ASTROSAT CZTI

Data Quality Report

Orbit 00939

Creation date: 2024-06-27T14:05:01.770871
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/AS1P01_998T01_9000000188_00939cztM0_level2.evt modeM0/AS1P01_998T01_9000000188_00939cztM0_level2_quad_clean.evt
Size (bytes)1,036,074,24097,392,960
Size988.1 MB 92.9 MB
Events in quadrant A7,214,921655,126
Events in quadrant B7,556,998647,179
Events in quadrant C7,239,932623,941
Events in quadrant D8,962,595598,045

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257040
B0267430
C0258110
D0310110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6088170.279238%
B6088240.394218%
C6088100.164258%
D60892874.713418%

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 7298 6089 142 142 1.95% 2.33%
B 7298 6089 191 191 2.62% 3.14%
C 7298 6089 127 127 1.74% 2.09%
D 7299 6090 828 828 11.34% 13.60%

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 14 170 10374 19.02 1876 1886 446.2
A 11 79 7972 13.64 1876 1886 446.2
A 12 189 6231 9.74 1876 1886 446.2
B 5 249 61601 132.82 1925 1931 449.2
B 15 22 29728 61.87 1925 1931 449.2
B 7 221 26527 54.75 1925 1931 449.2
C 15 241 239759 483.78 1776 1835 491.8
C 3 111 24734 46.56 1776 1835 491.8
C 3 79 19414 35.74 1776 1835 491.8
D 12 188 1984669 3785.08 1710 1773 523.9
D 1 4 399978 760.12 1710 1773 523.9
D 2 152 65868 122.35 1710 1773 523.9

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