ASTROSAT CZTI

Data Quality Report

Orbit 55944

Creation date: 2026-02-05T16:30:59.979868
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/AS1A14_066T02_9000006546_55944cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55944cztM0_level2_quad_clean.evt
Size (bytes)448,099,200110,321,280
Size427.3 MB 105.2 MB
Events in quadrant A3,837,716709,511
Events in quadrant B3,514,796766,402
Events in quadrant C4,420,525676,168
Events in quadrant D4,210,349649,115

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172460
B0163650
C0188090
D0183000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77591842.371440%
B77591431.843021%
C77592573.312283%
D77601281.649485%

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 7759 7759 65 65 0.84% 0.84%
B 7759 7759 4 4 0.05% 0.05%
C 7759 7759 150 150 1.93% 1.93%
D 7760 7760 95 95 1.22% 1.22%

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 3 14 490156 2361.8 845 822 207.2
A 4 3 19753 91.37 845 822 207.2
A 0 8 17060 78.37 845 822 207.2
B 7 252 44543 239.62 841 810 182.5
B 4 21 37084 198.75 841 810 182.5
B 9 251 33812 180.83 841 810 182.5
C 13 3 366935 1639.73 815 807 223.3
C 6 223 321126 1434.57 815 807 223.3
C 12 252 261635 1168.13 815 807 223.3
D 11 129 596435 2570.76 818 782 231.7
D 1 31 129738 556.56 818 782 231.7
D 5 173 57246 243.69 818 782 231.7

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