ASTROSAT CZTI

Data Quality Report

Orbit 55753

Creation date: 2026-01-18T02:12:00.242024
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_55753cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55753cztM0_level2_quad_clean.evt
Size (bytes)576,509,76079,922,880
Size549.8 MB 76.2 MB
Events in quadrant A9,655,155369,248
Events in quadrant B3,511,188592,298
Events in quadrant C2,872,884556,514
Events in quadrant D4,831,955479,787

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0328821
B0148101
C0131611
D0188481

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6040231638.344371%
B60413215.313690%
C60411061.754676%
D604161510.180434%

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 6955 6040 1971 1971 28.34% 32.63%
B 6956 6041 116 116 1.67% 1.92%
C 6956 6042 19 19 0.27% 0.31%
D 6956 6041 484 484 6.96% 8.01%

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 15 32 3492548 26474.47 537 521 131.9
A 12 115 3392535 25716.23 537 521 131.9
A 7 64 289147 2188.19 537 521 131.9
B 2 249 854681 6363.6 629 608 134.2
B 10 247 42960 315.56 629 608 134.2
B 7 0 38662 283.54 629 608 134.2
C 12 252 130773 748.87 631 623 173.8
C 14 96 85958 491.01 631 623 173.8
C 6 223 85207 486.69 631 623 173.8
D 11 129 2348729 13740.8 605 577 170.9
D 3 12 80233 466.13 605 577 170.9
D 5 173 40066 231.08 605 577 170.9

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