ASTROSAT CZTI

Data Quality Report

Orbit 20190922_A05_166T01_9000003192_level2

Creation date: 2025-12-03T21:28:54.547616
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/AS1A05_166T01_9000003192cztM0_level2.fits modeM0/AS1A05_166T01_9000003192cztM0_level2_quad_clean.evt
Size (bytes)604,186,560514,964,160
Size576.2 MB 491.1 MB
Events in quadrant A3,785,7033,029,567
Events in quadrant B3,595,0623,016,054
Events in quadrant C3,693,0602,936,020
Events in quadrant D3,177,9262,567,068

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01230600
B01285920
C01295990
D01645530

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012020
B011980
C012040
D012000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A590134820.816769%
B590286941.175713%
C5886010121.719334%
D5898824174.097444%

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 73279 59475 0 0 0.00% 0.00%
B 73278 59506 0 0 0.00% 0.00%
C 73279 59392 0 0 0.00% 0.00%
D 73279 59428 0 0 0.00% 0.00%

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 29 3678 11.48 985 932 239.1
A 7 110 2982 8.57 985 932 239.1
A 0 30 2844 7.99 985 932 239.1
B 2 9 2838 10.41 954 917 184.5
B 5 128 2363 7.84 954 917 184.5
B 2 8 2343 7.73 954 917 184.5
C 3 126 2549 6.62 975 919 246.2
C 7 111 2489 6.38 975 919 246.2
C 2 191 2475 6.32 975 919 246.2
D 10 189 2261 5.97 909 833 239.1
D 6 231 2252 5.93 909 833 239.1
D 3 14 2248 5.92 909 833 239.1

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