ASTROSAT CZTI

Data Quality Report

Orbit 57121

Creation date: 2026-04-19T14:25:14.067828
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_083T10_9000006566_57121cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57121cztM0_level2_quad_clean.evt
Size (bytes)652,714,560102,493,440
Size622.5 MB 97.7 MB
Events in quadrant A4,017,453719,588
Events in quadrant B3,720,639779,925
Events in quadrant C8,690,593452,512
Events in quadrant D7,142,783622,748

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0174870
B0163970
C0309730
D0264210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75981421.868913%
B75981231.618847%
C7597262734.579439%
D75974766.265631%

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 7598 7598 77 77 1.01% 1.01%
B 7598 7598 29 29 0.38% 0.38%
C 7597 7597 2012 2012 26.48% 26.48%
D 7597 7597 427 427 5.62% 5.62%

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 10 251 450091 2189.94 833 810 205.2
A 3 14 330043 1604.79 833 810 205.2
A 3 137 10411 46.8 833 810 205.2
B 0 171 164342 921.44 823 791 177.5
B 0 213 131436 736.05 823 791 177.5
B 5 172 39928 220.5 823 791 177.5
C 15 198 5120667 31438.5 591 585 162.9
C 1 16 567278 3479.63 591 585 162.9
C 12 252 254486 1559.01 591 585 162.9
D 15 142 2884060 12895.2 797 762 223.6
D 8 160 312966 1396.29 797 762 223.6
D 12 251 276243 1232.06 797 762 223.6

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