ASTROSAT CZTI

Data Quality Report

Orbit 55741

Creation date: 2026-01-16T18:36:37.932684
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_55741cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55741cztM0_level2_quad_clean.evt
Size (bytes)813,709,44089,245,440
Size776.0 MB 85.1 MB
Events in quadrant A9,319,016506,256
Events in quadrant B5,514,939620,708
Events in quadrant C5,900,808615,042
Events in quadrant D8,832,324461,768

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0326290
B0217050
C0223380
D0312500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7158188926.390053%
B715896613.495390%
C71584065.671975%
D7158177924.853311%

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 7158 7158 1537 1537 21.47% 21.47%
B 7158 7158 849 849 11.86% 11.86%
C 7158 7158 317 317 4.43% 4.43%
D 7158 7158 1666 1666 23.27% 23.27%

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 4958625 29980.68 667 650 165.4
A 8 249 601150 3631.2 667 650 165.4
A 3 14 529578 3198.41 667 650 165.4
B 4 206 2711957 18200.56 691 667 149.0
B 0 199 40979 270.61 691 667 149.0
B 12 111 18488 119.63 691 667 149.0
C 9 38 1459321 7427.51 712 706 196.4
C 15 199 978935 4981.31 712 706 196.4
C 13 3 245766 1247.89 712 706 196.4
D 11 129 5476840 30479.75 633 604 179.7
D 8 245 566263 3148.35 633 604 179.7
D 8 160 156750 869.08 633 604 179.7

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