ASTROSAT CZTI

Data Quality Report

Orbit 55574

Creation date: 2026-01-05T13:12:25.759791
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_55574cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55574cztM0_level2_quad_clean.evt
Size (bytes)650,666,88093,729,600
Size620.5 MB 89.4 MB
Events in quadrant A6,297,485608,472
Events in quadrant B2,947,369684,397
Events in quadrant C9,886,089503,983
Events in quadrant D4,422,625561,690

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0235052
B0141832
C0341842
D0182952

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68744426.430026%
B6875600.872727%
C6875143020.800000%
D68752393.476364%

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 8684 6876 432 432 4.97% 6.28%
B 8685 6877 12 12 0.14% 0.17%
C 8685 6877 1485 1485 17.10% 21.59%
D 8685 6877 204 204 2.35% 2.97%

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 12 115 3281699 18833.88 697 679 174.2
A 4 159 81685 464.99 697 679 174.2
A 15 32 58122 329.74 697 679 174.2
B 5 172 69524 456.26 702 674 150.9
B 7 252 24581 158.43 702 674 150.9
B 4 67 21290 136.62 702 674 150.9
C 9 38 7006207 39235.31 647 638 178.6
C 13 3 95114 529.12 647 638 178.6
C 12 252 87679 487.48 647 638 178.6
D 11 129 1290173 6766.01 672 643 190.6
D 8 245 143863 751.46 672 643 190.6
D 4 160 96409 502.47 672 643 190.6

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