388 741.1
A 13 6 38508 47.39 3441 3388 741.1
B 10 246 283793 427.04 3513 3432 656.5
B 0 190 112681 166.41 3513 3432 656.5
B 0 183 87275 127.71 3513 3432 656.5
C 3 233 494965 628.28 3335 3322 782.5
C 2 16 355360 449.87 3335 3322 782.5
C 2 114 119137 148.0 3335 3322 782.5
D 8 195 6317462 8413.27 3315 3207 750.5
D 1 52 5395981 7185.47 3315 3207 750.5
D 7 80 1449199 1926.68 3315 3207 750.5

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