ASTROSAT CZTI

Data Quality Report

Orbit 55720

Creation date: 2026-01-15T10:31:37.673130
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_55720cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55720cztM0_level2_quad_clean.evt
Size (bytes)679,144,32087,361,920
Size647.7 MB 83.3 MB
Events in quadrant A10,378,003418,539
Events in quadrant B3,017,964695,576
Events in quadrant C4,854,433524,351
Events in quadrant D6,363,757535,031

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0355102
B0139792
C0193602
D0236942

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6768270940.026596%
B6767751.108320%
C6768120517.804374%
D676873210.815603%

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 8883 6770 2276 2276 25.62% 33.62%
B 8882 6769 8 8 0.09% 0.12%
C 8882 6769 400 400 4.50% 5.91%
D 8883 6770 622 622 7.00% 9.19%

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 7319477 50463.99 589 574 145.0
A 12 115 232700 1600.51 589 574 145.0
A 0 8 172423 1184.9 589 574 145.0
B 0 199 80581 514.93 721 693 155.1
B 4 206 20689 128.89 721 693 155.1
B 7 0 19360 120.32 721 693 155.1
C 15 199 1730349 10196.66 618 612 169.6
C 15 177 210412 1236.75 618 612 169.6
C 9 38 183285 1076.84 618 612 169.6
D 11 129 3121164 16186.49 677 645 192.8
D 8 245 294262 1523.03 677 645 192.8
D 6 239 72288 371.62 677 645 192.8

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