ASTROSAT CZTI

Data Quality Report

Orbit 55726

Creation date: 2026-01-16T15:58:09.167456
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_55726cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55726cztM0_level2_quad_clean.evt
Size (bytes)1,047,139,20077,063,040
Size998.6 MB 73.5 MB
Events in quadrant A8,373,390547,983
Events in quadrant B3,241,919717,672
Events in quadrant C13,830,958262,706
Events in quadrant D12,763,289306,990

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297780
B0148790
C0460774
D0428510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7148151021.124790%
B7149340.475591%
C7148453363.416340%
D7148381353.343593%

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 7148 7148 1169 1169 16.35% 16.35%
B 7149 7149 0 0 0.00% 0.00%
C 7148 7148 4180 4180 58.48% 58.48%
D 7148 7147 3210 3210 44.91% 44.91%

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 2504131 14578.14 699 681 171.7
A 12 115 2008589 11692.49 699 681 171.7
A 7 64 378992 2202.99 699 681 171.7
B 4 206 169295 1046.78 751 722 161.0
B 0 199 67079 412.05 751 722 161.0
B 12 111 20076 120.18 751 722 161.0
C 9 38 10519584 72836.0 521 514 144.4
C 15 199 536607 3712.01 521 514 144.4
C 14 96 196762 1358.86 521 514 144.4
D 11 129 10143781 68854.04 525 501 147.3
D 8 245 330310 2238.79 525 501 147.3
D 3 12 94810 640.18 525 501 147.3

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