ASTROSAT CZTI

Data Quality Report

Orbit 57772

Creation date: 2026-06-02T09:19:29.003512
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_083T16_9000006580_57772cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57772cztM0_level2_quad_clean.evt
Size (bytes)540,146,88099,529,920
Size515.1 MB 94.9 MB
Events in quadrant A3,952,397678,589
Events in quadrant B3,589,958720,505
Events in quadrant C8,460,224545,985
Events in quadrant D3,468,532598,517

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165152
B0154212
C0298032
D0152212

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6746490.726356%
B67461762.608953%
C6746135420.071153%
D6746991.467536%

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 7896 6747 2 2 0.03% 0.03%
B 7896 6747 65 65 0.82% 0.96%
C 7896 6747 1055 1055 13.36% 15.64%
D 7896 6747 70 70 0.89% 1.04%

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 14 1021007 5678.28 725 709 179.7
A 8 6 37734 206.06 725 709 179.7
A 4 236 36466 199.0 725 709 179.7
B 10 16 245566 1624.19 718 691 150.8
B 4 80 142309 939.31 718 691 150.8
B 10 247 112124 739.1 718 691 150.8
C 9 38 4241029 23557.04 660 652 180.0
C 15 224 1141313 6336.84 660 652 180.0
C 12 249 244176 1352.88 660 652 180.0
D 3 12 163447 824.96 700 667 197.3
D 8 160 161028 812.7 700 667 197.3
D 3 224 150259 758.12 700 667 197.3

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