ASTROSAT CZTI

Data Quality Report

Orbit 55890

Creation date: 2026-01-26T19:50:53.521585
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_55890cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55890cztM0_level2_quad_clean.evt
Size (bytes)795,283,200127,912,320
Size758.4 MB 122.0 MB
Events in quadrant A6,155,249862,533
Events in quadrant B4,490,172957,000
Events in quadrant C11,757,749576,883
Events in quadrant D6,274,205796,147

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01960
B01960
C01960
D01960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0249260
B0208570
C0422790
D0255780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A98153203.260316%
B98161001.018745%
C9816327333.343521%
D98161591.619804%

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 9815 9815 281 281 2.86% 2.86%
B 9816 9816 37 37 0.38% 0.38%
C 9816 9816 2976 2976 30.32% 30.32%
D 9816 9816 139 139 1.42% 1.42%

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 1091726 4489.02 985 961 243.0
A 7 64 742525 3051.89 985 961 243.0
A 15 32 350683 1439.27 985 961 243.0
B 0 199 149822 694.69 997 961 214.3
B 0 153 139933 648.54 997 961 214.3
B 7 0 73242 337.31 997 961 214.3
C 15 199 7991760 37072.01 787 780 215.6
C 14 80 282096 1305.09 787 780 215.6
C 15 147 175138 808.89 787 780 215.6
D 2 62 763195 2814.31 969 927 270.9
D 11 129 572041 2108.56 969 927 270.9
D 7 96 232807 856.1 969 927 270.9

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