ASTROSAT CZTI

Data Quality Report

Orbit 56226

Creation date: 2026-02-18T10:25:01.015722
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_083T04_9000006550_56226cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56226cztM0_level2_quad_clean.evt
Size (bytes)669,159,36079,416,000
Size638.2 MB 75.7 MB
Events in quadrant A11,156,367344,265
Events in quadrant B5,052,594579,599
Events in quadrant C4,069,269527,899
Events in quadrant D4,000,100509,912

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0375321
B0193681
C0168251
D0164741

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6340277143.706625%
B634069410.946372%
C63404717.429022%
D63402343.690852%

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 7185 6341 2785 2785 38.76% 43.92%
B 7185 6341 499 499 6.95% 7.87%
C 7185 6341 502 502 6.99% 7.92%
D 7185 6341 196 196 2.73% 3.09%

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 2776926 20456.81 535 520 135.7
A 12 115 2771713 20418.4 535 520 135.7
A 8 176 2530882 18643.93 535 520 135.7
B 4 171 656570 4883.93 634 611 134.3
B 1 255 630086 4686.74 634 611 134.3
B 5 185 565345 4204.71 634 611 134.3
C 9 38 1253488 7115.13 644 638 176.1
C 12 252 148496 839.71 644 638 176.1
C 12 254 85764 483.44 644 638 176.1
D 8 129 761426 4209.52 635 605 180.7
D 6 239 324126 1790.0 635 605 180.7
D 2 120 149779 825.36 635 605 180.7

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