ASTROSAT CZTI

Data Quality Report

Orbit 55637

Creation date: 2026-01-13T13:56:42.795494
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_021T06_9000006538_55637cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55637cztM0_level2_quad_clean.evt
Size (bytes)437,423,04094,550,400
Size417.2 MB 90.2 MB
Events in quadrant A3,577,958619,727
Events in quadrant B2,838,782674,540
Events in quadrant C3,000,178593,776
Events in quadrant D6,253,163507,073

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154061
B0137742
C0142971
D0232811

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67081742.593918%
B6707861.282242%
C6708510.760286%
D670880011.926058%

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 7553 6709 96 96 1.27% 1.43%
B 7552 6707 10 10 0.13% 0.15%
C 7553 6709 28 28 0.37% 0.42%
D 7552 6707 741 741 9.81% 11.05%

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 8 249 340903 2011.81 690 673 169.1
A 15 32 290949 1716.43 690 673 169.1
A 12 115 73694 431.78 690 673 169.1
B 7 252 30912 209.63 680 655 144.3
B 10 247 27783 187.95 680 655 144.3
B 1 159 25386 171.34 680 655 144.3
C 13 3 131596 718.39 663 656 182.3
C 6 223 73803 401.31 663 656 182.3
C 15 147 72071 391.81 663 656 182.3
D 11 129 2395002 13055.77 640 611 183.4
D 15 234 514513 2802.13 640 611 183.4
D 10 181 160458 871.59 640 611 183.4

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