ASTROSAT CZTI

Data Quality Report

Orbit 55869

Creation date: 2026-01-25T09:05:42.478431
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_030T02_9000006544_55869cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55869cztM0_level2_quad_clean.evt
Size (bytes)567,406,08080,605,440
Size541.1 MB 76.9 MB
Events in quadrant A8,619,505395,402
Events in quadrant B2,924,383608,680
Events in quadrant C4,958,728498,119
Events in quadrant D3,991,620480,811

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0301752
B0138642
C0195482
D0169482

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6558172726.334248%
B6558590.899665%
C655865810.033547%
D65582964.513571%

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 7892 6742 1803 1803 22.85% 26.74%
B 7892 6803 20 20 0.25% 0.29%
C 7892 6803 532 532 6.74% 7.82%
D 7892 6803 231 231 2.93% 3.40%

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 12 115 5719658 38141.24 607 593 149.9
A 7 64 137535 913.29 607 593 149.9
A 4 249 98829 655.15 607 593 149.9
B 5 172 81121 558.32 671 647 144.1
B 7 252 61296 420.78 671 647 144.1
B 5 185 38994 266.05 671 647 144.1
C 15 199 1288185 7552.61 625 619 170.5
C 13 3 533918 3128.22 625 619 170.5
C 6 223 190967 1116.54 625 619 170.5
D 15 125 679831 3722.03 642 612 182.5
D 11 129 447412 2448.41 642 612 182.5
D 2 153 80574 438.18 642 612 182.5

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