ASTROSAT CZTI

Data Quality Report

Orbit 51424

Creation date: 2025-04-01T03:26:15.383899
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/AS1A13_090T01_9000006458_51424cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51424cztM0_level2_quad_clean.evt
Size (bytes)602,337,60094,438,080
Size574.4 MB 90.1 MB
Events in quadrant A5,050,541628,962
Events in quadrant B4,480,469670,435
Events in quadrant C8,274,601515,824
Events in quadrant D3,976,440581,078

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0195972
B0178612
C0292122
D0165783

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66383615.438385%
B66384667.020187%
C6638140421.150949%
D66371852.787404%

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 7647 6638 203 203 2.65% 3.06%
B 7648 6639 227 227 2.97% 3.42%
C 7648 6639 1199 1199 15.68% 18.06%
D 7647 6638 129 129 1.69% 1.94%

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 3 963038 5382.02 727 709 178.8
A 7 64 289625 1615.82 727 709 178.8
A 15 174 186963 1041.66 727 709 178.8
B 5 185 826513 5363.33 722 696 154.0
B 5 172 142436 920.54 722 696 154.0
B 10 14 123327 796.44 722 696 154.0
C 10 171 1815124 10042.59 659 653 180.7
C 4 12 1682646 9309.36 659 653 180.7
C 10 19 585673 3237.92 659 653 180.7
D 7 80 277418 1407.85 703 677 196.6
D 11 176 241718 1226.24 703 677 196.6
D 0 129 118229 598.01 703 677 196.6

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