ASTROSAT CZTI

Data Quality Report

Orbit 57746

Creation date: 2026-05-31T15:45:39.446085
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_083T16_9000006580_57746cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57746cztM0_level2_quad_clean.evt
Size (bytes)534,948,480112,682,880
Size510.2 MB 107.5 MB
Events in quadrant A4,170,074740,009
Events in quadrant B3,921,048791,047
Events in quadrant C6,764,553668,298
Events in quadrant D4,334,982665,643

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01562
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01830578
B01730061
C02557161
D01851363

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A031
B030
C032
D031

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78672463.126986%
B78732793.543757%
C78717479.490535%
D78702022.566709%

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 7888 7882 98 98 1.24% 1.24%
B 7891 7887 37 37 0.47% 0.47%
C 7890 7885 483 483 6.12% 6.13%
D 7887 7882 118 118 1.50% 1.50%

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 10 251 653363 3097.35 849 824 210.7
A 7 160 93785 441.25 849 824 210.7
A 4 249 58806 275.22 849 824 210.7
B 0 63 123548 686.09 844 810 178.9
B 8 128 76152 421.15 844 810 178.9
B 5 185 68667 379.31 844 810 178.9
C 15 224 1767617 8099.19 810 801 218.1
C 9 38 1205291 5521.46 810 801 218.1
C 12 2 257165 1175.19 810 801 218.1
D 8 240 228675 977.61 831 792 233.1
D 2 153 195992 837.41 831 792 233.1
D 3 12 138708 591.66 831 792 233.1

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