ASTROSAT CZTI

Data Quality Report

Orbit 55746

Creation date: 2026-01-17T10:15:34.575663
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_55746cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55746cztM0_level2_quad_clean.evt
Size (bytes)635,431,68087,589,440
Size606.0 MB 83.5 MB
Events in quadrant A8,042,844449,819
Events in quadrant B2,885,676686,392
Events in quadrant C6,728,138512,869
Events in quadrant D5,373,060560,789

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0282701
B0133911
C0243531
D0203511

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6339186529.421044%
B6339170.268181%
C6339127620.129358%
D63394687.382868%

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 7184 6339 1548 1548 21.55% 24.42%
B 7184 6340 8 8 0.11% 0.13%
C 7184 6340 1091 1091 15.19% 17.21%
D 7184 6340 400 400 5.57% 6.31%

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 4598325 30641.23 590 577 150.1
A 12 115 431265 2870.28 590 577 150.1
A 8 249 257863 1714.66 590 577 150.1
B 7 0 100391 681.05 672 650 146.5
B 10 247 58618 395.82 672 650 146.5
B 0 199 35122 235.38 672 650 146.5
C 15 199 3261555 19180.64 603 596 170.0
C 9 38 581953 3419.49 603 596 170.0
C 15 147 147255 862.63 603 596 170.0
D 11 129 2701458 14473.66 649 620 186.6
D 5 173 49498 261.93 649 620 186.6
D 7 129 27054 141.66 649 620 186.6

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