ASTROSAT CZTI

Data Quality Report

Orbit 20220804_A11_083T04_9000005272_level2

Creation date: 2026-01-04T00:15:02.454710
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/AS1A11_083T04_9000005272cztM0_level2.fits modeM0/AS1A11_083T04_9000005272cztM0_level2_quad_clean.evt
Size (bytes)184,423,680207,423,360
Size175.9 MB 197.8 MB
Events in quadrant A1,145,9341,325,694
Events in quadrant B1,086,0021,309,553
Events in quadrant C1,104,0721,227,886
Events in quadrant D917,2041,087,067

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0416460
B0489680
C0527540
D0621110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19330550.284532%
B193305652.922918%
C193305712.953958%
D19330229911.893430%

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 28834 19330 0 0 0.00% 0.00%
B 28834 19329 0 0 0.00% 0.00%
C 28834 19326 0 0 0.00% 0.00%
D 28834 19282 0 0 0.00% 0.00%

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 7 110 946 8.82 299 282 75.3
A 0 29 930 8.61 299 282 75.3
A 9 19 912 8.37 299 282 75.3
B 2 9 938 11.21 287 274 59.2
B 3 80 792 8.75 287 274 59.2
B 2 8 782 8.58 287 274 59.2
C 1 81 892 8.02 292 276 76.8
C 1 80 892 8.02 292 276 76.8
C 3 203 827 7.17 292 276 76.8
D 10 113 717 6.65 263 240 71.7
D 4 160 714 6.61 263 240 71.7
D 6 62 673 6.04 263 240 71.7

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