ASTROSAT CZTI

Data Quality Report

Orbit 52642

Creation date: 2025-06-23T21:17:10.466949
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/AS1C09_011T06_9000006478_52642cztM0_level2.fits modeM0/AS1C09_011T06_9000006478_52642cztM0_level2_quad_clean.evt
Size (bytes)714,493,44082,889,280
Size681.4 MB 79.0 MB
Events in quadrant A4,231,652599,766
Events in quadrant B5,982,989578,450
Events in quadrant C7,056,940512,406
Events in quadrant D8,691,285380,877

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0168882
B0221272
C0254124
D0302212

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62732934.670811%
B6273100015.941336%
C6272107617.155612%
D6272211833.769133%

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 7473 6274 199 199 2.66% 3.17%
B 7473 6274 737 737 9.86% 11.75%
C 7472 6273 960 960 12.85% 15.30%
D 7472 6273 1845 1845 24.69% 29.41%

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 5 243 301873 1850.28 650 634 162.8
A 3 14 284501 1743.58 650 634 162.8
A 4 95 230878 1414.22 650 634 162.8
B 4 158 2083586 15995.94 626 607 130.2
B 10 128 596893 4579.09 626 607 130.2
B 5 185 384053 2944.62 626 607 130.2
C 15 248 3374774 19930.72 608 602 169.3
C 12 252 380697 2245.16 608 602 169.3
C 15 178 374996 2211.49 608 602 169.3
D 15 93 3057380 19961.63 521 496 153.1
D 8 176 1815734 11853.61 521 496 153.1
D 1 7 273229 1780.96 521 496 153.1

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