ASTROSAT CZTI

Data Quality Report

Orbit 56420

Creation date: 2026-03-03T10:17:26.648096
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_083T05_9000006554_56420cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56420cztM0_level2_quad_clean.evt
Size (bytes)825,897,60080,533,440
Size787.6 MB 76.8 MB
Events in quadrant A12,172,426331,854
Events in quadrant B6,464,993560,946
Events in quadrant C3,166,767600,237
Events in quadrant D8,277,504501,871

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0403981
B0235281
C0139932
D0290141

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6350332552.362205%
B6350138421.795276%
C6350721.133858%
D635077712.236220%

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 7495 6350 3339 3339 44.55% 52.58%
B 7495 6350 883 883 11.78% 13.91%
C 7495 6351 29 29 0.39% 0.46%
D 7495 6350 830 830 11.07% 13.07%

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 12 3 5253546 42196.36 496 484 124.5
A 4 95 3595289 28876.05 496 484 124.5
A 12 194 667136 5355.03 496 484 124.5
B 4 206 3220736 24250.96 623 600 132.8
B 10 247 562002 4227.94 623 600 132.8
B 0 63 48205 358.51 623 600 132.8
C 15 147 194140 1034.53 686 680 187.0
C 12 254 144889 771.16 686 680 187.0
C 12 249 46784 246.54 686 680 187.0
D 8 129 4471916 24976.0 634 606 179.0
D 5 113 420520 2345.57 634 606 179.0
D 5 32 308524 1719.98 634 606 179.0

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