ASTROSAT CZTI

Data Quality Report

Orbit 20210523_A10_055T01_9000004400_level2

Creation date: 2021-05-24T15:28:52.891200
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/AS1A10_055T01_9000004400cztM0_level2_bc.evt modeM0/AS1A10_055T01_9000004400cztM0_level2_quad_clean.evt
Size (bytes)2,298,988,800767,341,440
Size2.1 GB 731.8 MB
Events in quadrant A12,073,9515,113,119
Events in quadrant B25,341,1935,076,894
Events in quadrant C12,629,7614,834,445
Events in quadrant D16,189,9144,799,273

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010180
B010180
C010180
D010180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01086930
B01539240
C01125010
D01203870

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A498348301.665530%
B4983412732.554481%
C4983416573.325039%
D498348441.693623%

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 60244 49835 22 22 0.04% 0.04%
B 60244 49834 22 22 0.04% 0.04%
C 60244 49834 20 20 0.03% 0.04%
D 60244 49834 162 162 0.27% 0.33%

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 523031 824.29 2957 2923 631.0
A 8 192 108547 167.4 2957 2923 631.0
A 13 254 83112 127.09 2957 2923 631.0
B 6 159 13234339 23946.66 2946 2893 552.5
B 4 171 180089 320.69 2946 2893 552.5
B 6 36 170188 302.78 2946 2893 552.5
C 3 233 997371 1535.84 2765 2769 647.6
C 0 10 865111 1331.61 2765 2769 647.6
C 2 114 95323 142.92 2765 2769 647.6
D 12 227 1538406 2402.22 2879 2803 639.2
D 8 195 1149409 1793.69 2879 2803 639.2
D 1 52 1148035 1791.54 2879 2803 639.2

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