ASTROSAT CZTI

Data Quality Report

Orbit 55722

Creation date: 2026-01-17T14:44:21.673524
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_099T04_9000006540_55722cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55722cztM0_level2_quad_clean.evt
Size (bytes)773,467,20079,758,720
Size737.6 MB 76.1 MB
Events in quadrant A8,475,925506,164
Events in quadrant B3,372,137700,893
Events in quadrant C9,271,195246,631
Events in quadrant D7,003,188504,320

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0296292
B0145032
C0320682
D0253942

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6554174526.624962%
B65551111.693364%
C6555416263.493516%
D6555117017.848970%

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 7714 6555 1603 1603 20.78% 24.45%
B 7715 6556 1 1 0.01% 0.02%
C 7715 6553 1900 1900 24.63% 28.99%
D 7715 6556 1053 1053 13.65% 16.06%

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 12 115 2994860 18724.89 656 642 159.9
A 15 32 2611105 16325.01 656 642 159.9
A 8 192 153428 955.48 656 642 159.9
B 4 206 491779 3204.3 717 690 153.3
B 12 111 18390 115.49 717 690 153.3
B 11 111 17676 110.83 717 690 153.3
C 15 199 7581083 79087.36 341 339 95.9
C 14 96 81520 846.93 341 339 95.9
C 10 22 76032 789.68 341 339 95.9
D 11 129 3794546 20969.95 643 615 180.9
D 8 245 287900 1587.89 643 615 180.9
D 10 181 275775 1520.87 643 615 180.9

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