ASTROSAT CZTI

Data Quality Report

Orbit 55750

Creation date: 2026-01-17T11:07:01.170619
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_55750cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55750cztM0_level2_quad_clean.evt
Size (bytes)604,448,64092,390,400
Size576.4 MB 88.1 MB
Events in quadrant A6,712,265582,163
Events in quadrant B6,919,887570,991
Events in quadrant C4,280,177600,371
Events in quadrant D3,947,089581,158

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245182
B0251302
C0176322
D0165142

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A663886913.091293%
B6639154523.271577%
C66395037.576442%
D66392633.961440%

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 8898 6639 707 707 7.95% 10.65%
B 8899 6641 1041 1041 11.70% 15.68%
C 8899 6641 395 395 4.44% 5.95%
D 8899 6641 161 161 1.81% 2.42%

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 1965588 11640.03 681 665 168.8
A 12 115 1302182 7710.07 681 665 168.8
A 7 64 326560 1930.57 681 665 168.8
B 2 249 4017594 28791.85 651 626 139.5
B 4 206 213891 1528.59 651 626 139.5
B 7 0 55566 393.79 651 626 139.5
C 15 199 1292392 6844.28 689 684 188.7
C 12 250 101299 533.12 689 684 188.7
C 1 16 83038 436.36 689 684 188.7
D 11 129 949414 4796.24 697 666 197.8
D 3 12 99681 500.55 697 666 197.8
D 7 129 59070 295.25 697 666 197.8

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