ASTROSAT CZTI

Data Quality Report

Orbit 55594

Creation date: 2026-01-07T22:29:31.372507
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_021T06_9000006538_55594cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55594cztM0_level2_quad_clean.evt
Size (bytes)494,475,84093,674,880
Size471.6 MB 89.3 MB
Events in quadrant A3,746,326627,712
Events in quadrant B2,981,398679,146
Events in quadrant C7,102,429494,813
Events in quadrant D3,944,655560,514

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163652
B0142501
C0257121
D0167111

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68041552.278072%
B6805570.837619%
C6805127818.780309%
D68051432.101396%

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 7529 6805 70 70 0.93% 1.03%
B 7530 6806 17 17 0.23% 0.25%
C 7530 6806 1091 1091 14.49% 16.03%
D 7530 6806 91 91 1.21% 1.34%

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 8 249 605848 3540.58 693 675 170.9
A 12 115 254074 1482.52 693 675 170.9
A 3 14 65515 379.35 693 675 170.9
B 1 159 87315 599.68 683 660 144.5
B 4 169 68016 466.13 683 660 144.5
B 10 247 25667 173.06 683 660 144.5
C 9 38 3839649 22528.96 620 612 170.4
C 6 223 651574 3820.1 620 612 170.4
C 13 3 66892 388.96 620 612 170.4
D 15 125 361707 1900.97 671 640 189.9
D 3 12 226775 1190.57 671 640 189.9
D 2 249 177541 931.36 671 640 189.9

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