ASTROSAT CZTI

Data Quality Report

Orbit 31801

Creation date: 2024-06-27T20:32:54.340980
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/AS1T04_041T01_9000004642_31801cztM0_level2.evt modeM0/AS1T04_041T01_9000004642_31801cztM0_level2_quad_clean.evt
Size (bytes)761,198,400109,535,040
Size725.9 MB 104.5 MB
Events in quadrant A7,245,761683,485
Events in quadrant B6,451,261747,173
Events in quadrant C4,574,020725,686
Events in quadrant D4,355,808719,854

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257652
B0235172
C0181432
D0172922

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6314192730.519481%
B631474211.751663%
C63145709.027558%
D63141562.470700%

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 7609 6315 1159 1159 15.23% 18.35%
B 7609 6315 230 230 3.02% 3.64%
C 7609 6315 127 127 1.67% 2.01%
D 7609 6315 16 16 0.21% 0.25%

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 0 13 4217497 27276.36 785 774 154.6
A 13 254 9217 54.61 785 774 154.6
A 3 137 7067 40.71 785 774 154.6
B 6 159 1585578 9507.89 898 878 166.7
B 10 245 1307201 7837.68 898 878 166.7
B 0 190 22338 128.76 898 878 166.7
C 0 10 694111 3484.96 867 878 198.9
C 3 233 228846 1146.02 867 878 198.9
C 14 238 183853 919.84 867 878 198.9
D 8 195 637903 3000.72 912 893 212.3
D 12 227 101448 473.68 912 893 212.3
D 12 218 63580 295.3 912 893 212.3

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