ASTROSAT CZTI

Data Quality Report

Orbit 55727

Creation date: 2026-01-20T15:08:31.792452
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_55727cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55727cztM0_level2_quad_clean.evt
Size (bytes)991,252,80079,678,080
Size945.3 MB 76.0 MB
Events in quadrant A9,749,437447,274
Events in quadrant B3,077,795714,917
Events in quadrant C10,453,958422,937
Events in quadrant D12,855,279325,629

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0338960
B0146910
C0361130
D0431860

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7197253235.181326%
B7198120.166713%
C7198267937.218672%
D7198360550.083356%

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 7197 7195 1989 1989 27.64% 27.64%
B 7198 7198 1 1 0.01% 0.01%
C 7198 7197 2415 2415 33.55% 33.56%
D 7198 7198 3203 3203 44.50% 44.50%

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 6261813 40276.96 625 610 155.5
A 0 8 374497 2405.13 625 610 155.5
A 12 115 201256 1290.71 625 610 155.5
B 0 199 57900 354.66 742 715 161.2
B 4 206 52462 320.94 742 715 161.2
B 12 111 19806 118.4 742 715 161.2
C 9 38 4330786 26364.82 598 593 164.2
C 15 199 2671698 16263.29 598 593 164.2
C 14 96 377417 2294.33 598 593 164.2
D 11 129 10443658 66439.55 550 527 157.2
D 10 181 68233 430.75 550 527 157.2
D 8 245 67405 425.48 550 527 157.2

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