ASTROSAT CZTI

Data Quality Report

Orbit 55491

Creation date: 2025-12-30T23:26:00.031419
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_099T01_9000006536_55491cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55491cztM0_level2_quad_clean.evt
Size (bytes)619,968,96076,956,480
Size591.2 MB 73.4 MB
Events in quadrant A3,009,566583,599
Events in quadrant B3,036,605622,668
Events in quadrant C6,241,224474,917
Events in quadrant D10,194,820230,043

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01222
B01222
C01222
D01222

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013331128
B013512123
C022913147
D034593157

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60011682.799533%
B60051452.414654%
C6003102117.008163%
D5998362860.486829%

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 7039 6008 48 48 0.68% 0.80%
B 7032 6014 31 31 0.44% 0.52%
C 7029 6009 796 796 11.32% 13.25%
D 7028 6007 2446 2446 34.80% 40.72%

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 3 78 266051 1660.97 646 629 159.8
A 0 8 95621 594.45 646 629 159.8
A 4 3 81695 507.3 646 629 159.8
B 0 171 163101 1198.85 635 612 135.5
B 5 172 138195 1015.09 635 612 135.5
B 10 247 82241 602.26 635 612 135.5
C 9 38 2794625 17238.48 589 582 162.1
C 13 3 791019 4876.78 589 582 162.1
C 12 2 108610 666.5 589 582 162.1
D 7 70 7719825 66592.81 406 387 115.9
D 5 113 192050 1653.41 406 387 115.9
D 11 129 165491 1424.29 406 387 115.9

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