ASTROSAT CZTI

Data Quality Report

Orbit 55170

Creation date: 2025-12-09T08:21:53.118278
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_022T16_9000006532_55170cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55170cztM0_level2_quad_clean.evt
Size (bytes)512,976,960113,051,520
Size489.2 MB 107.8 MB
Events in quadrant A5,748,262725,620
Events in quadrant B3,878,441798,103
Events in quadrant C4,555,136704,865
Events in quadrant D4,214,665663,950

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0225012
B0173812
C0188622
D0180602

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76243935.154774%
B76252252.950820%
C76252042.675410%
D76251271.665574%

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 9944 7626 381 381 3.83% 5.00%
B 9945 7627 34 34 0.34% 0.45%
C 9945 7627 170 170 1.71% 2.23%
D 9945 7627 107 107 1.08% 1.40%

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 78 1308653 6428.8 814 794 203.4
A 12 115 965164 4740.37 814 794 203.4
A 0 8 171968 841.41 814 794 203.4
B 4 81 288446 1634.58 815 786 176.0
B 2 249 223966 1268.18 815 786 176.0
B 0 182 66507 373.45 815 786 176.0
C 10 22 565369 2583.3 798 791 218.5
C 1 16 248499 1133.42 798 791 218.5
C 13 3 201678 919.18 798 791 218.5
D 11 129 747855 3321.51 792 758 224.9
D 11 176 149580 661.64 792 758 224.9
D 7 129 77315 340.36 792 758 224.9

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