ASTROSAT CZTI

Data Quality Report

Orbit 20210807_A10_094T13_9000004628_level2

Creation date: 2021-08-11T10:37:06.371097
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/AS1A10_094T13_9000004628cztM0_level2_bc.evt modeM0/AS1A10_094T13_9000004628cztM0_level2_quad_clean.evt
Size (bytes)725,754,240257,918,400
Size692.1 MB 246.0 MB
Events in quadrant A3,874,4661,687,114
Events in quadrant B7,672,0841,702,704
Events in quadrant C4,313,5241,697,547
Events in quadrant D5,061,5611,657,713

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03140
B03140
C03140
D03140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0347310
B0482630
C0353300
D0372020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A154614432.865274%
B154614562.949356%
C154614192.710045%
D154613712.399586%

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 16176 15461 4 4 0.02% 0.03%
B 16176 15461 3 3 0.02% 0.02%
C 16176 15461 14 14 0.09% 0.09%
D 16176 15461 20 20 0.12% 0.13%

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 0 13 849656 5027.7 762 748 168.8
A 4 48 45308 263.91 762 748 168.8
A 13 254 27211 156.73 762 748 168.8
B 6 159 3994091 26523.95 772 754 150.6
B 4 80 476963 3163.0 772 754 150.6
B 0 229 47524 310.65 772 754 150.6
C 3 233 836373 4493.17 758 754 186.0
C 0 10 376215 2018.87 758 754 186.0
C 10 22 145794 779.89 758 754 186.0
D 8 195 1490041 8210.86 766 740 181.4
D 13 249 359322 1976.95 766 740 181.4
D 2 250 157384 863.61 766 740 181.4

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