ASTROSAT CZTI

Data Quality Report

Orbit 55769

Creation date: 2026-01-19T16:48:37.301943
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_55769cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55769cztM0_level2_quad_clean.evt
Size (bytes)649,607,04095,955,840
Size619.5 MB 91.5 MB
Events in quadrant A9,531,571516,269
Events in quadrant B3,524,737698,207
Events in quadrant C3,665,954641,568
Events in quadrant D6,765,834547,990

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0331992
B0156963
C0165322
D0251982

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7197187926.108101%
B71973174.404613%
C71972313.209671%
D719797013.477838%

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 7227 7197 1580 1580 21.86% 21.95%
B 7227 7199 6 6 0.08% 0.08%
C 7227 7199 76 76 1.05% 1.06%
D 7226 7198 925 925 12.80% 12.85%

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 5463765 31052.11 722 703 175.9
A 7 64 322045 1826.51 722 703 175.9
A 3 14 295902 1677.91 722 703 175.9
B 5 172 211874 1268.9 764 735 166.4
B 7 0 145621 870.73 764 735 166.4
B 0 199 55646 330.0 764 735 166.4
C 9 38 480469 2343.62 749 741 204.7
C 13 3 69179 334.34 749 741 204.7
C 6 223 68103 329.08 749 741 204.7
D 7 70 2630741 12933.83 729 696 203.3
D 11 129 653835 3211.95 729 696 203.3
D 8 240 163851 802.35 729 696 203.3

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